Optically coated dual sensors for wavelength detection

Linh Ngo Phong; Ishiang Shih

doi:10.1117/12.280332

13 August 1997 Optically coated dual sensors for wavelength detection

Linh Ngo Phong, Ishiang Shih

Proceedings Volume 3061, Infrared Technology and Applications XXIII; (1997) https://doi.org/10.1117/12.280332
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

Two designs of wavelength detector intended for field applications are presented. The first design makes use of a pair of sensors located behind a linear variable filter. The active area of one sensor increases, whereas that of the other sensor decreases, along the direction of increasing value of transmission wavelength of the filter. The second design involves the use of a pair of identical sensors, one of which is coated with a spectrally variable attenuator. For both designs, by computing the ratio of the photoresponse of one sensor to the other, the wavelength of monochromatic light is obtained from a calibration chart. Experimental wavelength detectors were constructed using superconductor and semiconductor dual sensors. The results obtained in the spectral range of 0.6 - 7 micrometer showed that sensitive, accurate detection of wavelength can be achieved for a wide range of incident angles.

Citation Download Citation

Linh Ngo Phong and Ishiang Shih "Optically coated dual sensors for wavelength detection", Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); https://doi.org/10.1117/12.280332

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