Interferometric miniature grating encoder readhead using...

Details Interferometric miniature grating encoder readhead using... Interferometric miniature grating encoder readhead using...

2006-10-24

2006-10-24

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

By light interference

For dimensional measurement

C250S231160, C250S23700G

Reexamination Certificate

active

07126696

ABSTRACT:
An interferometric fiber optic encoder readhead for sensing the displacement of a scale grating is disclosed. The detector channels of the readhead are fiber optic detector channels having respective phase grating masks. The fiber optic encoder readhead is configured to detect the displacement of interference fringes arising from the scale grating. In various exemplary embodiments, the fiber optic readhead is constructed and operably positioned according to various design relationships that insure a compact mounting and a relatively ideal sinusoidal signal as a function of displacement. Accordingly, high levels of displacement signal interpolation may be achieved, allowing sub-micrometer displacement measurements. The fiber optic encoder readhead may be assembled in a particularly accurate and economical manner and may be provided in a package with dimensions on the order of 1–2 millimeters.

REFERENCES:
patent: 4291976 (1981-09-01), McMahon
patent: 4733071 (1988-03-01), Tokunaga
patent: 5486923 (1996-01-01), Mitchell et al.
patent: 5808730 (1998-09-01), Danielian et al.
patent: 5909283 (1999-06-01), Eselun
patent: 6906315 (2005-06-01), Tobiason
patent: 1 382 941 (2004-01-01), None
patent: 59173713 (1984-10-01), None
patent: 1272917 (1989-10-01), None

Affiliated with

Also associated with

Rating

Interferometric miniature grating encoder readhead using... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Interferometric miniature grating encoder readhead using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interferometric miniature grating encoder readhead using... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3661191