Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1990-04-04
1993-02-16
Psitos, Aristotelis
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 15, 359 17, 369112, 369103, 235454, 235457, G02F 113
Patent
active
051876000
ABSTRACT:
An optical beam scanning apparatus including a semiconductor laser, a first lens which converts a divergent beam to a parallel beam, a liquid crystal display for two-dimensionally modulating the intensity of the parallel beam and having a matrix of vertical and horizontal electrodes which constitute modulating elements at the crossings of the electrodes, a second lens which converges the parallel beam incident thereon to a focal point of the second lens system, a spatial optical modulator located at the focal point of the second lens system to convert the converged beam to a parallel wave, and a third lens which produces a beam spot from the parallel wave incident thereon at a focal point of the third lens.
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Citizen Watch Co. Ltd.
Huber Paul W.
Psitos Aristotelis
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