Patent ID: 6448546
Filing Date: 2002-09-10
Classification: G01J

Abstract:
An integrating photodetection system for integrating light incident to a photosensor to detect a quantity of the incident light,said integrating photodetection system comprising a main body unit which has a first terminal, and a head unit which has a second terminal capable of being attached to and detached from said first terminal and which is attachable to and detachable from said main body unit, said head unit comprising said photosensor which is connected to said second terminal and which generates photocurrent according to said quantity of the incident light, and a capacitor which is connected to the photosensor, said main body unit comprising a charging circuit which is connected to said first terminal and which can charge said capacitor while said first terminal is coupled to said second terminal, and a reading circuit which can read a voltage of said capacitor out while said first terminal is coupled to said second terminal, wherein said capacitor is discharged as said photocurrent is generated, said photosensor is an electron tube comprising a photocathode which emits photoelectrons according to incidence of the light, and a target of said photoelectrons, and said capacitor is positioned outside of said photosensor and is electrically connected to said photocathode and said target.