Title:
PHOTO-DETECTING TUBE
Document Type and Number:
Japanese Patent JPH11102658
Kind Code:
A
Abstract:
To provide a photo-detecting tube which selectively detects only the light of wavelength near 360 nm.
A photo-detecting tube 1 is provided with an incidence window 3 and a photocathode 5, the incidence window 3 is made of covar glass, and the photocathode 5 is made of GaN. The covar glass selectively transmits the light of wavelength ≥ about 290 nm, and the GaN selectively and photoelectrically converts the light of wavelength ≤ about 430 nm. Thus, in the photo-detecting tube, the peak of detecting sensitivity lies in wavelength 360 nm, and only the light of wavelength 360 ± about 70 nm can be selectively detected without an optical band-pass filter.
Inventors:
SUZUKI SHINJI
ISOBE YUKIHIRO
OKANO KAZUYOSHI
KUME HIDEHIRO
ISOBE YUKIHIRO
OKANO KAZUYOSHI
KUME HIDEHIRO
Application Number:
JP26019797A
Publication Date:
April 13, 1999
Filing Date:
September 25, 1997
Export Citation:
Assignee:
HAMAMATSU PHOTONICS KK
International Classes:
H01J1/34; H01J40/06; H01J43/28; (IPC1-7): H01J43/28; H01J1/34; H01J40/06
Attorney, Agent or Firm:
Yoshiki Hasegawa (3 outside)