Illuminating system of ophthalmological instrument
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United States of America Patent
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Jun 12, 1990
Grant Date -
N/A
app pub date -
Feb 24, 1988
filing date -
Feb 24, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An illuminating system of an ophthalmological instrument has a coaxial illuminating system for effecting a coaxial illumination by projecting an observation-use illuminating light toward an eye to be tested from a direction generally parallel with an optical axis of through an objective lens of an observing optical system, FIGS. 1A and 1B each illustrated an oblique illuminating system branched from the coaxial illuminating system and adapted to effect an oblique illumination by projecting the observation-use illuminating light toward the eye from an oblique direction different from the coaxial illumination, and an optical path switching optical member disposed in an intermediate part of an optical path of the coaxial illuminating system and adapted to switch the coaxial illumination to the oblique illumination or vice versa.
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