Infrared camera laser protection device and method based on digital micromirror device

Abstract

The invention discloses an infrared camera laser protection device and method based on a digital micromirror device. The device includes a first achromatic lens, a digital micromirror device, a laser threat processing module, a second achromatic lens, a reflector, a third An achromatic lens, an infrared imaging detector, a micromirror, a pixel relational mapping module, and an image acquisition and processing module. The invention can filter out any waveband incident infrared laser according to the intensity, has a very wide protection bandwidth, and benefits from the high damage threshold and fast response deflection ability of the metal microreflector of the digital micromirror device, and can detect infrared laser in real time The image acquisition and processing module for whether the laser is incident or not and the laser threat processing module for controlling the deflection of the metal microreflector of the digital micromirror device to filter the incident laser light make the laser protection structure have a high laser damage threshold and a fast response speed.

Description

technical field [0001] The invention belongs to the laser protection technology based on reflective and linear optics, in particular to an infrared camera laser protection device and method based on a digital micromirror device. Background technique [0002] At present, the staring infrared imaging detection technology has become the key development direction of photoelectric detection, but because the staring infrared imaging system adopts the staring working mode, the infrared camera accumulates the infrared radiation energy of the target for a long time, and is extremely vulnerable to interference, blinding and damage caused by tactical high-energy laser weapons. destroy. [0003] Compared with the rapid development of laser technology and its wide application in the military field, the development of laser protection technology is relatively slow. There are more and more wavelength types of various laser equipment, and there are broadband tunable lasers; the effective b...

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Problems solved by technology

[0005] Laser protection technology based on the principle of nonlinear optics achieves the purpose of laser protection by using nonlinear optical materials. Nonlinear optical materials mainly include liquid crystals, photorefractive crystals, semiconductors, biological materials, and metal organic compounds. Nonlinear protection The principles include self-concentration, nonlinear scattering, nonlinear refraction, excited state absorption and two-photon absorption, etc. The laser protection technology based on the principle of nonlinear optics can protect multi-wavelength lasers and broadband tunable lasers, with high linear transmittance , but poor protection against high-energy lasers

[0006] Laser protection technology based on the principle of phase change uses VO 2 or V 2 o 5 Such materials, using the principle of temperature-induced phase transition to achieve laser protection, have high protection efficiency for high-energy lasers outside the working band of the imaging system, but the response time is long and cannot protect the laser within the working band of the imaging system

[0007] Existing laser protection technologies have their own shortcomings. With the development of spatial light modulation technology and the application and promotion of digital micromirror devices, digital micromirror devices are applied to laser protection and solve the shortcomings of existing laser protection technologies. became a possibility

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