Split V-roof mirror collector having improved collection efficie

Details Split V-roof mirror collector having improved collection efficie Split V-roof mirror collector having improved collection efficie

1990-12-21

1992-04-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022731, 2503272, G01J 100

Patent

active

051050790

ABSTRACT:
A light collector collects and detects light emitted from a photostimulable phosphor medium such as a phosphor sheet in a photostimulable phosphor imaging system. The collector includes a vertical mirror extending the width of the phosphor sheet; and a V-roof mirror having upper and lower mirrors forming an apex facing the vertical mirror. The vertical mirror and V-roof mirror form slots for passing a scanning beam of stimulating radiation through the collector to the surface of the photostimulable phosphor sheet and for admitting emitted light from the phosphor sheet into the collector. The vertical mirror and V-roof mirror form a substantially triangular cross-section which diminishes in size from one edge of the phosphor sheet to the other edge thereof. A photodetector is positioned at the large end of the triangular collector for receiving light emitted from the photostimulable phosphor sheet and for generating an electrical signal in response thereto. A vertical mirror is located below the photodetector to increase collection efficiency. Alternatively, the photodetector is located at an aperture in the vertical mirror and an exit deflector mirror closes off the large end of the V-roof mirror. The photodetector may also be positioned at angles other than 90.degree. to the vertical mirror.

REFERENCES:
patent: Re31847 (1985-03-01), Luckey
patent: 4346295 (1982-08-01), Tanaka et al.
patent: 4629890 (1986-12-01), Goto et al.
patent: 4742225 (1988-05-01), Chan
patent: 4743758 (1988-05-01), Chan et al.
patent: 4743759 (1988-05-01), Boutet
patent: 4833325 (1989-05-01), Torii et al.
patent: 4867530 (1989-09-01), Sedlmayr

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