Measurement apparatus employing radiation

Details Measurement apparatus employing radiation Measurement apparatus employing radiation

1987-11-24

1989-12-05

Howell, Janice A.

X-ray or gamma ray systems or devices

Specific application

Absorption

378 51, 25036301, 356436, G01N 2306

Patent

active

048857599

ABSTRACT:
A measuring apparatus for measuring a physical property of a substance using radiation has a source of radiation for irradiating the substance, a radiation detector which is disposed on the opposite side of the substance from the radiation source, a mask for allowing radiaton to enter the radiation detector only along n prescribed pathways, and a signal processing and calculating device for calculating the physical property of the substance based on the radiation which is incident upon the radiation detector. The mask has n different mask patterns each comprising a plurality of pattern elements which allow the passage of radiation and which can be positioned between the substance and the radiation detector in alignment with the radiation pathways.

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