Automatic inclination corrector and inclination sensor using an

Details Automatic inclination corrector and inclination sensor using an Automatic inclination corrector and inclination sensor using an

1996-12-30

2000-05-02

Hellner, Mark

Optics: measuring and testing

Angle measuring or angular axial alignment

Photodetection of inclination from level or vertical

356148, 33366, 33377, G01C 106, G01C 906

Patent

active

060579161

ABSTRACT:
An automatic inclination corrector and an inclination sensor using the automatic inclination corrector free from the temperature, for optical instruments. A transparent container 3 seals silicon oil C having a free liquid surface C1. A collimation lens 2 guides the laser beam from the diode 1 to the free liquid surface C1. The inclination corrector corrects the tilt of the instrument to glide the laser beam L4 from the container 3 to advance the beam upward with a normal angle. A reflecting mirror 5 reflects beam L2 after total reflection at the free liquid surface C1. The beam is inverted by a roof prism 6 and passes through silicon oil C and the free liquid surface C1 once. This removes the refractive index n influence to the laser beam L4, and gives an angular change to the laser beam 4 to head the laser beam L4 to a fixed direction.

REFERENCES:
patent: 3741656 (1973-06-01), Shapiro
patent: 5392112 (1995-02-01), Nakamura
Patent Abstracts of Japan, Pub. No. 06147893A, May 27, 1994.
Patent Abstracts of Japan, Pub. No. 08035835 A published Feb. 1996.
Patent Abstracts of Japan, Pub. No. 08075466 A published Mar. 1996.

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