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公开(公告)号：EP1095299A1
公开(公告)日：2001-05-02
申请号：EP99932340.5
申请日：1999-07-07
申请人： Digilens Inc.
IPC分类号： G02B5/32 , G02F1/1333
CPC分类号： G02F1/13476 , G02B5/32 , G02F2001/13345 , G02F2001/133627 , G02F2201/307
摘要： Disclosed is an optical system (312) and an imaging and display system using the optical system. The optical system has at least first (330) and second (332) optical elements aligned on a common axis (334). In one embodiment, each of the first and second optical elements can operate in an active state or in inactive state and comprise a photopolymer and liquid crystal combination (12). Each of the first and second optical elements is configured to transmit incident light substantially unaltered when each of the first and second optical elements operates in the inactive state. In the active state, however, each of the first and second optical elements does not transmit incident light substantially unaltered. Rather each of the first and second optical elements substantially alters light incident thereon when each of the first and second optical elements operates in the active state.
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公开(公告)号：EP1129382A2
公开(公告)日：2001-09-05
申请号：EP99965791.9
申请日：1999-11-12
申请人： Digilens Inc.
CPC分类号： G02B27/017
摘要： A head mountable apparatus is described for transmitting an image to the user's eye using switchable holographic optical elements. In one embodiment, an optical system is provided that is configured to receive an image provided by an image generator and which forms a light path along which light is transmitted from the image generator to an eye of the user. The optical system includes a first section disposed at an end of the optical system adjacent to a user's eye and a second section configured to transmit light received by the optical system to the first section. The first section of the optical system includes at least one switchable holographic optical element.
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公开(公告)号：EP1105779A1
公开(公告)日：2001-06-13
申请号：EP99933849.4
申请日：1999-07-09
申请人： Digilens Inc.
CPC分类号： H04N5/7441 , G02B5/32
摘要： A projection system (26; 60; 80; 88; 102; 122) and a method of displaying a projected input image on a projection screen (14; 30; 96; 104; 124) of the system utilize one or more reconfigurable holographic optical elements (HOEs) (42, 44, 46, 54, 56 and 58; 64, 66, 68 and 70; 98; 106 and 108; 126 and 128) to optically manipulate propagating light in the system. The reconfigurable HOEs may be configured to perform simple optical functions that are commonly associated with traditional optical devices, such as lenses, prisms and mirrors. However, the reconfigurable HOEs may also be configured to perform sophisticated optical manipulations, such as varying the light intensity toward a specific direction and generating virtual (holographic) images. Each reconfigurable HOE includes a hologram that is sandwiched between two electrode layers. The hologram is a holographic photopolymeric film that has been combined with liquid crystal. The hologram has an optical property that changes in response to an applied electrical field. The reconfigurable HOEs may be included in a color filter (38) of the system to selectively diffract tristimulus color lights to a display panel (40) in order to provide a color display of the input image that is projected onto the projection screen. The reconfigurable HOEs may also be included in a projection optics (34; 62) to magnify the projected image on the projection screen and/or redirect the projected image to form a tiled image on the projection screen. Furthermore, the reconfigurable HOEs may be used in the projection screen to vary the light intensity toward specific viewing positions. In one application, the reconfigurable HOEs in the projection screen allow the system to present the display image in a stereoscopic form.
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公开(公告)号：EP1114340A1
公开(公告)日：2001-07-11
申请号：EP99948203.7
申请日：1999-09-14
申请人： Digilens Inc.
IPC分类号： G02B5/32 , G02F1/1335 , H04N9/31
CPC分类号： G02F1/133621 , G02B5/32 , G02F1/13342 , G02F1/13473 , G02F1/292 , G02F2001/133622 , G02F2001/291 , G02F2201/346 , G03H1/26
摘要： Holographic optical elements (HOEs) can be used in systems and methods for providing illumination and for projecting images. The HOEs may be switchable HOEs, whose diffractive properties can be controlled. Described herein is a method of combining light from two or more illumination sources. In one embodiment, a reflection-type HOE is illuminated by the first illumination source. The HOE diffracts light from the first illumination source into an output direction. Light from the second illumination source is transmitted through the HOE and onto a reflective optical element, which reflects the light back through the HOE and into the same output direction. Also described is a projection system that uses two or more HOEs to combine two or more colors of light for use by a single image display. The system includes one or more light sources, an image display (such as a reflective or transmissive LCD display or a MEMS display, for example), and a first and a second HOE. The HOEs are each mounted between a light source and the image display, and configured to provide one color of light to the image display and from the image display into an output direction. In one embodiment, the HOEs are switchable HOEs and can be used for color-sequential display and/or for color balancing.
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公开(公告)号：EP1084431A1
公开(公告)日：2001-03-21
申请号：EP00925877.3
申请日：2000-03-23
申请人： Digilens Inc.
IPC分类号： G02B5/32
摘要： Disclosed is a device for producing colored light and an image generating apparatus including such a device. The device includes a switchable light-directing apparatus (108) configured to receive light and a first control circuit (118) coupled to the switchable light-directing apparatus. The first control circuit provides control signals to the switchable light-directing apparatus. In response to the switchable light-directing apparatus receiving a control signal, the switchable light-directing apparatus directs a first portion of the received light to a first region of a plane. Additionally, the switchable ligth-directing apparatus directs a second portion of the received light to a second region of the plane, and directs a third portion of the received light to a third region of the plane. The second region is positioned between the first and third regions of the plane.
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