Triple grating optical encoder with light transmitting area...

Details Triple grating optical encoder with light transmitting area... Triple grating optical encoder with light transmitting area...

2006-05-03

2008-08-26

Sohn, Seung C (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S23700G

Reexamination Certificate

active

07417218

ABSTRACT:
An optical encoder is a reflecting triple grating type optical encoder. A light projecting section of the optical encoder which includes a combination of a bare chip LED and a first grating of a first pitch p1, irradiates a predetermined light. A photodetecting section of the optical encoder which includes a combination of a photodetector and a third grating of a third pitch p3detects a movement of a self image. Each of the first grating and the third grating is disposed substantially parallel with respect to a scale, and a substantially parallel and substantially flat light transmitting area is formed in a predetermined portion of a surface of a detecting head. A light transparent member is disposed in a space between the surface of the detecting head, and the first grating and the second grating.

REFERENCES:
patent: 4695719 (1987-09-01), Wilwerding
patent: 6528779 (2003-03-01), Franz et al.
patent: 6603114 (2003-08-01), Holzapfel et al.
patent: 2003/0189213 (2003-10-01), Igaki et al.
patent: 2005/0023450 (2005-02-01), Ito
patent: 2005/0218313 (2005-10-01), Kuroda
patent: 2006/0007451 (2006-01-01), Ito
patent: 0 672 891 (1995-09-01), None
patent: 0 843 159 (1998-05-01), None
patent: 2247313 (1992-02-01), None
patent: 2003-166856 (2003-06-01), None
Palik, Edward D. Handbook of Optical Constants of Solids. (pp. 771-774). Elsevier. 1998. Accessed Jul. 17, 2007. <http://www.knovel.com/knovel2/Toc.jsp?BookID=1669&VerticalID=0>.

Affiliated with

Also associated with

Rating

Triple grating optical encoder with light transmitting area... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Triple grating optical encoder with light transmitting area..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Triple grating optical encoder with light transmitting area... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4011029