Two dimensional position detecting device

Details Two dimensional position detecting device Two dimensional position detecting device

2008-04-01

2008-04-01

Nguyen, Sang H. (Department: 2886)

Optics: measuring and testing

Position or displacement

C356S139030, C250S201200, C396S125000

Reexamination Certificate

active

07352477

ABSTRACT:
A two-dimensional position detecting device includes a movable member which relatively moves parallel to a stationary member; a light source and a two-dimensional position sensor which are fixed to one and the other of the stationary member and the movable member, respectively, the two-dimensional position sensor receiving light emitted from the light source to detect a light-receiving point on a light receiving surface of the two-dimensional position sensor; and a reducing projector optical system, positioned between the light source and the two-dimensional position sensor, for converging the light that is emitted from the light source on the light receiving surface of the two-dimensional position sensor.

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U.S. Appl. No. 11/255,946 to Seo, which was filed on Oct. 24, 2005.
English language Abstract of JP 10-142649.
English language Abstract of JP 11-072815.
English language Abstract of JP 2001-117129.

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