Semiconductor laser range finding optical system and range finder

Abstract

The invention discloses a semiconductor laser range finding optical system and a range finder. The semiconductor laser range finding optical system comprises a collimation optical path sub-system, a transmitting optical path sub-system arranged at the lower side of the collimation optical path subsystem and a receiving optical path sub-system arranged on the upper side of the collimation optical path sub-system; the collimation optical path sub-system is provided with an objective lens group, a Schmidt-Pechan roof prism group, flat glass and an eyepiece group which are distributed along an incident direction from left to right, wherein the eyepiece group comprises a cemented lens group and a biconvex lens which are distributed along the incident direction; the transmitting optical path sub-system comprises a cemented prism, a collimating lens and a semiconductor transmitting light source which are distributed sequentially along the direction of an optical axis, wherein the cemented prism includes a half pentaprism and a wedge lens; and the receiving optical path sub-system comprises a receiving lens group, a biconcave lens and an optical signal receiver which are distributed sequentially along the direction of the optical axis. With the semiconductor laser range finding optical system of the invention adopted, measuring distances can be prolonged, measuring precision can be improved, and a measuring link and a link in which collimation is difficult to be dealt with are realized. The range finder adopting the semiconductor laser range finding optical system can achieve high image contrast and high definition under any circumstances when measuring the distances of objects at different distances.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a semiconductor laser ranging optical system and a ranging instrument. Background technique [0002] As another major invention of mankind after atomic energy, computers, and semiconductors, lasers are known as "the fastest knife", "the most accurate ruler", and "the brightest light". Laser has the advantages of good directionality, monochromaticity, high brightness and good coherence, and its divergence angle and light-emitting area are very small, and the energy can be highly concentrated in a specific space. Laser is often used for non-contact distance measurement technology, which also promotes the rapid development of laser measurement technology. [0003] Compared with several other technologies for measuring distance that currently exist, the laser ranging method has the following main advantages: [0004] First, it has strong anti-interference ability and high r...

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