Optical encoder with resinous code plate

Details Optical encoder with resinous code plate Optical encoder with resinous code plate

2008-05-20

2008-05-20

Caputo, Lisa (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C235S435000

Reexamination Certificate

active

10819149

ABSTRACT:
An optical encoder, including a light emitting section; a light receiving section; and a resinous code plate disposed movably relative to the light emitting section and the light receiving section. The resinous code plate includes, on the plate face thereof, a plurality of tracks respectively provided with molded code-pattern surfaces different from each other, and a local structured-surface area formed between the tracks arranged side-by-side relative to each other, the local structured-surface area possessing a surface configuration different from the molded code-pattern surfaces of the tracks. The molded code-pattern surface of each of the tracks includes a flat surface area and an irregular surface area, adjacent to each other as seen in the extending direction of the track. The local structured-surface area is formed between the flat surface area of the molded code-pattern surface of one track and the irregular surface area of the molded code-pattern surface of another track arranged side-by-side relative to the one track. The irregular surface area of the molded code-pattern surface includes a first linear structure extending in a predetermined direction, and the local structured-surface area includes a second linear structure extending in a direction intersecting the first linear structure of the irregular surface area.

REFERENCES:
patent: 2001/0003384 (2001-06-01), Morita
patent: 2178529 (1987-02-01), None
patent: 62-003616 (1987-01-01), None
patent: 62-265523 (1987-11-01), None
patent: 08-021745 (1996-01-01), None
patent: 11-153453 (1999-06-01), None
patent: 11-287671 (1999-10-01), None
Office Action for Japanese Patent Application No. 2003-102970 mailed Jun. 7, 2005.
Japanese Office Action for Application No. JP-A-2003-102970 mailed May 23, 2006.
European Search Report issued on Mar. 15 , 2007.

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