Diffraction grating for optical scanning

Details Diffraction grating for optical scanning Diffraction grating for optical scanning

1991-06-12

1992-02-25

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359565, 359569, 359574, 359575, G02B 518, G02B 2610, G02B 2744

Patent

active

050917986

ABSTRACT:
A diffraction grating comprises the plurality of grating rings provided at positions such that their radii r are selected so that a function .phi.(r) of r satisfies the following differential equation and initial conditions, ##EQU1## where .lambda. is the wavelength of a scanning light beam, f is the focal length of the diffraction grating, r is the radius from the center of diffraction grating, M is the distance from the diffraction grating to a scanning surface expressed as a multiple of the focal length f, and moreover the relation

REFERENCES:
patent: 4832464 (1989-05-01), Kato et al.

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