Panel Discussion: Stray Light And Contamination In Optical Systems

1989 ◽  
Author(s):  
Bob Breault
Keyword(s):  
Panel Discussion ◽  
Stray Light ◽  
Optical Systems

Use of the photon mapping methods for the optical systems stray light analysis

2021 ◽  
Author(s):  
Igor Kinev ◽  
Igor Potemin ◽  
Andrei Lemeshev ◽  
Andrey D. Zhdanov ◽  
Ludmila Arhipova ◽  
...  
Keyword(s):  
Stray Light ◽  
Optical Systems ◽  
Photon Mapping

Stray light measurement for point source transmittance of space optical systems

2016 ◽  
Author(s):  
Qinfang Chen ◽  
Zhen Ma ◽  
Xinyao Li ◽  
Zhihai Pang ◽  
Liang Xu ◽  
...  
Keyword(s):  
Point Source ◽  
Stray Light ◽  
Optical Systems ◽  
Light Measurement ◽  
Space Optical Systems

scholarly journals Estimation of Lens Stray Light with Regard to the Incapacitation of Imaging Sensors

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6308
Author(s):  
Gunnar Ritt ◽  
Bastian Schwarz ◽  
Bernd Eberle
Keyword(s):  
Light Scattering ◽  
Theoretical Model ◽  
Stray Light ◽  
Optical Systems ◽  
Optical Elements ◽  
Laser Safety ◽  
Engineering Software ◽  
Commercial Off The Shelf ◽  
Generic Set ◽  
Imaging Sensors

We present our efforts on estimating light scattering characteristics from commercial off-the-shelf (COTS) camera lenses in order to deduce thereof a set of generic scattering parameters valid for a specific lens class (double Gauss lenses). In previous investigations, we developed a simplified theoretical light scattering model to estimate the irradiance distribution in the focal plane of a camera lens. This theoretical model is based on a 3-parameter bidirectional scattering distribution function (BSDF), which describes light scattering from rough surfaces of the optical elements. Ordinarily, the three scatter parameters of the BSDF are not known for COTS camera lenses, which makes it necessary to assess them by own experiments. Besides the experimental setup and the measurement process, we present in detail the subsequent data exploitation. From measurements on seven COTS camera lenses, we deduced a generic set of scatter parameters. For a deeper analysis, the results of our measurements have also been compared with the output of an optical engineering software. Together with our theoretical model, now stray light calculations can be accomplished even then, when specific scatter parameters are not available from elsewhere. In addition, the light scattering analyses also allow considering the glare vulnerability of optical systems in terms of laser safety.

Stray Light in Optical Systems*

1947 ◽  
Vol 37 (6) ◽  
pp. 434 ◽  
Author(s):  
Howard S. Coleman
Keyword(s):  
Stray Light ◽  
Optical Systems

scholarly journals Stray light reduction of silicon particle reinforced aluminum for optical systems

2019 ◽  
Author(s):  
Jan Kinast ◽  
Alexander Telle ◽  
Sven Schröder ◽  
Marcus Trost ◽  
Stefan Risse
Keyword(s):  
Silicon Particle ◽  
Stray Light ◽  
Optical Systems ◽  
Light Reduction

scholarly journals The Nature, Significance, and Evaluation of the Schwarzschild-Villiger (SV) Effect in Photometric Procedures

1959 ◽  
Vol 6 (3) ◽  
pp. 313-337 ◽  
Author(s):  
D. H. Howling ◽  
P. J. Fitzgerald
Keyword(s):  
Optical System ◽  
Transmission Error ◽  
Stray Light ◽  
Optical Systems ◽  
Beam Specimen ◽  
Beam Diameter ◽  
Simple Method ◽  
Small Magnitude ◽  
Specimen Diameter ◽  
Illuminating Beam

The Schwarzschild-Villiger effect has been experimentally demonstrated with the optical system used in this laboratory. Using a photographic mosaic specimen as a model, it has been shown that the conclusions of Naora are substantiated and that the SV effect, in large or small magnitude, is always present in optical systems. The theoretical transmission error arising from the presence of the SV effect has been derived for various optical conditions of measurement. The results have been experimentally confirmed. The SV contribution of the substage optics of microspectrophotometers has also been considered. A simple method of evaluating a flare function f(A) is advanced which provides a measure of the SV error present in a system. It is demonstrated that measurements of specimens of optical density less than unity can be made with less than 1 per cent error, when using illuminating beam diameter/specimen diameter ratios of unity and uncoated optical surfaces. For denser specimens it is shown that care must be taken to reduce the illuminating beam/specimen diameter ratio to a value dictated by the magnitude of a flare function f(A), evaluated for a particular optical system, in order to avoid excessive transmission error. It is emphasized that observed densities (transmissions) are not necessarily true densities (transmissions) because of the possibility of SV error. The ambiguity associated with an estimation of stray-light error by means of an opaque object has also been demonstrated. The errors illustrated are not necessarily restricted to microspectrophotometry but may possibly be found in such fields as spectral analysis, the interpretation of x-ray diffraction patterns, the determination of ionizing particle tracks and particle densities in photographic emulsions, and in many other types of photometric analysis.

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