Patent ID: 6818885
Filing Date: 2004-11-16
Classification: H01J,H05K

Abstract:
A photodetector comprising:a housing with a light entrance window; a photoelectric tube accommodated in said housing, said photoelectric tube having a light receiving faceplate and a photoelectric surface located on one surface of the light receiving faceplate; a heat conductive supporting member accommodated in said housing, said heat conductive supporting member having a supporting protrusion piece for fixing said photoelectric tube; and a cooling device accommodated in said housing and arranged between said heat conductive supporting member and an inner surface of said housing, said cooling device having a heat radiating portion being in contact with the inner surface of said housing and a heat absorbing portion being in contact with said heat conductive supporting member, wherein the supporting protrusion piece of said heat conductive supporting member has an aperture stop for introducing light to be measured, which is transmitted through the light entrance window of said housing, to the photoelectric surface of said photoelectric tube through the light receiving faceplate of said photoelectric tube, and wherein said photoelectric tube is fixed only to the supporting protrusion piece of said heat conductive supporting member, while the light receiving faceplate of said photoelectric tube is aligned with the aperture stop.