Optical system in a lasar scanning eye fundus camera
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 2, 1990
Grant Date -
N/A
app pub date -
Jun 27, 1988
filing date -
Jul 15, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to the optical system in a laser scanning eye fundus camera. The optical system comprises: an illuminating optical system for scanning an eye fundus with an illuminating laser light beam from a light source using a light scanning device; a light receiving optical system for directing the reflected light from the eye fundus to a light receiver unit; and a beam diameter adjusting means associated with said optical systems for adjusting the beam diameter of the laser beam or of the light for observation. Such arrangement according to the present invention allows to adjust the depth of field by adjusting the aperture diameter of the optical system by means of the beam diameter adjusting means so that test or inspection of even or uniform quality can be ensured for all subject in spite of variations in their age, experience of medical or opthalmological tests or inspections, or structure of the eye fundus.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully