JPS62299721A - Photodetector - Google Patents

Photodetector

Info

Publication number
JPS62299721A
JPS62299721A JP14394086A JP14394086A JPS62299721A JP S62299721 A JPS62299721 A JP S62299721A JP 14394086 A JP14394086 A JP 14394086A JP 14394086 A JP14394086 A JP 14394086A JP S62299721 A JPS62299721 A JP S62299721A
Authority
JP
Japan
Prior art keywords
photoelectrons
electrodes
emitted
currents
electron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14394086A
Inventor
Kikuo Mita
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14394086A priority Critical patent/JPS62299721A/en
Publication of JPS62299721A publication Critical patent/JPS62299721A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To accurately obtain a spot irradiation position in a short time with simple constitution by forming images of photoelectrons emitted by a photoelectric film through an electron lens and multiplying the electron images by a microchannel plate (MCP).
CONSTITUTION: When the photoelectric film 11 is irradiated with spot light, photoelectrons are emitted on the reverse surface of the film 11. Photoelectrons are accelerated by the electron lens 12 to form electron images on the front-side surface of the MCP13. The photoelectrons are multiplied when passing through thin holes constituting the MCP13 and strike on a resistance body 14 when emitted from the reverse surface, so that currents begin to flow out of electrons 15 and 16. Resistances ra and rb are present between the electrodes 15 and 16 and the currents Ia and Ib flowing of the electrodes 15 and 16 are so determined as to be Ia/Ib=la/lb, where la and lb are the distances between a point SP and the electrodes. For the purpose, the ratio of currents flowing from terminals 17 and 18 to a signal processor 19 is computed to easily know the position of the SP as a value lb.
COPYRIGHT: (C)1987,JPO&Japio
JP14394086A 1986-06-19 1986-06-19 Photodetector Pending JPS62299721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14394086A JPS62299721A (en) 1986-06-19 1986-06-19 Photodetector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14394086A JPS62299721A (en) 1986-06-19 1986-06-19 Photodetector

Publications (1)

Publication Number Publication Date
JPS62299721A true JPS62299721A (en) 1987-12-26

Family

ID=15350600

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14394086A Pending JPS62299721A (en) 1986-06-19 1986-06-19 Photodetector

Country Status (1)

Country Link
JP (1) JPS62299721A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016537638A (en) * 2013-08-19 2016-12-01 ビーエーエスエフ ソシエタス・ヨーロピアBasf Se Optical detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016537638A (en) * 2013-08-19 2016-12-01 ビーエーエスエフ ソシエタス・ヨーロピアBasf Se Optical detector

Similar Documents

Publication Publication Date Title
EP0202637A3 (en) Uv photocathode
JPS52119178A (en) Electron beam exposure device
JPS5568056A (en) X-ray tube
JPH02226635A (en) Field emission type electron source
JPS59228776A (en) Semiconductor hetero-junction element
JPH0436922A (en) Electron emitting element and manufacture of the same
JPH02278326A (en) Information input/output device
JPS5283177A (en) Electron beam exposure device
EP1048939A4 (en) Imaging apparatus
JPS59111237A (en) Cathode ray tube device
CN101238541A (en) Microchannel plate, gas proportional counter and imaging device
Lodge et al. A cross-field photomultiplier with sub-nanosecond risetime suitable for nuclear studies
JPH03205744A (en) Shadow mask type color picture tube
JPS639807A (en) Method and device for measuring film thickness
JPH03155036A (en) Photomultiplier
JPS6244946A (en) Detector for charged particle and the like
JPS55119006A (en) Displacement measuring instrument
JPS63304551A (en) Image pickup tube and its working method
JPH03116718A (en) Mask image system using electron beam from extended electron source
JPS5774948A (en) Electron gun
JPS57100419A (en) Data imprinting device of camera
JPS5411689A (en) Light emitting element of gallium phosphide
JPS5772072A (en) Voltage measuring device
EP0316860A3 (en) Pulsed optical source
JPS61218100A (en) X-ray tube and x-ray photographing device utilizing same