Apparatus for shifting reference distance of laser...

Details Apparatus for shifting reference distance of laser... Apparatus for shifting reference distance of laser...

2007-10-16

2007-10-16

Stafira, Michael P. (Department: 2886)

Optics: measuring and testing

Position or displacement

C356S622000

Reexamination Certificate

active

10731557

ABSTRACT:
An apparatus for shifting a reference distance of a laser displacement sensor is capable of extending the measuring range in a laser displacement sensor having a fixed reference distance and a fixed measurement range by smoothly changing the traveling path of the laser beam by selectively inserting the transparent members having a refraction index different from that of the air into the optical path of the laser beam. The apparatus mounted on the laser displacement sensor provided with a laser beam source for generating a laser beam and a laser beam reception member, includes a transparent member having a refraction index being different from a refraction index of an air and a holder for supporting the transparent member in such a way that the transparent member is placed in an optical path of the laser beam. The transparent member changes a reference distance of the laser displacement sensor by changing the optical path of the laser beam.

REFERENCES:
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patent: 5953125 (1999-09-01), de Groot
patent: 2004/0004723 (2004-01-01), Seko et al.

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