| 摘要 |
An optical system for a laser range finder comprises a laser emitter ( 5 ), a collimating lens ( 4 ) positioned in front of the laser emitter an optical receiver ( 3 ), a light receiving aspheric lens ( 1 ) for converging reflected light from a target object to be measured on the optical receiver, and a polygonal prism ( 2 ) disposed between the light receiving aspheric lens and the optical receiver. The light receiving aspheric lens defines a cutout in a position corresponding to a laser light beam emitted by the laser emitter for allowing passage of the laser light beam therethrough. The polygonal prism consists of a first portion and a second portion refracting the reflected light at different refraction angles for light path compensating purposes.
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