Object measuring method and apparatus

Details Object measuring method and apparatus Object measuring method and apparatus

1978-08-08

1980-10-07

McGraw, Vincent P.

Optics: measuring and testing

By polarized light examination

With light attenuation

250237G, G01B 1114, H01J 3912

Patent

active

042265355

ABSTRACT:
Apparatus is disclosed for measuring the movement of an object comprising an optical imaging device for producing an image of said object, a grating structure positioned to receive the image of said object produced by said imaging device, drive means for producing a periodic relative movement between said grating structure and the image formed thereon, means for generating reference signals corresponding to said periodic relative movement, photoelectric receiving means positioned for receiving light from said grating structure corresponding to the image thereon, said photoelectric receiving means producing electrical rotating field signals, a control circuit connected for receiving said reference signals and said electrical rotating field signals for producing control signals indicative of the movement of said object with respect to a direction of movement at least approximately parallel to said relative movement, and a bidirectional counter connected to receive said control signals for indicating the movement of said object. A method for measuring object movement is also disclosed.

REFERENCES:
patent: 3902036 (1975-08-01), Zaleckas
patent: 3989378 (1976-11-01), Heitmann et al.

Affiliated with

Also associated with

Rating

Object measuring method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Object measuring method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Object measuring method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-616247