Patents Examined by Daniel R. Malley
  • Patent number: 5331368
    Abstract: A photomicrographic apparatus, which takes a picture of an enlarged image of a specimen observed under a microscope, causes filter insert/remove means to insert a light intensity-reducing filter in the photometric optical path to a light-receiving element when the light-receiving surface illuminance of the light-receiving element exceeds the upper limit of a first photometry enable illuminance range, and makes the filter insert/remove driving means remove the light intensity-reducing filter from the photometric optical path to the light-receiving element when the light-receiving surface illuminance of the light-receiving element drops below the lower limit of a second photometry enable illuminance range.
    Type: Grant
    Filed: April 2, 1993
    Date of Patent: July 19, 1994
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Satoru Oosawa, Motokazu Yamana