Optical: systems and elements – Diffraction – From grating
Patent
1993-02-26
1994-06-21
Lerner, Martin
Optical: systems and elements
Diffraction
From grating
359569, 359576, 359585, 359590, 427162, G02B 518, G02B 528, G02B 2744
Patent
active
053232666
ABSTRACT:
A two-metal grating is produced by vacuum depositing a first dielectric cing upon a separation layer formed upon a mandrel; then depositing a first optically opaque metallic layer, etching the layer to form stripes; then vacuum depositing a second optically opaque film; then electroforming a backing structure and separating the dielectric coating from the separation layer on the mandrel to form a free-standing grating structure having a smooth surface. This structure can then be affixed to a metallic mirror. A buried phase grating can also be fabricated by additionally depositing a second dielectric layer and a third metallic layer.
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Flint Graham W.
Tuenge Stephen R.
Lerner Martin
Nathans Robert L.
United States of America as represented by the Secretary of the
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