Rotary encoding device using polygonal mirror with diffraction g

Details Rotary encoding device using polygonal mirror with diffraction g Rotary encoding device using polygonal mirror with diffraction g

1992-11-03

1993-11-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

052667960

ABSTRACT:
A device for position encoding of a rotating shaft in which a polygonal mirror having a number of facets is mounted to the shaft and a monochromatic light beam is directed towards the facets. The facets of the polygonal mirror each have a low line density diffraction grating to diffract the monochromatic light beam into a number of diffracted light beams such that a number of light spots are created on a linear array detector. An analog-to-digital converter is connected to the linear array detector for reading the position of the spots on the linear array detector means. A microprocessor with memory is connected to the analog-to-digital converter to hold and manipulate the data provided by the analog-to-digital converter on the position of the spots and to compute the position of the shaft based upon the data from the analog-to-digital converter.

REFERENCES:
patent: 3833808 (1974-09-01), Armand
patent: 4064435 (1977-12-01), Stebbins

Affiliated with

Also associated with

Rating

Rotary encoding device using polygonal mirror with diffraction g does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotary encoding device using polygonal mirror with diffraction g, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary encoding device using polygonal mirror with diffraction g will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2098600