Reflectance measuring apparatus including a cylinder-shaped ligh

Details Reflectance measuring apparatus including a cylinder-shaped ligh Reflectance measuring apparatus including a cylinder-shaped ligh

1989-05-30

1990-02-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356236, G01T 100

Patent

active

049009230

ABSTRACT:
The invention is directed to a reflectance measuring apparatus having a predetermined aperture for the receiving optic. A light-conducting device arranged between the measuring aperture and the specimen enlarges the effective measuring surface of the latter so that even specimens having a large surface structure can be measured without difficulty.

REFERENCES:
patent: 2358020 (1940-08-01), Miller
patent: 4453180 (1984-06-01), Juergensen
patent: 4523853 (1985-06-01), Rosenbladt et al.
patent: 4651262 (1987-03-01), Piironen
J. Phys. E: Sci. Instrum., vol. 18, 1985, H. H. Schlemmer and M. Machler "Diode Array Spectrometer: an Optimised Design" pp. 914 to 919.

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