Optical: systems and elements – Holographic system or element – Having optical element between object and recording medium
Patent
1995-08-25
1997-06-17
Henry, Jon W.
Optical: systems and elements
Holographic system or element
Having optical element between object and recording medium
359 35, 430 1, 430 2, 430311, 430397, G03H 104, G03H 122, G02B 2700
Patent
active
056402570
ABSTRACT:
A method for the manufacture of TIR holograms includes the division of an input laser beam into an object beam and a reference beam, the direction of the beams to a holographic recording layer so that the object beam is incident on a surface of the holographic recording layer following transmission through an object mask, so that the reference beam is incident on the other surface of the holographic recording layer at an angle such that following passage through the holographic recording layer it is totally internally reflected back into the holographic recording layer and so that the two beams are superposed at the holographic recording layer, and the displacement of the input laser beam causing the object and reference beams to traverse together the holographic recording layer. The method is especially useful for obtaining a high uniformity of exposure of the holographic recording layer.
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Henry Jon W.
Holtronic Technologies Ltd.
Stanger Leo
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