Efficient discrimination of active lighting in machine vision

Jouko O. Viitanen

doi:10.1117/12.444183

5 October 2001 Efficient discrimination of active lighting in machine vision

Jouko O. Viitanen

Proceedings Volume 4572, Intelligent Robots and Computer Vision XX: Algorithms, Techniques, and Active Vision; (2001) https://doi.org/10.1117/12.444183
Event: Intelligent Systems and Advanced Manufacturing, 2001, Boston, MA, United States

Abstract

A new optical arrangement is introduced for such applications of machine vision that need to discriminate structured laser lighting from stray ambient lighting. Instead of using transmissive filters that usually have high attenuation, a double reflective filter arrangement is presented. A combination of dielectric and metallic mirrors achieves steep stopband attenuation especially in the near infrared region where Si detectors are sensitive and common blackbody-like radiators have high spectral density. An additional advantage follows from the compact size of such a Maksutov-type mirror telescope. Compared to a corresponding refractive design, the length is reduced to less than half.

Citation Download Citation

Jouko O. Viitanen "Efficient discrimination of active lighting in machine vision", Proc. SPIE 4572, Intelligent Robots and Computer Vision XX: Algorithms, Techniques, and Active Vision, (5 October 2001); https://doi.org/10.1117/12.444183

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