Patents Assigned to TOA Rikagaku Co., Ltd.
  • Patent number: 5664244
    Abstract: A viewfinder device has an objective lens element (2) disposed on a viewfinder light path and an eyepiece lens element (3, 28) disposed behind the objective lens element. An image (10) of an object (7) is observable at an eye point (EP). At least one indicia portion (4, 12, 13, 20, 25, 35, 36, 40a, 40b) is disposed in front of the eyepiece lens element, for indicating information related to a taking field. At least one micro lens (5, 5a, 5b, 6a, 6b, 9a, 9b, 14, 17, 22, 30, 32a, 32b) has positive power, is disposed behind the indicia portion, renders an image of the indicia portion observable, and meets0.5.ltoreq.2e.multidot.tan .theta..ltoreq.2.5where e is a distance from the micro lens to the eye point, and .theta. is a half of an angle defined by a convex surface of the micro lens as viewed from the eye point.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: September 2, 1997
    Assignees: Fuji Photo Film Co., Ltd., TOA Rikagaku Co., Ltd.
    Inventors: Takeyuki Yamamura, Takashi Mizuguchi, Nobushige Kobayashi, Kazumi Koike