Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1990-01-10
1990-11-27
Arnold, Bruce Y.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
250331, 350342, 350354, G02F 1135, H01L 2714
Patent
active
049731360
ABSTRACT:
A reflective matrix mirror visible to infrared converter light valve (5) includes a liquid crystal medium (60) for spatially modulating an incident infrared beam by polarization rotation, a photosubstrate (30) for receiving an incident visible wavelength image (115) and for controlling the polarization rotation of the liquid crystal medium (60) responsively to the visible image (115), and a reflective matrix mirror (40). The reflective matrix mirror (40) is positioned between the liquid crystal medium (60) and the photosubstrate (30) and reflects the incident infrared beam (125) back through the liquid crystal medium (60) such that the infrared beam (125) passes through the liquid crystal medium twice and is polarization rotated responsively to the visible wavelength image (115). A polarizer (90) positioned exteriorly of the liquid crystal medium (60) converts the polarization rotation of the infrared beam (125) into output intensity modulation to produce an infrared image (130). The reflective matrix mirror (40) comprises an M.times.N array of infrared reflective islands comprising metallic or semiconductor/metallic compounds. The reflective matrix mirror (40) can be formed by depositing reflective material on a layer of silicon dioxide in a grid pattern using a masking technique. Alternatively, the silicon dioxide may be etched to provide an M.times.N array of depressions which are then used as deposition sites for the reflective material. In this later embodiment, the reflective material may be in contact with photosubstrate (30) so as to form Schottky Barrier contacts.
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Arnold Bruce Y.
Coble P. M.
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
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