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Sensors 2012, 12(10), 14113-14128;

Automatic Suppression of Intense Monochromatic Light in Electro-Optical Sensors

Fraunhofer Institute of Optronics, System Technologies and Image Exploitation (IOSB), Gutleuthausstr. 1, 76275 Ettlingen, Germany
Author to whom correspondence should be addressed.
Received: 20 September 2012 / Revised: 28 September 2012 / Accepted: 18 October 2012 / Published: 19 October 2012
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Germany 2012)
Full-Text   |   PDF [1141 KB, uploaded 21 June 2014]


Electro-optical imaging sensors are widely distributed and used for many different tasks. Due to technical improvements, their pixel size has been steadily decreasing, resulting in a reduced saturation capacity. As a consequence, this progress makes them susceptible to intense point light sources. Developments in laser technology have led to very compact and powerful laser sources of any wavelength in the visible and near infrared spectral region, offered as laser pointers. The manifold of wavelengths makes it difficult to encounter sensor saturation over the complete operating waveband by conventional measures like absorption or interference filters. We present a concept for electro-optical sensors to suppress overexposure in the visible spectral region. The key element of the concept is a spatial light modulator in combination with wavelength multiplexing. This approach allows spectral filtering within a localized area in the field of view of the sensor. The system offers the possibility of automatic reduction of overexposure by monochromatic laser radiation. View Full-Text
Keywords: laser dazzling; sensor protection; spatial light modulator; wavelength multiplexing laser dazzling; sensor protection; spatial light modulator; wavelength multiplexing
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Ritt, G.; Eberle, B. Automatic Suppression of Intense Monochromatic Light in Electro-Optical Sensors. Sensors 2012, 12, 14113-14128.

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