Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1986-01-22
1989-07-18
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351206, 351205, A61B 310
Patent
active
048488950
ABSTRACT:
There is disclosed an automatic eye refractive power measuring apparatus for automatically measuring refractive power of an eye under test by means of objective measurement. It comprises a projection system for projecting a measuring target image to a retina of the eye under test by invisible light; an imaging optical system for imaging a reflection image of the measuring target image projected to the retina and reflected by the retina; an opto-electric detector having a photosensitive surface disposed at imaging position and adapted to output electrical signal corresponding to the measuring target image formed on the photosensitive surface; display device for displaying the measuring target image reflected on the retina based on the electrical signal as a visible image; and an auto-measuring portion adapted to detect focussing state of the measuring target image projected to the retina based on the electrical signal and automatically calculated refractive power of the eye under test from the electrical signal.
REFERENCES:
patent: 4277150 (1981-07-01), Wada et al.
patent: 4591247 (1986-05-01), Kamiya et al.
patent: 4626089 (1986-12-01), Takahashi et al.
patent: 4676612 (1987-06-01), Wada et al.
patent: 4755041 (1988-07-01), Ishikawa et al.
Horiguchi Kiwami
Kato Yasuo
Kitao Ikuo
Wada Shinji
Bovernick Rodney B.
Dzierzynski P. M.
Tokyo Kogaku Kikai Kabushiki Kaisha
LandOfFree
Automatic eye refractive power measuring 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 Automatic eye refractive power measuring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic eye refractive power measuring apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-168144