Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1998-07-24
1999-07-13
Kim, Robert H.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356399, 356400, G01B 902
Patent
active
059234261
ABSTRACT:
Opposite wedge plates having identical non-parallel surfaces are joined to provide an optical element which will receive a portion (e.g. one-half) of an collimated input light beam, and project the side-by-side interference patterns directly onto a viewing screen to check for collimation of the beam. The instrument incorporates a rectangular, preferably cube shaped, housing having an input window in one side of the housing for admission of the beam being investigated, and a viewing window in another side located at right angles to the input window. A viewing screen (such as a diffusing plate) is fitted into or supported in the viewing window. The optical element is supported in and across the housing extending at forty-five degrees to the input window, from a corner adjacent the viewing window to an opposite corner. The optical element comprises a matched pair of optical wedge plates having the same wedge angle and being supported side-by-side with their wedge directions opposite. The wedge plates are fabricated by splitting a source plate across the direction of the interference fringes of the source plate and rejoining the resulting pair of wedge plates with their wedge directions opposite.
REFERENCES:
patent: 4304464 (1981-12-01), Hiu et al.
patent: 4541720 (1985-09-01), Hausler et al.
patent: 4662750 (1987-05-01), Barger
patent: 5426503 (1995-06-01), Kusunose
Kim Robert H.
Mirage Development Ltd.
Nauman Joseph G.
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