Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1992-12-10
1994-10-11
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
386359, G01B 902
Patent
active
053552180
ABSTRACT:
A shearing interferometer measures the aberration of a lens by passing a beam through the lens, splitting the beam into plural beams with a slightly wedged plate and causing interference between the wavefronts of the beams. The front and rear optical surfaces of the wedged plate are coated with reflective thin films each having a specific reflectance and transmittance.
REFERENCES:
patent: 4799770 (1989-01-01), Kahn et al.
patent: 4940495 (1990-07-01), Weber et al.
Nippon Sigma Kohki Shiki Kabushiki Kaisha, Plate Beamsplitters Optics and Optical Coatings, C44, C42.
Barnes Thomas H.
Eiji Tomoaki
Kokaji Shigeru
Matsuda Kiyofumi
Agency of Industrial Science and Technology
Ministry of International Trade and Industry
Turner Samuel A.
Wolfe Russell C.
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