Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1989-08-10
1991-02-12
Arnold, Bruce Y.
Optics: measuring and testing
Range or remote distance finding
With photodetection
35016223, 356328, 356334, G02B 518
Patent
active
049919342
ABSTRACT:
An optical system and method comprising a diffraction grating which consists of diffracting elements spaced from one another by unequal distances. Correction of residual defocusing in the image produced by such a grating is accomplished by translating it along its surface. As one embodiment, a monochromator is constructed on which a self-focusing grating scans the value in wavelength which is transmitted between fixed slits by rotation of the grating about an axis fixed in space. Combined with a translation of the grating along its surface, such a monochromator produces a symmetrical image exactly in focus at the exit slit for all scanned wavelengths.
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Arnold Bruce Y.
Ryan J. P.
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