Fast measuring system and method for laser information

Abstract

The invention discloses a fast measuring system and method for laser information. The fast measuring system for the laser information comprises an optical signal detecting and receiving device and a signal converting and processing system. The optical signal detecting and receiving device comprises an optical filter used for limiting the wavelength range of a received laser, a diaphragm used for limiting the incident angle of the laser, a Fraunhofer diffraction device composed of optical gratings and a cylindrical lens and a high-speed linear array CCD arranged on the focal plane of the lens. The signal converting and processing system is a high-speed signal processing system based on a DSP. The measuring system and the measuring method have the advantages of being high in first-grade diffraction fringe efficiency and light intensity, low in system noise and high in detection precision, is suitable for visible light as well as near-infrared light, far infrared light, ultraviolet light and the like, and can effectively improve early warning rate when being applied to laser emergency reporting.

Description

technical field [0001] The invention relates to a laser warning technology, in particular to a laser information rapid measurement system and measurement method capable of early warning for laser detection and laser guidance. Background technique [0002] With the increasingly widespread application of laser technology in weapons and equipment, laser detection and laser guidance have greatly improved the combat capabilities of weapon systems, making important weapons and equipment and military targets face a huge threat. Therefore, laser warning has become the first prerequisite for the realization of laser countermeasures. [0003] At present, laser warning technology has become an important content in the field of photoelectric countermeasures. Laser warning equipment is divided into spectral detection type, coherent detection type and imaging detection type according to the detection working principle. Among them, the coherent identification method is one of the most ef...

AI Technical Summary

Problems solved by technology

At present, in the development of alarm devices, sinusoidal gratings are generally used to split light. When the sinusoidal grating is diffracted, the light intensity of the first-order diffraction signal is very different from the intensity of the zero-order signal. It can account for 25% of the latter at most. In the filtering process, The primary signal that is critical to the measurement result is easily filtered out, resulting in missed alarms

Therefore, the information measurement system in the laser warning receiver has the disadvantages of low first-order diffraction fringe efficiency, weak light intensity, and is easily overwhelmed by system noise, resulting in a low early warning rate.

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