Arrangement for measuring the absorption of transparent specimen

Details Arrangement for measuring the absorption of transparent specimen Arrangement for measuring the absorption of transparent specimen

1991-05-22

1992-11-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250228, 356236, 356328, 356319, H01J 516

Patent

active

051645866

ABSTRACT:
The invention is directed to an arrangement for measuring the absorption of a transparent specimen. The arrangement includes: a radiation source for supplying radiation; a radiation-integrating device defining a space enclosed by a wall having a reflective surface for multiply reflecting the radiation substantially uniformly throughout the space to diffusely illuminate the transparent specimen whereby diffused radiation passes through the transparent specimen; a photometric measuring unit for measuring the radiation passed through the specimen; and, a mount for mounting the specimen between the reflective surface and the measuring unit. The arrangement of the invention enables the absorption of transparent specimens to be measured which have unfavorable outer forms such as where the specimen contains no surfaces which are mutually parallel.

REFERENCES:
patent: 3944368 (1976-03-01), Beesley
patent: 4093991 (1978-06-01), Christie, Jr. et al.
patent: 4120582 (1978-10-01), De Vries et al.
patent: 4232971 (1980-11-01), Suga
patent: 4259011 (1981-03-01), Crumm et al.
patent: 4598715 (1986-07-01), Machler et al.
patent: 4802763 (1989-02-01), Gerlinger et al.
patent: 4892409 (1990-01-01), Smith
patent: 4900923 (1990-02-01), Gerlinger
patent: 4965454 (1990-10-01), Yamauchi et al.
Article by E. Wendland entitled "Messung der diffusen Reflection mit der Ulbricht-Kugel" published in GIT Fachz. Lab., vol. 9, 1988, pp. 993 to 997.

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