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US 4,379,233 AGranted
Optical arrangement for quantitative analysis instrument utilizing pulsed radiation emitting diodes
AssigneeTrebor Industries, Inc.
InventorScott B. Rosenthal
Life of this patent
Estimating the term…
Abstract
An instrument for quantitative analysis using a matrix of radiation emitting diodes has means for assuring that a sample receives substantially uniform radiation from each diode. In the preferred embodiment a lens is used to direct the radiation beams to a focal plane where there is a matte surface diffuser backed with an aperture to provide relatively uniform radiant energy field through the aperture to a sample chamber. With this arrangement the same energy distribution contacts the test samples from each of the radiation sources.
Claims6
An instrument for quantitative analysis of a sample comprising:
- a plurality of pulsed radiation emitting diodes positioned in a matrix to direct radiation to a sample;
- baffles separating the diodes in the matrix;
- narrow bandpass filters positioned adjacent the diodes to allow only preselected wavelengths of radiation to be directed to the sample;
- a sample chamber having at least portions thereof transparent to the radiation from the diodes and bandpass filters;
- lens means positioned adjacent the matrix of diodes and bandpass filters to that radiation from all of the diodes passes through the lens and is bent toward the center of a focal plane adjacent the sample chamber;
- radiation altering means to allow radiation from the lens means to pass to the sample but with uniform energy distribution from each of the diodes;
- photodetecting means for detecting the radiation which passes through a sample in the sample chamber;
- means to calculate and display quantitative analysis based on the output of the photodetecting means.
5 more elements
Dependencies are inferred from the claim text.