Method of optical density measurement and apparatus therefor

Details Method of optical density measurement and apparatus therefor Method of optical density measurement and apparatus therefor

1988-05-06

1990-06-26

Teska, Kevin J.

Boots, shoes, and leggings

356425, 356432, 364525, 36457101, G01N 2117

Patent

active

049377647

ABSTRACT:
A method of measuring optical density is characterized by the steps of measuring reflected light from a subject being measured a plurality of times during a predetermined interval, and calculating a mean value of the plurality of measured values. For providing the zero point correction data, the known standard optical densities are previously set in the densitometer. A densitometer for practicing the calibrating method is formed compact and handy and comprises a housing in which measuring elements such as a light projecting member, a light receiving member and a reference light detecting member are incorporated. In the housing are further provided circuits for calculating a density based on outputs from the light receiving and reference light detecting members and for battery power checking. The housing includes a transparent panel formed with a measuring aperture by which a measuring area of a subject is defined.

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patent: 4762412 (1988-08-01), Ohkubo et al.

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