All-solid-state laser radar scanning method

Abstract

An all-solid-state laser radar scanning method employs a routine signal light source to enforce surface irradiation of a detection field, a liquid crystal light valve array is employed to switch each liquid crystal light valve unit on the liquid crystal light valve array one by one on an optical path between the optical module of a signal receiving module and a routine photoelectric receiver, and the reflection light of the whole detection scene is divided into optical signals one by one so as to realize all-solid-state scanning. The all-solid-state laser radar scanning method can use the routine signal light source and the routine photoelectric receiver, solve the problem that a current all-solid-state laser radar scanning method must depend on various special scanning chips and have a wide application prospect.

Description

technical field [0001] The invention relates to a scanning method of an all-solid-state laser radar, which belongs to the field of photoelectric detection. Background technique [0002] The laser radar is composed of three parts: the signal transmitting module, the signal receiving module, the signal processing and the control circuit. Among them, the existing all-solid-state laser radar has two scanning schemes. One is to use the beam scanning laser chip in the signal transmitting module to deflect the beam. The optical scanning method of irradiation, and the other is to directly let the photoelectric units arranged in an array on the array photoelectric receiving chip electronically scan in the signal receiving module. Both of these methods need to rely on the above-mentioned special scanning chips. These special scanning chips are There are the problems of complex manufacturing process, low output and high cost. For example, Quanergy’s S3 optical phased array laser scann...

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Problems solved by technology

[0002] The laser radar is composed of three parts: the signal transmitting module, the signal receiving module, the signal processing and the control circuit. Among them, the existing all-solid-state laser radar has two scanning schemes. One is to use the beam scanning laser chip in the signal transmitting module to deflect the beam. The optical scanning method of irradiation, and the other is to directly let the photoelectric units arranged in an array on the array photoelectric receiving chip electronically scan in the signal receiving module. Both of these methods need to rely on the above-mentioned special scanning chips. These special scanning chips are There are problems of complex manufacturing process, low output and high cost

For example, Quanergy’s S3 optical phased array laser scanning chip is a beam scanning laser chip used in the signal transmission module to perform optical scanning through beam deflection and irradiation. The manufacturing process of this type of chip is very complicated and the production cost is high. Therefore, it has not been widely used in the market so far.

For another example, Hamamatsu's distance image sensor series chip is an array photoelectric receiving chip specially designed for all-solid-state scanning of the signal receiving module. It is similar to a CCD image sensor and uses many photoelectric units arranged in an array on the chip The manufacturing process of the device that directly measures and electronically scans the optical signal is also very complicated. The purchase price of the chip alone exceeds 100 US dollars, which is obviously much higher than the price level of conventional photoelectric receiving devices.

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