초록 ▼

A laser beam type distance measuring device comprising a laser beam emitter; a laser beam receiver having a going laser beam sensor and a returning laser beam sensor; an electrical signal processing circuit connected to the going and returning laser beam sensors; a returning laser beam guide way lea

A laser beam type distance measuring device comprising a laser beam emitter; a laser beam receiver having a going laser beam sensor and a returning laser beam sensor; an electrical signal processing circuit connected to the going and returning laser beam sensors; a returning laser beam guide way leading to the returning laser beam sensor; a polygon mirror for reflecting a going laser beam from the laser beam emitter toward a remote object and reflecting a returning laser beam from the object toward the returning laser beam guide way along which the returning laser beam travels to the returning laser beam sensor; and a reference optical track having one end directed to the laser beam emitter and the other end directed to the going laser beam sensor, so that a first part of the going laser beam from the laser beam emitter travels to the going laser beam sensor through the reference optical track. In the present invention, there is further provided a laser transmitting member, such as an optical fiber, which is arranged in parallel with path to and from the object. The laser transmitting member has one end directed to the laser beam emitter and the other end directed to the returning laser beam sensor, so that a second part of the going laser beam from the laser beam emitter travels to the returning laser beam sensor through the laser transmitting member.

대표청구항 ▼

[ What is claimed is:] [1.] An optical device for measuring the distance to a remote object, the device comprising:a light source;a light receiver having a going light sensor and a returning light sensor;an electrical signal processing unit connected to said going and returning light sensors;a retur

[ What is claimed is:] [1.] An optical device for measuring the distance to a remote object, the device comprising:a light source;a light receiver having a going light sensor and a returning light sensor;an electrical signal processing unit connected to said going and returning light sensors;a returning light guide way leading to said returning light sensor;an optical member for reflecting going light from said light source toward the remote object and for reflecting returning light from the remote object toward said returning light guide way along which said returning light travels to the returning light sensor;a reference optical track having one end directed to said light source and the other end directed to said going light sensor, so that a first part of the going light from said light source travels to said going light sensor through said reference optical track; anda light transmitting member having predetermined length and having a first end directed to said light source and a second end directed to said returning light sensor, so that a second part of the going light from said light source travels to said returning light sensor through said light transmitting member,wherein said electric signal processing unit computes a calculated length of said light transmitting member based on said first and second parts of the going light, and compares said calculated and predetermined lengths for effecting a temperature compensation of the measured distance to the object.