Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrophotometer
Patent
1996-08-12
1997-07-29
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrophotometer
356334, G01J 308, G01J 318, G01J 342
Patent
active
056526547
ABSTRACT:
A dual beam spectophotometer is described in which a beamsplitter is at least partially surrounded by a chopper, the combination of which provide sample and reference beams. An oscillating grating produces a monochromatic light beam scans a selected spectral range of wavelengths. The movement of a second chopper and of the oscillating grating is controlled to alternately pass sample and reference spectrums for detection by a detector and to block all radiation. Detected signals are processed for storage by suitable electronics and a computer. The electronics also control the motion of the oscillating grating and chopper. A set of beamsplitters with distinctly different sample-to-reference beam ratios are provided to add versatility to the spectrophotometer.
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Evans F. L.
Franklin Lawrence R.
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