Infrared densitometer

Details Infrared densitometer Infrared densitometer

1992-06-26

1993-11-09

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250339, 250345, 356319, 356321, 356323, 356325, G01N 2159

Patent

active

052605744

ABSTRACT:
A high resolution infrared densitometer system is described which comprises an intense thermal light source, an optical system for projecting first and second images of the light source along respective parallel first sample and second reference optical axes, adjustable optical attenuators for selectively balancing the light intensity of the images projected along the sample and reference axes at selected optical density, a spectrometer for filtering background radiation from the projected images except for a selected wavelength, and a detector for measuring intensities of the filtered projected images. A method for making optical density measurements is described.

REFERENCES:
patent: 3062088 (1962-11-01), Bolz
patent: 4553033 (1985-11-01), Hubble, III et al.
patent: 4796065 (1989-01-01), Kanbayashi
patent: 4937637 (1990-06-01), Magistro
patent: 4989985 (1991-02-01), Hubble, III et al.
"Dual Beam Recording U.V.-Visible Ultra-Microspectrophotometer and Scanning Microdensitometer," Pamphlet from Canalco, Canal Industrial Corporation of Bethesda, Md., 4 pages. Undated, but prior to receipt in Office on Oct. 15, 1962.

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