Providing the uniform field of Illumination in wide spectral and dynamic ranges

Nadezhda K. Maltseva; Alexander V. Ilinskii

doi:10.1117/12.2575618

21 August 2020 Providing the uniform field of Illumination in wide spectral and dynamic ranges

Nadezhda K. Maltseva, Alexander V. Ilinskii

Proceedings Volume 11483, Novel Optical Systems, Methods, and Applications XXIII; 114830B (2020) https://doi.org/10.1117/12.2575618
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

The practice of photometric laboratory requires to receive uniform fields of illumination of different screens, apertures and sensitive areas of photo detectors in a wide spectral range of the optical spectrum (from ultraviolet to far infrared). At the same time, the level of illumination, as a rule, needs to vary within several orders of magnitude. The uniformity requirements associated with minimizing the error of photometric measurements can be quite high. While using such radiation source as “black-body” we can provide uniformity of illumination field at the rather long distances but at the same time we will not receive the required value of illumination. That could be improved by placing the right-angled four mirrored channel between the source and the photo detector. The optical radiation after numerous reflections from the mirrors reaches the surface raising the illumination level and the experiment shows the illumination uniformity of the mentioned surface is improving.

Conference Presentation

Citation Download Citation

Nadezhda K. Maltseva and Alexander V. Ilinskii "Providing the uniform field of Illumination in wide spectral and dynamic ranges", Proc. SPIE 11483, Novel Optical Systems, Methods, and Applications XXIII, 114830B (21 August 2020); https://doi.org/10.1117/12.2575618

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