Tracking type laser interferometer and method for resetting...

Details Tracking type laser interferometer and method for resetting... Tracking type laser interferometer and method for resetting...

2011-01-18

2011-01-18

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

Range or remote distance finding

With photodetection

Reexamination Certificate

active

07872733

ABSTRACT:
A tracking type laser interferometer that detects displacement of a retroreflector300being an object to be measured by utilizing interference of a laser beam102irradiated onto the retroreflector300and reflected by the retroreflector300in the returning direction, and carries out tracking by means of a two-axis turning mechanism240using displacement in the position of the optical axis of the laser beam102; the same tracking type laser interferometer, includes; a light irradiator600that emits a fan-shaped laser light602that is fan-shaped including the optical axis of the laser beam102, is interlocked with turning movements of the two-axis turning mechanism240around an axis orthogonal to the center axis of the corresponding fan shape; and a light receptor620that has a specific positional relationship with the retroreflector300or the light irradiator600and receives the fan-shaped laser light. Thereby, tracking can be automatically reset when the tracking is disabled due to a reason such as interruption of laser light or initial adjustment work can be automated when commencing measurement.

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