Diffractoid grating configuration for X-ray and ultraviolet focu

Details Diffractoid grating configuration for X-ray and ultraviolet focu Diffractoid grating configuration for X-ray and ultraviolet focu

1978-09-18

1980-03-11

Church, Craig E.

Radiant energy

Ionic separation or analysis

With sample supply means

250277CH, 350162R, 356334, G01N 2320, G21K 106

Patent

active

041929942

ABSTRACT:
There is disclosed herein an aspheric grating which is operable to image local or distant point sources sharply in a designated wavelength, i.e. produce a perfectly stigmatic image in the given wavelength at grazing angles of incidence. The grating surface comprises a surface of revolution defined by a curve which does not have a constant radius of curvature but is defined by a non-linear differential equation specified in terms of the diffraction condition expressed as (m.lambda./.sigma.).sup.2 =A>O where m is the diffraction order, .lambda. is the wavelength and .sigma. is the grating surface ruling interval.

REFERENCES:
patent: 3639759 (1972-02-01), Goshi et al.
patent: 4024391 (1977-05-01), Bosserman et al.
patent: 4063818 (1977-12-01), Lepere

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