Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1985-10-11
1989-06-27
Corbin, John K.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350 383, 356328, 356334, G01J 318, G02B 532, G03H 104
Patent
active
048423530
ABSTRACT:
A method of making a corrected plane holographic grating within one band of wavelengths, intended for use in a diffraction apparatus in which light emitted by an entry source (1) is collimated by a spherical mirror (2) to the grating (4), which reflects parallel pencils to another spherical mirror (7), a focusing mirror, is disclosed. An auxiliary holographic grating (25) is created by the interference on a spherical surface (15) of a parallel pencil of light produced by the spherical mirror (7) subsequent to reflection onto a plane mirror (12) and of a divergent pencil deriving from the center of the surface (15). The auxiliary grating, corrected by the interference on a plane surface (22) of a parallel pencil produced by the spherical mirror (2) and of another parallel pencil produced by the auxiliary grating (25) illuminated from the center of the spherical surface, is then recorded.
REFERENCES:
patent: 4378142 (1983-03-01), Ono
patent: 4432597 (1984-02-01), Bjorklund et al.
Cordelle, J., et al., "Aberration-Corrected Concave Gratings Made Holographically," Optical Instruments and Techniques 1969, J. Home Dickson, ed., Oriel Press Ltd., Newcastle, U.K., pp. 117-124.
(S1665004) Chipman, R. A., "Monochromator Designs With Aberration Corrected Gratings,"
Corbin John K.
Edmondson David J.
Instruments S.A.
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