Title:
PHOTOSENSOR
Document Type and Number:
Japanese Patent JPH0755561
Kind Code:
A
Abstract:
PURPOSE: To provide a photosensor in which an S/N ratio can be improved with a simple structure in the photosensor for detecting a narrow band light while the senser is moving.
CONSTITUTION: A detecting position of a photodetector 5 is controlled by rotatably holding an interference filter 3 so provided as to cut a light having an unnecessary band between a condensing lens 2 and the photodetector 5 in a frame 6 fixed to the photodetector 5, driving a piezoelectric element 7 provided between the frame 6 and the filter 3 according to a drive signal from a driving circuit 8 thereby to rotate the filter 3, providing an angle to the photodetector 5, and refracting an incident light.
Inventors:
HIKITA SOICHIRO
AWAMOTO KENJI
MIYAMOTO YOSHIHIRO
AWAMOTO KENJI
MIYAMOTO YOSHIHIRO
Application Number:
JP20074393A
Publication Date:
March 03, 1995
Filing Date:
August 12, 1993
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
G01J1/02; G01J1/04; (IPC1-7): G01J1/04; G01J1/02
Attorney, Agent or Firm:
Tadahiko Ito
Next Patent: SPECTROSCOPE WITH STRAY LIGHT REMOVING FUNCTION