IMPROVEMENTS IN OR RELATING TO THE MANUFACTURE OF

专利名称：IMPROVEMENTS IN OR RELATING TO THE

MANUFACTURE OF ZONE PLATES

发明人：HUTLEY, Michael, Christopher申请号：EP83902433.0申请日：19830728公开号：EP0116573A1公开日：19840829

摘要： The use of zone plates was limited by low yield and pronounced chromaticaberration. The increasing use of lasers reduces the disadvantage of chromaticaberration; outbreaks zone plates have better performance but are difficult to

manufacture. In the method of the present invention, a Fabry-Pérot interferometer (28)which can produce an image with concentric fringe finesse, and is made in an adjustablemanner so that the image can be enlarged (or reduced), characteristically on a range of aspacing of a fringe. The image is projected onto a layer (12) of a photoprotective lacqueron a suitable substrate (10). While the image is enlarged on a spacing of a fringe, the lightintensity in the image varies, so that when the photoprotective lacquer (12) is expanded,the radial section between two positions of any fringes takes the form a wedge (18) whichis that required by a spike zone plate. An appropriate chemical treatment can extend thewedge shape to the entire substrate or part of it. A yield of about 60% can be obtained.

申请人：The Secretary of State for Industry in Her Britannic Majesty's Government ofthe United Kingdom of Great Britain and

地址：Northern Ireland 1 Victoria Street London SW1H 0ET GB

国籍：GB

代理机构：Beckham, Robert William, et al

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