Title:
DUPLEX OPTICAL SPACE TRANSMITTER
Document Type and Number:
Japanese Patent JP3206993
Kind Code:
B2
Abstract:
PURPOSE: To provide a duplex optical space transmitter in which a highly precise following-up mechanism can be realized in a light emitting element whose radiant intensity is not uniform.
CONSTITUTION: A beam splitter 23, mirror angle driving mechanism part 24, and transmitting and receiving lens 25 are arrayed on the optical path of a light transmitting part 21 to which a transmission signal S1 and a pilot signal Ps are inputted, and a partial reflecting mirror 26 and a light receiving part 28 are arrayed in the reflecting direction of the beam splitter 23. An angle error detecting part 30 is provided at the reflecting direction of the partial reflecting mirror 26, and the output of the angle error detecting part 30 is connected through a mirror driving control part 31 with a mirror angle driving mechanism part 24. At that time, the angle error of a transmission beam optical axis can be reduced by limiting the upper limit value and lower limit value of an optical system for fetching the received light in the angle error detecting part 30.
Inventors:
Yasusaburo Izukura
Tetsuo Sakanaka
Tetsuo Sakanaka
Application Number:
JP31568092A
Publication Date:
September 10, 2001
Filing Date:
October 30, 1992
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/00; G01S3/786; H04B10/00; H04B10/079; H04B10/11; H04B10/112; (IPC1-7): H04B10/105; G02B7/00; H04B10/10; H04B10/22
Domestic Patent References:
| JP1236834A | ||||
| JP2186311A | ||||
| JP4119022A |
Attorney, Agent or Firm:
Yukihiko Hibiya