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2023
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06
Design of telecentric lenses
Telecentric lens design purpose is to eliminate due to the measured object (or CCD chip) from the lens distance is not consistent, resulting in different magnification. According to the telecentric lens classification and its design principle is as follows:
1. Object-side telecentric light path design principle and role: the object side of the main light parallel to the optical axis of the main light convergence center is located in the image of the infinite distance, called: the object-side telecentric light path. Its role is to eliminate the object side due to focusing is not allowed to bring, reading error.
2. The image of the telecentric light path design principle and role: the image of the main light parallel to the optical axis of the main light convergence center is located in the object side of the infinite distance, called: the image of the telecentric light path. Its role is to eliminate the measurement error introduced by the inaccurate focusing of the image side.
3. Both sides of the telecentric light path design principle and role: a combination of the object side / image side of the double role of the telecentric. Mainly used in the field of visual measurement and inspection. From the above types of telecentric lens design principle can be seen, telecentric lens is to take full advantage of the optical imaging characteristics, give full consideration to the impact of light in the imaging of the design of high-precision lenses, currently in the field of machine vision precision measurement, high-precision detection has been widely used.
Keywords: intelligent lighting
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