Title:
PHOTOSENSOR
Document Type and Number:
Japanese Patent JPH04113235
Kind Code:
A
Abstract:
PURPOSE:To eliminate nonuniformity in spectral sensitivity between photosensors by adjusting an angle of incidence of a light beam entering an interference filter. CONSTITUTION:An optical filter F1 (band-pass filter) is combined with a photoelectric conversion element SPD and they are selected so that an aimed sensitivity characteristic be presented practically. An interference filter F2 (long- wavelength cut filter) is provided for correcting the sensitivity characteristic on the long wavelength side of the overall spectral characteristics of a photosensor and fitted in inclination to the optical axis. By adjusting an angle theta1 of inclination thereof, a cut wavelength is varied and thereby correction on the long-wavelength side of the overall spectral characteristics is conducted. As for an interference filter (short-wavelength cut filter) F3, an angle theta2 of inclination in fitting thereof is adjusted in the same way as F2 and thereby the short wavelength side of the overall spectral characteristics is corrected.
Inventors:
INABA MASAHITO
SUGIYAMA MASAMI
SUGIYAMA MASAMI
Application Number:
JP23486490A
Publication Date:
April 14, 1992
Filing Date:
September 04, 1990
Export Citation:
Assignee:
MINOLTA CAMERA KK
International Classes:
G01J3/26; G01J1/04; G01J3/51; G02B5/28; G02B7/00; G01J1/42; G01J3/12; (IPC1-7): G01J1/04; G01J3/26; G01J3/51
Domestic Patent References:
| JPS5827735U | 1983-02-22 | |||
| JPH0296110A | 1990-04-06 | |||
| JPS63147135A | 1988-06-20 | |||
| JPS63191033A | 1988-08-08 | |||
| JPS5975134A | 1984-04-27 | |||
| JPH0261524A | 1990-03-01 |
Attorney, Agent or Firm:
Prefecture Kosuke
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