Optics: measuring and testing – Blood analysis
Patent
1996-05-16
1997-10-14
Rosenberger, Richard A.
Optics: measuring and testing
Blood analysis
356443, G01N 2184
Patent
active
056777620
ABSTRACT:
An illumination device provides temporally, spatially and angularly stable illumination for microscopic evaluations. An arc lamp serves as the light source. An input optical train gathers and focuses the light through an aperture stop to place an image of the arc incident on an input aperture of a light pipe. The magnification of the arc lamp is chosen to reduce the variation due to occlusion. The light pipe spatially homogenizes the light while preserving the angular integrity. An exit window may be placed over the exit aperture of the light pipe to keep dust and debris out of focus. Another optical train receives the spatially homogenized, angularly preserved light and may focus a many arclet images to fill the pupil of a condenser lens. The condenser lens also may focus the exit aperture of the light pipe onto or near the specimen on a microscope slide. A feedback system samples the light and corrects for residual temporal variations by electronically modifying the image as it leaves a CCD. A neutral density filter controls the overall energy passed through the system.
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Hayenga Jon W.
Ortyn William E.
Piloco Louis R.
Moffa Emil
NeoPath, Inc.
Rosenberger Richard A.
Sun Hans I.
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