Canrilloptics

https://www.canrilloptics.com/what-should-i-pay-attention-to-when-choosing-an-industrial-camera-lens.html

As a critical component of the machine vision system, the industrial camera is usually installed on the machine assembly line to replace human eyes to do measurement and judgment. Thus, choosing the right camera lens is also an essential part of machine vision system design. How should we choose the right industrial camera lens? What problems should be paid attention to when choosing an industrial camera lens? Let's learn about it.

 Basic Consideration Regarding Choosing Industrial Cameras Lens

 Choosing CCD or CMOS camera according to different applications

 The CCD industrial cameras lens is mainly used in the image extraction of moving objects. Of course, with CMOS technology development, the CMOS industrial camera is also applied for many chip mounters. The CCD industrial camera is widely used in vision automatic inspection. CMOS industrial cameras are widely used because of their low cost and low power consumption.

 Resolution of industrial cameras lens

 Firstly, by considering the object's accuracy to be observed or measured to select the resolution accordingly. If camera pixel accuracy = single direction field of view size/camera single direction resolution, then the camera's resolution in one direction = the size of the field of view in one direction / the theoretical accuracy.

 If the single field of view is 5mm and the theoretical accuracy is 0.02mm, the single direction resolution is 5 / 0.02 = 250. However, to increase the stability of the system, not only one-pixel unit is used to correspond to one measurement/observation accuracy value. Generally, multiple four or higher can be selected. In this way, the camera needs a single direction resolution of 1000 and 1.3 million pixels.

 Secondly, considering an industrial camera's output, high resolution is helpful for posture observation or machine software analysis and recognition. If it is the VGA or USB output, It should be observed on display; thus, it also depends on the resolution of the display. No matter how high the resolution of an industrial camera lens with industrial vision technology is, it isn't very meaningful if the resolution of the display is not enough. If you use the memory card or the photo-taking function, the high resolution of an industrial camera also helps.

 Camera frame number of industrial cameras lens

 When the measured object is moving, the industrial camera lens with high frame number should be selected. But generally speaking, the higher the resolution, the lower the number of frames.

 The match of the industrial lens

 The size of the sensor chip should be less than or equal to the lens size, and the C or CS-mount should also match.

 Additional Considerations over Choosing the Right Camera Lens

 C interface or CS interface. The interface distance of the C interface is 17.5mm, while that of the CS interface is 12.5mm. Only the right interface could lead to focus.

 Choosing a camera lens should also consider the size of the photosensitive device. For a 2/3-inch photosensitive chip, the industrial cameras lens corresponding to the imaging coil should be selected. If 1/3"or 1/2" is selected, there will be a large dark angle.

 Select the focal length; that is, select the industrial lens whose field of view is slightly larger than the observation range.

 Depth of field and light environment should match. For areas with enough light or light source illumination, a small aperture can be chosen to increase the depth of field, thereby improving the shooting clarity. Where there is not enough light, a slightly larger aperture or a sensitive chip with high sensitivity would be selected.

 Current Trends over Industrial Cameras Lens Choices

For choosing the right camera lens, here are several popular trends nowadays.

 Firstly, image sensors have made great strides in recent years. The trend is to have more and more pixels for better resolution of industrial cameras lens, as well as a greater sensitivity (backlight image sensor).

 What's more, the CCD technology becomes more efficient and now shares more and more features with CMOS technology sensors.

 In terms of communication interfaces, they transmit data faster and faster. The trend over the next few years will be to transmit data wirelessly, namely using Wifi.

https://www.canrilloptics.com/what-is-a-telecentric-lens.html

Industrial lenses are very important imaging components in machine vision systems. For the system to fully perform its functions, industrial lenses must meet the requirements. At the beginning of the 21st century, with the widespread application of machine vision systems in the field of precision inspection, it is difficult for ordinary industrial lenses to meet the inspection requirements. To make up for the shortcomings of ordinary lens applications and meet the needs of precision inspection, telecentric lenses came into being.

 Telecentric lens design is based on its unique optical characteristics: high resolution, ultra-wide depth of field, ultra-low distortion, and unique parallel light design, which brings a qualitative leap in precise machine vision inspection.

 Ⅰ. Industrial Telecentric Lens Definition

 Telecentric lens is mainly designed to correct the parallax of the traditional industry lens. It can be within a certain object distance range so that the image magnification will not change, which is suitable for the situation where the measured object is not on the same object surface. It is a very important application. Telecentric lenses have always been favored by machine vision applications that require high lens distortion due to their unique parallel optical path design.

 Industry Lens

 Ⅱ. Types of Industry Inspection Lens

 Generally, the industry lens with industrial vision technology consists of FA lens, Zoom lens and telecentric lens.  When the inspected object has serval surfaces or has angles with lens, or the object is moved up and down, or requires high precision and low distortion, the telecentric lens will be required.

 Ⅲ. Application Advantages Of Industrial Inspection Lens

 The telecentric industry lens of the telecentric optical system is mainly used for precision measurement. In the precision optical measurement system, due to the ordinary optical lens, there will be certain constraints, such as image distortion, errors caused by the choice of viewing angle, and boundary uncertainty caused by improper light source interference, which will affect the accuracy of measurement. The industrial inspection telecentric lens can effectively reduce or even eliminate the above-mentioned problems. Therefore, the industrial inspection lens has become a decisive component of a precision optical measurement system, and its application fields are becoming more and more extensive.

https://www.canrilloptics.com/what-are-the-classifications-of-telecentric-lenses.html

Ⅰ. The classifications of a telecentric lens

The telecentric lens types are mainly divided into the object-space telecentric lens, image-space telecentric lens and bi-telecentric lens.

 Ⅱ. Introduction of different telecentric lens types

1. Object space telecentric lens

 The object space telecentric lens places the aperture diaphragm on the image space focal plane of the optical system. When the aperture diaphragm is placed on the image-side focal plane, even if the object distance changes, the image distance also changes, but the image height does not change. There is no change, that is, the measured object size will not change. Object space telecentric lenses are used for industrial precision measurement, with minimal distortion, and high performance can achieve no distortion.

 2. Image-space telecentric lens

 The image space telecentric lens, by placing an aperture stop on the object focal plane, makes the chief ray of the image side parallel to the optical axis so that although the installation position of the CCD chip is changed, the projected image size on the CCD chip remains unchanged.

 3. Bi-telecentric lens

 The bi-telecentric lens combines the advantages of the above two telecentric lenses. In industrial image processing, generally, only object space telecentric industrial lenses are used. Sometimes there are telecentric lenses on both sides (of course the price is higher). In the field of industrial image processing/machine vision, the image space telecentric lens generally does not work, so this industry basically does not use it.

https://www.canrilloptics.com/what-are-the-accessories-of-the-machine-vision-system.html

1. Image processing system of machine vision system

Optical text, recognition system, automation/robot technology, infrared image system.

 2. Machine vision integration

Character processing and recognition system, automation/robot technology, infrared imaging system, tobacco, banknote printing, electronic assembly, quality inspection, automatic recognition (OCR/OCV), measurement, intelligent vision, surface inspection, printing, packaging, complex industrial object vision online, automobile manufacturing, license plate, biometric identification, medical testing, optical inspection and other systems.

 3. Machine vision technology

Machine vision technology is a high-tech system that integrates modern computer, optics, and electronic technologies. Machine vision technology uses a computer to process the images taken by the system, analyze the information in it, and make corresponding judgments, and then issue control instructions to the device.

 4. The specific application process of the machine vision system:

(1) Image acquisition uses a light source to illuminate the object or environment to be observed, acquires images through an optical imaging system, and converts optical images into digital images through cameras and image acquisition cards. This is the front end and information source of the machine vision system.

 (2) Image processing and analysis. The computer processes the image through image processing software and analyzes and obtains useful information. For example, whether there is a circuit break in the image of the PCB board, whether there is a defect in the image of the textile, and what text is in the image of the document, etc. This is the core of the entire machine vision system.

 (3) The machine vision program judges and controls the information obtained by image processing, and then uses it to judge the object (measured object, environment), and forms the corresponding control command, which is sent to the corresponding organization. For example, in the captured part image, calculate whether the size of the part is consistent with the standard, and if the part is inconsistent, an alarm will be issued, marking or rejection will be made.

 In the whole process, the information of the measured object is reflected as image information, and then after analysis, the characteristic description information is obtained from it, and then judgments and actions are made according to the obtained characteristics.

 A typical telecentric lens machine vision system generally includes: a light source, an optical imaging system, a camera, an image capture card, an image processing hardware platform, an image and visual information processing software, and a communication module.

 In general, a successful machine vision solution needs to focus on the key technologies of image acquisition (including light source, optical imaging, digital image acquisition and transmission), image processing and analysis.

 The machine vision optics system is a highly integrated system of opto-electromechanical computers, and its performance is not only determined by a certain link. Every link is perfect, and it does not necessarily mean that the final performance is satisfactory. System analysis and design is the difficulty and foundation of machine vision system development, and it is also something that many developers are not good at, and urgently need to be strengthened.

https://www.canrilloptics.com/the-limitations-of-machine-vision-technology-in-industrial-manufacturing.html

Industrial machine vision is the most effective way to realize smart and automated manufacturing. It has been regarded as the Machine Eyes of modern industry. It can realize non-contact measurement, defect what's human eyes can not see, and work 7*24 hours even in a bad working environment.

 However, Machine vision whole systems require investment in equipment and engineers, while most medium-size companies are with a small profit. So it is hard to apply widely. In addition, machine systems are not so flexible as humans. They can only defect as the system's command while missing very obvious defects.

 Ⅰ. Industrial Vision Technology

 Machine vision is a technique and method for providing an image-based automatic detection and analysis, which is generally used in industrial application scenarios such as automatic detection, process control, and robot guidance.

 Industrial vision technology systems require greater robustness, reliability, and stability than other visual systems, and often cost lower than those for government / military applications. Thus, industrial machine vision means cost-efficient, acceptable accuracy, high robustness, high reliability, high mechanical and temperature stability.

 Ⅱ. Components Of Machine Vision Syste

 The main components of a telecentric lens machine vision system include lighting, lenses, image sensors, visual processing, and communications. The partial inspection by the lighting’s illumination allows its features to be highlighted, so they can see the camera's lens clearly. It captures the image and presents it to the sensor in the form of light. The sensor converts light into digital images in a machine vision camera and then sends it to the processor for analysis.

 Ⅲ. Advantages of Indsutrial Machine Vision Application In Manufacturing

 The computer vision system has the ability to watch and explain, and it can automatically complete multiple tasks without manual intervention. Therefore, business users can enjoy the following benefits:

 1. A faster and simpler process

 The machine vision system can perform monotonous and repetitive tasks at a faster speed, making the whole process simpler.

 2. Accurate results

 The machine never makes mistakes. Similarly, unlike humans, machine vision systems with image processing capabilities can't make mistakes. Ultimately, the products or services provided are not only fast, but also of high quality.

 3. Cost reduction

 As the machine assumes the responsibility of performing tedious tasks, errors will be minimized, leaving no room for defective products or services. Therefore, the company can save a lot of money, otherwise, the money will be spent on repairing defective processes and products.

 No technology is perfect. The same principle applies to industrial machine vision technology. Despite the current limitations of computer vision systems, it can provide companies with huge opportunities to increase revenue sources, achieve productivity goals, and simplify work processes.

 Ⅳ. Limitations of Industrial Machine Vision Application In Manufacturing

 1. Constrained by the ambient light source

 Different light sources will cause different imaging quality and effects, directly interfere with the detection of the detection algorithm, and may cause misjudgment of the product; a single visual guidance technology cannot guarantee the accuracy of obstacle detection in the path, and the decision-making control layer often needs to integrate multiple sensors Information collected.

 2. Restricted by the performance of hardware equipment

 The camera's lens distortion correction, calibration differences, and limited viewing angle range; installation conditions and site restrictions, and requirements for sensor fusion schemes; the dark current of each pixel is different, and the response to photons is inconsistent, which will cause spatial and pattern noise in the camera; the limitation of parameter setting of CCD line scan camera lens.

 3. Restricted by computing resources on the end

 The large-scale and complex model architecture of industrial products needs to rely on powerful computing capabilities. When the memory on the device terminal is difficult to meet, it needs to use the model cloud offline training and then deploy to the device terminal; image data transmission still needs to adjust and optimize the model parameters for specific task targets, which will generate additional engineering overhead, and the real-time performance is poor.

 4. Restricted by the diversity of detection objects

 There are many kinds of defects on the surface of the object, the mechanism of defect generation is unknown, and the description of the defect is insufficient; it is difficult for the machine vision system to extract features from the data.

 5. Restricted by cost and benefit economy

 The development of the core components of machine vision system such as vision sensors and the underlying vision software requires a large investment cost.

https://www.canrilloptics.com/the-difference-between-a-telecentric-lens-and-a-normal-lens.html

The telecentric industrial lens is a lens specially designed to correct the parallax of the traditional industrial lens. In optics, telecentric meaning is a certain multi-element lens designs in which the chief rays are collimated and parallel to the optical axis in image and object space. Telecentric lens machine vision can be within a certain range of object distance so that the image magnification will not change with the change of object distance, which is a very important application when the measured object is not on the same surface.

 Telecentric Lens Vs Normal Lens

 The closer the target object of an ordinary industrial lens is to the lens (the shorter the working distance), the larger the image formed. When using an ordinary non-telecentric lens for size measurement, there will be the following problems:

 (1) Because the measured object is not in the same measuring plane, the magnification is different;

 (2) Large lens distortion;

 (3) Parallax means that when the object distance increases, the magnification of the object also changes;

 4) The resolution of the lens is not high;

 5) The uncertainty of the position of the edge of the image due to the geometric characteristics of the visual light source.

 The machine vision telecentric lens can effectively solve the above-mentioned problems of ordinary lenses, and there is no judgment error of this nature, so it can be used in high-precision measurement, metrology, etc. The telecentric lens machine vision is a high-end industrial lens, usually with superior image quality, especially suitable for size measurement applications.

 The Advantages And Disadvantages of Telecentric Lenses

No matter where, at the certain telecentric lens working distance, the same magnification will be obtained after refocusing, because the maximum field of view of the telecentric lens is directly related to the proximity of the lens diaphragm. The larger the lens size, the bigger the required scene. The telecentric measuring lens can provide superior image quality with less distortion than traditional fixed focus lenses. This telecentric lens design makes the image surface more symmetrical and can be used with software for precise measurement.

 The Advantages of Prdinary Lenses:

 low cost, practical, and versatile.

  Disadvantages of ordinary lenses:

 the magnification will change and there will be parallax.

 Ordinary lens application: imaging of large objects.

 The advantages of a telecentric lens machine vision:

 the magnification is constant, does not change with the depth of field, and there is no parallax.

 Disadvantages of telecentric lenses:

 high cost, large size, and heavy weight.

 Application of telecentric lens: metrology, measurement based on CCD, microcrystals.

  The focal length of the lens is divided into the focal length of the image side and the focal length of the object side. The image focal length is the distance from the main surface of the image to the focal point of the image. Similarly, the focal length of the object is the distance from the main surface of the object to the focal point of the object.

 The image-side focal length is the distance from the intersection of the light rays passing through the lens to the lens when the incident light is parallel; when the point light source is a certain distance from the lens, the refracted light is parallel, and this distance is called the object focal length.

 Telecentric Lens Uses

Machine vision is the technology and process that the machine detects and makes analysis the assembly line automatically.  Machine vision is mainly used in pharmaceutical assembly lines, it can inspect packaging and assembly , tracki, process control, and make robotic guidance for product or component. The key component of a machine vision system is its telecentric lens, which provides the machine with the best possible "vision". In detail, telecentric lens can be used in machine vision guidance, machine vision inspection, machine vision measurement and machine vision identification.

 Canrill manufactures a wide range of telecentric lens in various parameters. We also provide professional telecentric lens customization services. Welcome to inquiry us for details.

https://www.canrilloptics.com/the-advantages-of-machine-vision-system.html

1. The high social benefits of machine vision system

 The main benefits of machine vision to society are: saving time; reducing production costs; improving productivity and product quality; reducing the labor intensity of testing and inspection personnel; reducing the number of unqualified products; improving machine utilization and so on.

 2. The strong peripheral advantages of machine vision system

 The history of the development of automation technology is the history of machines gradually replacing humans. The human brain, limbs, senses, and nerves correspond to CPU, motion control, sensors and networks respectively. However, in many cases, human vision is increasingly unable to meet the requirements. Compared with human vision, machine vision has the advantages of high speed, high precision, supervision, macrospur, objectiveness, no fatigue, and environmental restriction.

 3. The wide applications of machine vision system

 The advanced machine vision system is often used for measurement, inspection (such as presence detection, defective product detection, digital statistics, defect detection), positioning, identification (such as code reading, color recognition), etc.

 Founded in 2009, Shenzhen Canrill Technologies Co., Ltd is the first company in China to focus on the design, manufacturing and marketing of telecentric lenses. It is also the only company that has its own mechanical factory and optical factory in the entire industrial lens industry to build a complete supply chain. If necessary, please consult us.

https://www.canrilloptics.com/selection-method-of-telecentric-lens.html

The industrial lens is an important part of the machine vision acquisition system. As a relatively young member of the lens family, the telecentric camera lens selection is becoming more popular with its unique performance.

 To know how to make a telecentric lens, you must first understand the telecentric lens's basic knowledge, from its operation principles, applications, to its type selection, and other aspects.

 However, since the telecentric lens has not been introduced for a long time, many of its characteristics have not been widely known. This article will comprehensively review the telecentric lens and reveal the mysterious journey of light in the telecentric system.

 Part one: Explanation of the working principle of the telecentric lens

First, we would start with several problems about the non-telecentric lens.

 The first problem is that in the imaging process when the working distance of the lens changes, the size of the image would change accordingly. As a result, the lens with the same focal length would have different magnifications for different working distances. This phenomenon is similar to the visual aberration of the human visual system; if you look at things near you, they are more significant than things far away. This problem can be ignored or even utilized in some applications. However, This problem can also be a significant obstacle when our vision system performs precision measurement.

 The second problem is that ordinary lenses usually have a specific range of depth of field. When the measured object is not covered by the depth of the lens's field, the image would become blurred and cannot be focused clearly. Therefore, designers have designed a focusing ring on the ordinary lens. When the working distance changes, the interesting region can be seen clearly by adjusting the focal plane. If the depth of the measured object itself exceeds a specific range, both ends of the objects cannot be seen by the lens simultaneously. Thus, to solve this problem, we have to find other methods.

 The third problem is that with the continuous improvement of imaging chips' resolution, users have more stringent requirements on measurement accuracy. As ordinary lenses are subject to the principle of optical imaging, the lens can only achieve the best measurement accuracy of about 10um. In the field of visual inspection, imaging products with higher accuracy are needed.

 A double telecentric lens is designed to solve these problems. By placing an aperture in the middle of the optical system, the leading light could pass through the center of the aperture. Then the leading light of the object side and the imaging side could enter the lens parallel to the optical axis. The parallel incident light ensures a large enough range of depth of field. Also, the parallel light from the lens ensures that even if the working distance changes significantly within the range of field depth, the imaging height, i.e., the magnification, would not change.

 Part two: Applications of the telecentric lens

When should a machine vision telecentric lens be used? We suggest that the double telecentric lens can be chosen in the following situation.

 When the object is too thick, and more than one plane needs to be measured, such as food boxes, beverage bottles, etc.

 When the object's defects need to be measured, while they can only be measured under parallel illumination in the same direction.

 When necessary to ensure the measurement accuracy; for example, when the allowable error is 1 um.

 When the object has an aperture or is three-dimensional.

 When the low distortion rate and the brightness of the image effect are required to be almost the same.

 When the measured object's position is uncertain but maybe at a certain angle with the lens.

 When the object jumps up and down in the measurement process, such as the production line's vibration leading to the change of the working distance.

 Part three: Type selection of the telecentric lens

 The type selection method of the telecentric lens machine vision is similar to that of the ordinary optical system. The following points should be paid attention to:

 Compatible CCD target surface size

 As the selection of ordinary lens, the CCD target surface compatible with the telecentric lens must be greater than or equal to the matching camera target surface; otherwise, the resolution would be wasted.

 Interface type

 At present, the interface type of telecentric lens is similar to that of the ordinary lens, including C port and F port, which can be used as long as it is matched with the camera.

 Magnification, or imaging range

 When the magnification and CCD target surface is determined, the imaging range is determined, and vice versa.

 Working distance

 Generally, when the above three points are specified, the working distance has also been determined within a specific range, which is determined by the optical imaging path. It should be noted whether the working distance meets the actual requirements. When using the telecentric system for measurement, we suggest that the lens be selected first, and other mechanical structures should be designed according to its working distance.

 Range of the depth of field

 If the conditions above are satisfied, the larger the depth of field, the better the far center system's optical characteristics, which can be used as a reference in the selection of the system.

https://www.canrilloptics.com/products/telecentric-lens/

A Telecentric lens, is a kind of lens that the chief rays are parallel to the optical axis. There are three kinds of telecentric lens, that is object space telecentric lens, image space telecentric lens, and bi-telecentric lens. Telecentric lens is always the core business of Canrill Lens. After continuous research and development for 11 years, Canrill has successfully developed 1700+ kinds of lenses, and the number is still increasing, to meet the diverse and growing applications.

 Advantages Of Canrill Telecentric Lens

 High telecentricity and little-to-no distortion for accurate measurements

Good consistency for better telecentric imaging

Extensive range of machine vision telecentric lens covering sensor size from 4.8mm to 82mm and supporting object FOV from 0.7mm to 390mm.

Considerable inventory offers the quickest leading time in industry

Quick customization service,break the customization record by producing a new lens within 12 days from design to finished product

World-famous brands endorsement, like Apple, Samsung, Huawei, Han's Laser, Foxconn, etc.

 Telecentric Lens Tutorial

 What is a Telecentric Lens?

 The telecentric lens is mainly designed to correct traditional industrial lens parallax. Within a certain range, a telecentric lens for machine vision can make the image magnification of the image does not change. Currently, due to its unique parallel optical path design, the telecentric lens has been widely favored by machine vision applications that are highly required for lens distortion.

 What's The Difference Between Resolution & Mtf30 For The Telecentric Lens?

 Resolution and MTF have a different definition method.

 Resolution formula is R=0.61*λ/NA. R is object resolution and λ is wavelength, which is usually 0.55um. NA is the numerical aperture of the object side of the lens.

 For example, XF-MT1X65D, the NA is 0.045, thus the resolution is 0.61*0.55/0.045≈7.45um. ( the resolution in our product list and drawings is 7.33um, is because decimal point numbers )

 Therefore the corresponding line pairs should be 1000/(7.33*2)=68Lp/mm.

 MTF is Contrast of output image/Contrast of input image. Since the input image is always larger than the output image, therefore the MTF value is always from 0-1.

 MTF30 means the line pairs when the image MTF value is 0.3.

 So to calculate the image side resolution, the formula is 1/MTF30/2.

 For example, XF-MT1X65D, the MTF30 is 90lp/mm, then the resolution is 1/90/2=5.56um.

 What Is The Resolution Of Telecentric Lens?

 Resolution is the ability to resolve details in the object. It describes the thinnest line that the human eye can distinguish. Normally, the resolution for machine vision telecentric lens is as below:

 R=0.6*λ/NA;

 λ is the wavelength of the light(normally λ is 550nm);

 NA is the numerical aperture of the lens.

 How To Improve The Deep Of Field (dof) Of A Telecentric Lens?

 The DOF of a telecentric lens can be changed by adjusting its aperature. When the aperature gets bigger, the DOF becomes smaller. When the aperature gets smaller, the DOF will increase.

 What's The Advantage Of Telecentric Lens System?

 Telecentric Lens can eliminate the parallax error characteristic by having a constant, non-angular field of view. Its magnification and field of view do not change at any distance from the object.

 Telecentric Lens has a very low level of distortion, which makes the telecentric lens an excellent choice for metrology applications

 Telecentric Lens can have a larger depth of field, which is beneficial in maintaining a very good image contrast even when looking at very thick objects

https://www.canrilloptics.com/products/telecentric-illuminator/

Telecentric illuminator is of great significance to the image processing system. Providing stable and reproducible illumination conditions, the telecentric illuminator produced by Canrill can help the image processing tools, such as our machine vision telecentric lens, to better capture the visual image of the object.

 Better clarity and WBC, higher telecentricity

 Especially suitable for round workpiece measurement

https://www.canrilloptics.com/products/point-illumination/

Suitable for low mag lens coaxial lighting, uniform light spot, high brightness

https://www.canrilloptics.com/products/non-telecentric-lens/

As a professional optical lens manufacturer in China, Canrill also produces high-quality non-telecentric lens with consistently high-quality.

 New series

 WD range from 49mm to 1405mm, magnification from 0.1X to 1X

 Smaller size for installation in small space

 Support to 2/3' C mounting industrial lens

https://www.canrilloptics.com/products/high-mag-1-2-sensor-telecentric-lens-long-working-distance/

Standard resolution telecentric lens

 Wide magnification range from 0.5X to 2X

 Bi-telecentric design and object telecentric design

 22 standard models of this double telecentric lens series support up to long working distance up to 300MM

 Suitable for various applications, alignment, inspection, measurement, etc.

 C mount

 Specification Of High Mag 1/2' Sensor Telecentric Lens Long Working Distance

https://www.canrilloptics.com/products/dmd-lithography-lens.html

We have been in close cooperation with LDI (Laser Direct Imaging) manufacturers, to research and produce LDI lens.

 Our dual-waveband and tri-waveband LDI lens optimize the image quality completely and the transmittance, which is better than 80% during waveband from 360nm to 400nm while ensuring the image quality in the same time.

https://www.canrilloptics.com/products/16k-line-scan-82mm-telecentric-lens/

Specially designed for large image circle up to 82mm in length

 Suitable for line scan cameras such as 16K x 5μm,16K x 3.5μm,12K x 5μm, 8K x 7μm, etc, and area scan camera such as 155 mega pixels, 151 mega pixels

 The adjustable iris of this machine vision telecentric lens series is adopted to balance the DOF and resolution perfectly

 Excellent uniformity and little-to-no distortion

 Some models support inner L90 steering, saving installation space

 16 standard models available, support object FOV from 45mm to 390mm

 Long working distance from 120mm to 700mm

 M95 Mount, support customized mount

https://www.canrilloptics.com/products/

Since 2009, Canrill has provided more than 1700 kinds of high-performance telecentric lens and illuminator for machine vision systems. With the characteristics of extensive models, immediate delivery, cost-effective solutions and free customization service, Canrill can always be your first choice to select the most suitable machine vision lens and illuminators.

 Canrill Machine Vision Lens & Illuminator List

  Telecentric Lens

Wide range of high performance telecentric lens supporting sensor size from 4.8mm to 82mm, characterized by high resolution, little-to-no-distortion, and good imaging consistency.

Telecentric Illuminator

9 types of telecentric illuminator covering the beam diameter from 20mm to 238mm, offering higher edge contrast, and is recommended for high accuracy measurement.

Non-Telecentric Lens

Non-telecentric lens MH series is the latest series Canrill has developed in 2020, suitable for measurement and high-end positioning applications which do not require telecentricity. A supplement and replacement of FA lens and low resolution telecentric lens.

Non-Telecentric Lens

Microscopy Lens

Canrill miscroscopy lens VM series adopt modular design, different combinations can realize different functions. Major module consists of main body, illumination, horizontal imaging module, mount and other special parts.

Microscopy Lens

DMD Lithography Lens

Canrill dual-waveband and tri-waveband LDI lens optimize the image quality completely and the transmittance, which is better than 80% during waveband from 360nm to 400nm while ensuring the image quality in the same time

DMD Lithography Lens

Telecentric Lens Accessory

Canrill offers different types of prism, controller and point illumination to support the use of our high performance lens. Whether you need to bend light for applications with space constraints, or point illumination matched with coaxial lens, Canrill has options to help you optimize your solution as much as possible.

 Custom Machine Vision Lens & Illuminator From Canrill

 Canrill catalog or product list on website only presents our most common models. Canrill also has an extensive of non-standard models in production. In addition, Canrill Optics offer customized machine vision lens or illuminators upon detailed request from customers. With rich experience both in optical design and mechanical engineering, and also our own optical factory and mechanical factory, Canrill is able to react fastest from design to prototype to mass production.

 Canrill's record is 12 days to produce a complete new lens including design time.

 Custom Machine Vision Lens & Illuminator From Canrill

Machine Vision Lens Fundamentals to Consider

 There Are Three Basic Principles Of Lens Selection:

 Lens Object FOV is a little larger than customer required FOV.

 Lens Image FOV is equal or larger than camera sensor size.

 Mag below 1X refers to low mag, above 1X refers to high mag.

 There Are 3 Important Factors That Contribute In The Selection Process:

 Image FOV, the sensor size of camera

 Object FOV, the size of observed object

 Working Distance

 By image FOV and object FOV, the magnification of the lens can be acquired, that is image FOV/Object FOV.

 Knowing the above, we can select a suitable lens from the existing product list.

  Example:

 Camera:1/2.5’-5MP

 Sensor size: 5.7*4.3mm

 FOV: 60*40mm

 To pick a suitable lens, first to calculate the mag, 5.7/60=0.095X, 4.3/40=0.1075X.

 Lower mag will be picked so as to cover full FOV.

 From Canrill product line, Canrill fouth generation PTL series PTL-08 series is the most suiable, and the mag of XF-PTL09228 is 0.0847, is the closest figure to 0.095X.

 Thus XF-PTL09228 is selected.

A Telecentric lens, is a kind of lens that the chief rays are parallel to the optical axis. There are three kinds of telecentric lens, that is object space telecentric lens, image space telecentric lens, and bi-telecentric lens. Telecentric lens is always the core business of Canrill Lens. After continuous research and development for 11 years, Canrill has successfully developed 1700+ kinds of lenses, and the number is still increasing, to meet the diverse and growing applications.

https://www.canrilloptics.com/products/telecentric-lens/