Light photon detecting apparatus

Details Light photon detecting apparatus Light photon detecting apparatus

1989-05-10

1992-04-28

McGraw, Vincent P.

Optics: measuring and testing

Photometers

Photoelectric

250239, 250361C, 422 52, 435808, G01N 2176

Patent

active

051081750

ABSTRACT:
Light photon detecting apparatus (10) comprises a photomultiplier tube (36) in a two-part housing (14), the underside (22) of which is open. The underside (22) is fitted with an elastomeric sealing ring (28) to make an airtight and hence light-tight seal with a surface (12). Two spring-loaded part (16, 18) of the housing (14) act as a pump to produce a partial vacuum which opens a shutter (60) to expose the photomultiplier tube (36).

REFERENCES:
patent: 3940250 (1976-02-01), Plakas et al.
patent: 3950646 (1976-04-01), Whitlock
patent: 3998592 (1976-12-01), Pyle
patent: 4841149 (1989-06-01), Martin et al.

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