Laser-protected sensor technology

Glare prevention strategy

Fraunhofer IOSB is developing protection concepts that can effectively attenuate laser radiation regardless of its specific wavelength.

Laser-hardened 2-channel camera with IOSB algorithm
© Fraunhofer IOSB, B. Schwarz
Laser-hardened 2-channel camera with IOSB algorithm
Laser-hardened 3-channel camera with IOSB algorithm
© Fraunhofer IOSB, B. Schwarz
Laser-hardened 3-channel camera with IOSB algorithm

Optronic sensors are frequently used for reconnaissance and surveillance tasks in both military and civilian applications. Owing to the ongoing development of lasers with higher output power and novel laser wavelengths, these sensors are at greater risk of being blinded or damaged by such lasers. Should this occur, the sensors can no longer fulfil their intended function. Given the wide range of available laser sources, it is essential to develop innovative protective measures to effectively shield optronic sensors from all forms of laser radiation. However, despite global efforts, the solutions available to date have been less than satisfactory. Consequently, traditional laser protection filters, which offer protection only against selected laser wavelengths, remain the state of the art.

Our aim

  • Preventing Loss of Image Data in the Event of a Laser Attack
  • Maintaining Reconnaissance Capability

Laser-hardened multi-channel camera

  • The design is similar to that of a standard multi-channel camera, with significantly less crosstalk between the color channels
  • The optimized image processing delivers a largely noise-free image
  • Low SWaP (Size, Weight, and Power)
  • Flexible applications
Video footage of a laser attack without eye protection
© Fraunhofer IOSB, B. Schwarz
Video footage of a laser attack without eye protection
Camera footage of a laser attack with the anti-glare filter activated
© Fraunhofer IOSB, B. Schwarz
Camera footage of a laser attack with the anti-glare filter activated
© Fraunhofer IOSB

Principle of Operation

(a) How a standard camera works. The camera captures an image consisting of the entire visible light spectrum of the scene.

(b) How a multichannel camera works: An optical element splits the visible light spectrum into multiple channels. Different cameras capture the images of the separate spectral bands. The spectral information of the scene is reconstructed in a fused image. Using this method, in combination with a suitable algorithm, the glare from the laser light can be removed from the scene.

Additional Safety Measures

Additional solutions for protection concepts—such as protected sensors based on image reconstruction algorithms—are available upon request.

Additional Information

 

Do you have any questions about our topic or are you interested in collaborating with us? Please don’t hesitate to contact us. We’d be happy to assist you with our expertise.

 

Optronics Department

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