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Protection performance evaluation regarding imaging sensors hardened against laser dazzling

: Ritt, Gunnar; Koerber, Michael; Forster, Daniel; Eberle, Bernd


Optical engineering 54 (2015), No. 5, Art. 053106, 10 pp.
ISSN: 0091-3286
ISSN: 0036-1860
ISSN: 1560-2303
Journal Article
Fraunhofer IOSB ()

Electro-optical imaging sensors are widely distributed and used for many different purposes, including
civil security and military operations. However, laser irradiation can easily disturb their operational capability.
Thus, an adequate protection mechanism for electro-optical sensors against dazzling and damaging is highly
desirable. Different protection technologies exist now, but none of them satisfies the operational requirements
without any constraints. In order to evaluate the performance of various laser protection measures, we present
two different approaches based on triangle orientation discrimination on the one hand and structural similarity on
the other hand. For both approaches, image analysis algorithms are applied to images taken of a standard test
scene with triangular test patterns which is superimposed by dazzling laser light of various irradiance levels. The
evaluation methods are applied to three different sensors: a standard complementary metal oxide semiconductor
camera, a high dynamic range camera with a nonlinear response curve, and a sensor hardened against laser