Title:
LIGHTING DEVICE
Document Type and Number:
Japanese Patent JP3148355
Kind Code:
B2
Abstract:
PURPOSE: To provide the compact, small-sized lighting device of simple constitution which eliminates a deviation in lighting place from an observation place even if a lighting angle is varied.
CONSTITUTION: The lighting device is equipped with an objective 3 which faces an object 1 to be observed, a movable condenser lens 11 which converges the illumination luminous flux from an illumination light source, and a lighting angle varying optical member 7 which converges the illumination luminous flux to irradiate the observation place 1a while varying the irradiation angle of the illumination luminous flux to the object 1 to be observed as the condenser lens 11 moves in a state wherein the distance L from the object 1 to be observed is set constant so as to vary the lighting angle while the lighting place is prevented from deviating from the observation place 1a of the object to be observed.
Inventors:
Ikuo Noguchi
Toru Kobayashi
Toru Kobayashi
Application Number:
JP12908192A
Publication Date:
March 19, 2001
Filing Date:
May 21, 1992
Export Citation:
Assignee:
Topcon Co., Ltd.
International Classes:
G02B21/06; (IPC1-7): G02B21/06
Domestic Patent References:
| JP55115014A | ||||
| JP6161114A |
Attorney, Agent or Firm:
Tamio Nishiwaki