Telecentric lenses aren’t limited to one type. It comes in three broad types: object-space telecentric lens, image-space telecentric lens, and Bi-telecentric lens.

At VicoImaging, we provide you with the best, most effective, and budget-friendly telecentric lenses. We have tons of testimonies from customers who have a lot of amazing things to say about our high-resolution telecentric lenses.

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Telecentric lenses can reduce or even eliminate all such issues. They can achieve a high grade of accuracy and precision in imaging systems.

So far, you have seen many advantages of telecentric lenses. While talking about the high side of Telecentric Lenses, we should not also forget that there are downsides to it.

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The focal length of a telecentric lens matters a lot. Make sure you calculate the focal length. Your calculation would depend on your capturing distance from the object.

As a result, you get precise images since all aberrations driven by off-axis rays get eliminated. It is something not achievable with ordinary lenses.

The first advantage is their depth of field, which is ultra-wide. It means you can focus on the object you want to capture from various angles. Moreover, it helps in situations where the image is captured from three dimensions.

But, if you want to detect abnormalities and defects during the quality inspection, you must prefer color cameras. The telecentric lenses can offer precise color representation for a long-distance object.

In short, this type of lens can capture the image while keeping the measured object size intact. Thus, the object space telecentric lens is suitable for industrial applications requiring low distortion.

Vision systems often make use of color cameras. Yet, there are others that utilize monochrome. They use monochrome because they are way cheaper than color cameras.

Additionally, telecentric lenses have low distortion. It makes them ideal in applications where accurate alignment is essential. For instance, you will find them in robotics, 3D scanning, and other automated systems. These lenses are also used in the field of microscopy.

So this makes them particularly useful in metrology, quality control, and inspection. Besides, many companies use them for machine vision applications that need precise measurements of an object’s size or position.

The distance between the image sensor or film and the lens doesn’t matter in image-space telecentric lenses. These lenses can still create images of the same size.

Many people ask about where they can purchase high-quality telecentric lenses. If you are unsure, this section will give you the correct answer.

The exit pupil is at infinity in image-space telecentric lenses. As a result, the lens can focus on different distances and create an image without affecting the size.

Of course, yes! It is possible to improve the DoF of a telecentric lens. You can change the DOF of a telecentric lens by changing its aperture.

High-quality telecentric lenses offer a shallow distortion degree. So, if high-level image quality is what you desire, telecentric lenses are your best bait.

The bi-telecentric lens is a unique type that merges the features of both the object space and image-space telecentric lenses.

Telecentric lenses reduce the edge angle of the image sensor and light rays. With this, it produces little to no distortion and improves the quality of the image that is being captured.

So in telecentric lenses, the stop aperture is precisely placed on the focal plane. As a result, the incoming rays focus on the entrance pupil. This entrance pupil appears as if it is virtually positioned at infinity.

As we know, high-quality optics can provide high-performance results. You must invest in high-quality telecentric lenses if you want precise magnification for a specific application.

In telecentric lenses, two lenses are placed together with different focal lengths. The first lens takes the light from the object being captured. After that, it focuses the light on the second lens.

There are different times when telecentric lenses can give you better results than ordinary lenses. Below are some scenarios when you can employ telecentric lenses.

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Telecentric lenses are large and not so portable. You might not be able to carry your telecentric lens if you do not have plans to bring a big bag pack.

Another advantage of telecentric lenses is low distortion. It means that the output image is a close replica of the object with minimal distortion or blurring.

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Ordinary non-telecentric lenses may not be suitable for machine vision applications. That’s because they cannot perform repeatable, highly-accurate measurements quickly.

Distortion is a common issue that can limit measurement accuracy. Remember, it can impact even the best-performing optics.

Conventional lenses have an angular field view of images when they are captured. Thus, the farther the distance between the camera and the object, the smaller it becomes in size.

We sincerely apologize for the inaccuracies in our previous description and appreciate your correction. We are committed to continually improving our content to ensure accuracy and clarity. If you have any further questions or require additional clarification, please feel free to reach out to us. Thank you once again for your valuable feedback.

Hi David, the part of your reply after the “yes, you can” is wrong : a lens with an infinite focal length would have no curvature, it would be a window. Windows however do not map objects to images, which is the _definiting property_ of a lens. Therefore lenses with infinite focal length do not exist. What you mean is a designed focus _distance_ of infinity. _All_ image generating lenses are equivalent to a thick, convex lens. So the word “convex” can be skipped here. Best regards Micha

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The VISION Congress in 2022 gathered over 550 participants who were able to witness the latest developments in lighting and ADAS (Advanced Driver Assistance Systems). These advancements were showcased across 35 booths and 22 demonstration vehicles.

Telecentric lenses have high resolution across the entire field of view. It makes them useful in applications that require high resolution, for example, microscopy, metrology, and machine vision.

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When instead the distance from the object is 'short' (rule of thumb: <10x Focal length), we are in macro mode and the focus plane is placed further away from ...

Let’s split the word telecentric for better understanding. The term ‘tele’ means distant or far. Likewise, the term ‘center’ refers to the pupil aperture in this context, i.e., the main center of an optical system.

Since the entrance pupil is far away, perspective distortion reduces in telecentric lenses. It is helpful in applications where perspective distortion needs to be reduced, such as architectural photography.

The range of imaging is determined according to the CCD target surface. For better magnification, the object should remain within a specific range, i.e., the telecentric range.

Aperture

Ordinary lenses often exhibit common issues, affecting the image processing experience. It includes poor image resolution, positional uncertainty of an object edge, perspective errors, and image distortion. Even more, ordinary lenses cannot stand for proper magnification when an object is displaced.

Likewise, telecentric lenses also have a large magnification. It helps assess fine details on tiny objects, like dents or scratches.

Furthermore, there are other ways that telecentric lenses can be used. They can be utilized for cameras, as well as microscopes.

The achievable frame rate is often affected by the camera output. Thus, you must be sure of the lens and camera compatibility before you go for it.

VicoImaging manufactures a broad range of telecentric lenses in different parameters. You can use our proficient telecentric lens customization service if you have unique needs.

When looking for the sensor type, you should choose between CCD and CMOS. Although in recent times, the differences between them have literally gone extinct.

Telecentric zoom lens

The best part is that our telecentric lenses are not imported. Instead, they are manufactured in-house with a guarantee and warranty.

Even in medical fields, organs and body tissues are viewed and captured with telecentric lenses. As you can see, the applications of telecentric lenses are vast.

The lens might fulfill the above points, but the cost alone can become your primary concern. Before setting out, we recommend you do a market survey about the prices of the telecentric lenses.

When the lens’s aperture diaphragm is on the camera, the distance of the edge of the image will change. However, that doesn’t mean that the height of the image will change.

Choosing the right telecentric lens can be tricky. Of course, you don’t want to make mistakes or waste money on a lens that won’t serve you.

Feel free to inform us about your application needs. Be it field of view, wavelength, or improved imaging! We can optimize our existing designs to meet your specific requirements.

Thorlabs telecentric lens

Unlike conventional lenses, telecentric lenses have fantastic, unique parallel line designs that make the image look better.

It is useful in measurement applications, as the image size will not change. That’s because this feature makes it easier to take accurate measurements.

Telecentric Lens cost

Thus, telecentric lenses are ideal for various machine vision applications where the distance between the target and the camera is quite long.

Opto lens

People often ask what to look for when choosing the right telecentric lens. They particularly emphasize the ‘type’ of the lens.

Another disadvantage of telecentric lenses is that they are heavy. And, most times need extra power and strength to carry them around.

Quality control and inspection are two major processes followed in manufacturing. Nowadays, many industries are relying on advanced technologies to perform these operations. And machine vision industry is not an exception to it.

Since telecentric lenses have a vast field of view, they can view the whole object in one image. As a result, identifying defects becomes easier.

The telecentric lenses are the improved version of ordinary lenses. These lenses use advanced technology. Besides, the lenses are made of expensive materials.

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The fixed focal length lenses often have an angular field of view. It results in objects being imaged smaller. You can check our collection of fixed focal length lenses.

Telecentric lens

Because the entrance pupil is far away, the depth of field is much greater than a standard lens. It is helpful in applications that need a considerable field depth, such as machine vision systems.

Telecentric lenses also have aberration resistance. In short, these lenses can produce more precise and sharper images with zero distortion.

So, go ahead and browse our collection of telecentric lenses. You can also talk to VicoImaging support team for custom orders.

In ordinary optics, the light rays usually bend at different angles when they exit the lens. However, a telecentric lens works differently. It keeps all light rays parallel after leaving the lens.

To achieve this, the aperture stop is placed in the lens assembly to obstruct all off-axis light. Thus, it can only emit light that is parallel to the imaging axis.

As you can see, the advantages of telecentric lenses beat the disadvantages. So, we recommend you focus on the positive aspects of telecentric lenses before buying them.

Telecentric scan lens

Telecentricity is a common term used in imaging optics. It refers to a unique lens design with parallel chief rays across the field of view.

So, telecentric lenses can help measure objects in three dimensions. Moreover, these lenses are helpful in tasks like inspecting big objects and checking the fine details of tiny objects.

With this, you can dodge the hassle of designing a new telecentric lens fully from scratch. Moreover, you can also reduce or remove design fees.

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Before we proceed further, you must understand the basic theory behind image capturing. And also how the telecentric lens captures magnificent shots.

Also, these lenses can be used to inspect objects and other materials. It is done through the magnification features of the telecentric lens.

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It is challenging to determine the actual position of the object’s edges, especially when there is backlighting. It happens because the object’s dark pixels overlap with the illuminated pixels in the background. Telecentric lenses can overcome this effect and offer a clearer image.

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As the name suggests, the rays of the telecentric lens travel through the middle of the parallel aperture. It can settle either at the back or in front of the vision system. Then, the settled ray in the lens goes into tiny imagery particles.

Telecentric lenses are a special type of lens usually used to maximize imaging performance. They can also help to lower distortion and capture measurements accurately.

Instead, telecentric lenses achieve the highest possible accuracy. Let’s discuss the exceptional characteristics of telecentric lenses.

Michael thank you for pointing out the error in our previous description. In optics, convex lenses indeed represent a positive focal length, and only lenses with a positive focal length can image objects at infinity onto the image plane, hence the term “convexity” cannot be omitted. However, the statement regarding using a lens with an infinite focal length to image an object at infinity is incorrect. The accurate statement is that an infinite object distance, finite focal length, and image-side telecentric lens can be utilized, and a lens with a finite focal length on the image-side telecentric lens has a certain field of view angle (our DTCM’s field of view angle is 12 degrees).

Remember, the DoF and aperture are inversely proportional. It means when the aperture gets larger, the DoF will become smaller.

Recently, the use of Machine Vision technologies has rapidly increased in various applications. And its popularity has skyrocketed so much that it is found in almost every other industry.

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This post will cover everything you should know about the telecentric lens and its usage. If you have little or no knowledge about telecentric lenses, take your time and read this article.

Ordinary optics have different distortion values, making it challenging to get precise measurements. Moreover, things can get even more destructive with non-telecentric lenses.

When we apply this principle to illumination, it results in a collimated light beam with lower divergence and excellent uniformity. The device that helps achieve this is called a telecentric illuminator.

Telecentric lens design

Telecentric lens is a vital element of the machine vision industry. It provides the machine with a ‘vision’ as clear and sharp as you can imagine.

You can quickly see the difference by comparing the images captured by ordinary and telecentric lenses. You will notice that images captured by telecentric lenses have greater precision and detail.

For instance, when you want to achieve accuracy, ensure you capture the object’s tiniest details. It is only possible when you use telecentric lenses.

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Now, you might wonder how telecentric lenses work and capture precise images. Well, the secret lies in the making of telecentric lenses.

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Ordinary lenses provide varying magnifications at various conjugates. So, the object’s image size changes almost proportionally when you displace the object.

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Lastly, the second lens projects the light to the back end of the device, i.e., the diaphragm. This device controls the amount of light entering the sensor. It ensures only light rays parallel to its surface can pass.

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As discussed above, distortion is a common issue in lenses. It affects measurement accuracy. Also, even top-level optics are impacted by some degree of distortion.

These lenses are consistent and precise. Moreover, they have low distortion, a large depth of field, and high magnification. Bi-telecentric lenses are used for both industrial and machine vision image processing.

Telecentric lenses have become an integral part of machine vision systems. That’s because they have a long working distance and large magnification.

The improvement of the camera, illuminations, and software components have also made it easier to capture clear images. Of course, these images are much better than those caught with lasers and other conventional methods.

It has to do with the optical characteristics of the field and the size of the field. It is determined by the wavelength and F number of the lens. Telecentric lenses often have a large and more adjustable depth of field than ordinary lenses.

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Don’t worry; we’ll explain this term better. While selecting your telecentric lens, the CCD target surface should either be bigger or equal in size to the surface target of the camera.

These lenses are often used for long-distance cameras to capture clear images. Besides, telecentric lenses can provide a sharper field view of an image.

Magnification is the main point of comparison here. As you know, magnification depends on the distance between the lens and the object.

However, the telecentric lens is the total opposite of the conventional lens. The angle of the field view is not a determinant of the distance, height, or size.

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So, what are telecentric lenses? How do these lenses work? How can you choose the right telecentric lenses for your upcoming work?

Telecentric lenses are commonly used in machine vision systems in various ways. Some machine vision applications have unique needs.

So, if you want your object magnified with a conventional lens, you must get closer to the object. Unfortunately, this angular field view increases the chances of an image parallax, also known as perspective error.

If you give an up-close look, you’ll realize that the telecentric lens’s interface is almost identical to that of the regular lenses. Hence, you must consider the interface type before purchasing.

These lenses have a unique optical design that keeps the size of the object image constant. It does this regardless of the distance between the lens and the object.

Yes, you can， An ideal convex lens with an infinite focal length can meet this requirement. In reality, you need to find an image space telecentric lens with an infinity focal length.

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