G - Physics – 09 – F
Patent
G - Physics
09
F
G09F 9/35 (2006.01) G02B 3/00 (2006.01) G02F 1/1335 (2006.01) G03B 21/00 (2006.01) H04N 5/74 (2006.01) H04N 9/31 (2006.01) G02F 1/137 (2006.01)
Patent
CA 2056313
A liquid crystal device for controlling scattering of light beams made incident upon a plurality of portions of a liquid crystal layer thereof so as to modulate the light beams, the liquid crystal device including: a first lens array having lenses disposed to correspond to the portions of the liquid crystal layer, the lenses causing the light beams transmitted from the corresponding portions of the liquid crystal layer to travel toward a focal plane; a mask for shielding scattered light transmitted from the first lens array and as well as allowing non-scattered light to pass through, the mask having a plurality of aperture portions which are formed along the focal plane to correspond to the lenses of the first lens array so as to allow non-scattered light transmitted from corresponding lenses to pass through; and a second lens array having lenses arranged to correspond to the aperture portions of the mask, the lenses substantially collimating the non-scattered light transmitted from corresponding aperture portions of the mask.
L'invention est un dispositif à cristaux liquides servant à contrôler la diffusion des faisceaux lumineux incidents sur une pluralité de portions d'une couche de cristaux liquides pour moduler ces faisceaux. Ce dispositif à cristaux liquides comprend : un premier réseau de lentilles disposées de façon à correspondre aux portions en cause de la couche de cristaux liquides, ces lentilles transmettant à un plan focal les faisceaux lumineux émanant des portions correspondantes de la couche de cristaux liquides, un masque servant à bloquer les faisceaux diffusés par le premier réseau de lentilles et à transmettre la lumière non diffusée, ce masque comportant une pluralité d'ouvertures formées le long du plan focal de façon à correspondre aux lentilles du premier réseau de lentilles pour laisser passer la lumière non diffusée transmise par les lentilles correspondantes, et un second réseau de lentilles disposées de façon à correspondre aux ouvertures du masque, ces lentilles servant essentiellement à collimater la lumière non diffusée transmise par les ouvertures correspondantes du masque.
Kurematsu Katsumi
Minoura Nobuo
Mitsutake Hideaki
Suzuki Hidetoshi
Yoshinaga Kazuo
Canon Kabushiki Kaisha
Ridout & Maybee Llp
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