Why are bi-telecentric industrial lenses so large?




The telecentric lens has excellent imaging quality and is a high-performance industrial lens, especially suitable for precision measurement in machine vision. Telecentric lenses can be divided into three categories: image-side telecentric lenses, object-side telecentric lenses, and double-telecentric industrial lenses. Among them, double-telecentric lenses are image-side telecentric and object-side telecentric double-telecentric optical paths. It has the advantages of small degree, low distortion and high resolution.



There are various classifications of industrial lenses. In practical applications, we can see that bi-telecentric industrial lenses are usually larger than other types of industrial lenses. Why?



In fact, because the bi-telecentric lens is parallel light in and out, the larger the shooting area is, the larger the area of ​​parallel light is needed, so the larger area of ​​the lens barrel is required, so the bi-telecentric lens is usually larger in size and has a larger field of view. The bigger the volume, the bigger the volume.



The double telecentric lens can effectively solve the following problems:



1. Resolution problem:

The resolution of ordinary industrial lenses cannot keep up with the improvement of chip resolution. It is subject to the principle of optical imaging and cannot meet the requirements of current high-resolution cameras and high-precision measurement and detection.



2. Depth of field problem:

The depth of field of an ordinary lens is relatively small. When the object to be measured exceeds its range in the depth direction of the lens, detection or measurement cannot be performed.



3. The magnification problem:

The magnification of ordinary industrial lenses changes with the distance. This characteristic can lead to intolerable errors when our vision systems are used to perform precision measurement tasks.



As a core product supplier of machine vision and industrial automation, POMEAS can customize software and hardware such as telecentric industrial lenses, industrial cameras, visual light sources, and image processing systems for you, and provide you with one-stop technical consulting services to make you more Build your own confidential vision inspection system simply and faster.



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