A laser ranging optical system and its main wave signal sampling method

Abstract

The invention relates to a laser range finding optical system and a dominant wave signal sampling method thereof. The system comprises reception object lenses, a field lens, a transformation object lens and a photoelectric detector which are arranged in order, the reception object lenses, the filed lens and the transformation object lens are arranged in the same optical axis, the field lens is placed at the focus of the reception object lenses, a first reflector is arranged between the reception object lenses and the field lens, the center of the first reflector is placed in the optical axes of the reception object lenses, the included angle between the first reflector and the optical axis of each reception object lens is 45 degree, a second reflector is arranged at one side of the first reflector, the center of the first reflector and the center of the second reflector are placed in the same straight line, and the straight line is vertical to the optical axes of the reception object lenses. The system is simple in structure, low in cost and high in measuring precision, effectively prevents the photoelectric detector from damage of too storing dominant wave signals, and is characterized by wide application range.

Description

technical field [0001] The invention belongs to the technical field of laser ranging, and in particular relates to a laser ranging optical system and a main wave signal sampling method thereof. Background technique [0002] Laser ranging refers to a measurement technology that uses a laser beam directed at a ranging target to measure the distance to a target. The laser beam is emitted by the laser light source, most of the laser beam is emitted to the ranging target through the laser emission system, and is reflected by the ranging target and returned as an echo laser beam; the echo laser beam is received by a photodetector as an echo laser beam. A small part of the laser beam converges to the photodetector as the main wave signal; the measured distance is obtained through the comparison and analysis of the echo signal and the main wave signal, combined with the ranging equation. [0003] In the existing laser ranging system, there are two design schemes for the optical sys...

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Problems solved by technology

[0003] In the existing laser ranging system, there are two design schemes for the optical system: one is the design of the separation of the transmitting optical path and the receiving optical path, the whole system is more complicated, and it is difficult to make miniaturization; Shaft design, the main wave signal and the echo signal need to pass through different photodetectors, there is a difference in circuit delay, which reduces the measurement accuracy

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