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New light absorbing material for grazing angles

: Yevtushenko, A.; Finck, A. von; Katsir, D.; Duparré, A.


Haverkamp, N. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Optical Instrument Science, Technology, and Applications : 14-15 May 2018, Frankfurt, Germany
Bellingham, WA: SPIE, 2018 (Proceedings of SPIE 10695)
ISBN: 978-1-5106-1928-9
ISBN: 978-1-5106-1927-2
Paper 106950J, 8 S.
Conference "Optical Instrument Science, Technology, and Applications" <1, 2018, Frankfurt>
Conference "Optical Systems Design" (OSD) <2018, Frankfurt>
Fraunhofer IOF ()

One of the largest challenges for optical systems is eliminating stray light generated by reflections off the walls and other optical elements of the device. Most black coatings are not sufficiently effective at grazing angles. Acktar’s black coatings exhibit particularly low residual reflectance and have been implemented in various instruments. The new proposed material exhibits particularly low hemispherical and specular reflectance – especially at grazing angles.