Apparatus for measuring the refractive power of an optical syste

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

356126, A61B 310

Patent

active

045264511

ABSTRACT:
An apparatus in which an optical system to be examined is periodically scanned by a slit-like illuminating light beam and the light beam from the optical system is received by two pairs of photoelectric converters and the refractive power of the optical system is measured on the basis of the phase difference between the output signals of the photoelectric converters forming each of said pairs includes projection means capable of alternatively scanning the illuminating light beam from two known directions, output means adapted to put out a discrimination signal of the scanning direction of the illuminating light beam, and operational means for receiving the discrimination signal and the phase difference as inputs and obtaining a refractive power.

REFERENCES:
patent: 3136839 (1964-06-01), Safir
patent: 3715166 (1973-02-01), Leighty et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for measuring the refractive power of an optical syste does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for measuring the refractive power of an optical syste, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for measuring the refractive power of an optical syste will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-378360

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.