Polarized grating optical odometer

Details Polarized grating optical odometer Polarized grating optical odometer

1976-06-18

1977-08-09

Buczinski, S.C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

250226, G01P 336

Patent

active

040407411

ABSTRACT:
An optical system for measuring relative lateral displacement or velocity relative to a surface above which the system is independently supported has a grating consisting of different bands that are adapted to impart to incident light received from the surface two different optically selective characteristics such as different polarizations or different wavelengths. Light transmitted by or reflected from the bands is focussed through filtering means onto photodetectors which produce signals proportional to the light received thereby. The filtering means (polarization selective or wavelength selective, as the case may be) associated with the respective photodetectors respectively separate light coming from bands having one of said characteristics from light from the bands having the other of said characteristics. The signals from the photodetectors are applied to a differential amplifier which produces an output signal representing the difference between the photodetector signals and which thus has a frequency representing the speed or movement of the system relative to the surface. This output signal may then be applied to known frequency counting devices for indicating velocity or distance travelled from a zero position.

REFERENCES:
patent: 3533702 (1970-10-01), Hock et al.
patent: 3781110 (1973-12-01), Leitz et al.

Affiliated with

Also associated with

Rating

Polarized grating optical odometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1225084