Title:
OPHTHALMIC PHOTOGRAPHING DEVICE
Document Type and Number:
Japanese Patent JP3221717
Kind Code:
B2
Abstract:
PURPOSE: To eliminate a time lag at the time of switching from an observation of an eye to be examined to photographing, and to realize a long service life of a light source by setting luminance of the light source radiated to the eye to be examined to a photographing light quantity level from an observation light quantity level, in the case at least one of an alignment of the eye to be examined or focusing is within a certain adaptive range at the time of observing the eye to be examined.
CONSTITUTION: When a controller 45 detects a fact that a split index image for confirming a focused state goes in an adaptive range of an eye E to be examined, level-up of the light emission quantity of an observation/ photographing shared light source L1 is started, and also, it is started that an ND filter 13a goes into an optical path. Subsequently, when it is finished that the ND filter 13a goes into the optical path, the light emission quantity of the observation/photographing shared light source L1 becomes a photographing light quantity. In such a way, at the time of switching from an observation of an eye to be examined to photographing, a time lag is not generated, power consumption is saved and it can be prevented that a service life of a light source is shortened.
Inventors:
Kazumasa Hayashi
Yoshihiro Suzuki
Yoshihiro Suzuki
Application Number:
JP8533492A
Publication Date:
October 22, 2001
Filing Date:
April 07, 1992
Export Citation:
Assignee:
Topcon Co., Ltd.
International Classes:
A61B3/14; (IPC1-7): A61B3/14
Domestic Patent References:
| JP51146823A | ||||
| JP1300927A | ||||
| JP5412195A | ||||
| JP61288825A | ||||
| JP58195539A | ||||
| JP39730B2 |
Attorney, Agent or Firm:
Tamio Nishiwaki