Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/12—Picture reproducers
  • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
  • H04N9/3141—Constructional details thereof
  • H04N9/315—Modulator illumination systems
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
  • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining

Definitions

• the means for combining the encoded beams is preferably the same discriminator employed to separate the uncoded beams in to s- and p- polarized beams, in which case the encoded beams are reflected back into the device in accordance with a scheme that depends on the type of spatial modulators employed. However, this is not necessary and it is equally possible to combine the beams with a second similar polarizing beam discriminator downstream of the first. Instead of reflecting the encoded beams back into the first device, the encoded beams are transmitted to a second device where they are combined into the output beam.
• Fig. 12. shows the calculated reflectance curves for s-polarized light as a function of wavelength ratio for thin film systems having 1 , 20, 40 and 60 periods of a three-layer basic structure as in Fig. 8.
• the angle of incidence ⁇ o is 57.3°.
• Fig. 16 shows the calculated reflectance curves for s-polarized light as a function of wavelength ratio for a thin film system having 40 periods of the basic structure as in Fig. 8.
• the angles of incidences are 50°, 55°, 60°, 65° and 70°;
• Fig. 36 shows a Imaging element 1 that is a monochrome, reflective, twisted nematic LC panel
• Display system 3 is a super high efficiency 2D/3D projection display. It consists of one thin film polarizing device 400, a lighting element 401 that emits white light, six identical reflective imaging elements 440, 441 , 442, 443, 444, and 445 that can be selected from monochrome Imagining elements 1 (TNLC) or 5 (PDLC), two identical "X" shape colour separation cubes or plates 446, 447, a projection lens 405 and an optional screen 406.
• unpolarized light from the lighting element 401 is launched into the end face 407 of the thin film polarizing device 400 and is split into two polarized light beams by the thin film coatin.
• the p-polarized light is reflected from the thin film layers to the end face 408; the s-polarized light is transmitted through the thin film layers and exits the end face 409.
• Display system 4 An alternative embodiment of Display system 4 is Display system 5, shown in Figure 50. In operation, this embodiment is very similar to Display system 1 except that the light incident upon the thin film polarized devices is already separated into colours. It is also similar to Display system 4 except that instead of using six reflective imaging
• the offset is approximately a distance between the eyes of an average person or a distance related thereto and to the nature of the camera lenses employed.
• the scene recorded by the first camera is viewed by only one of the viewer's eyes.
• the scene recorded by the second camera is viewed by the other of the viewer's eyes.
• the configuration shown and described with reference to Fig. 52 lends itself to this 3-D recording and viewing.

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Polarising Elements (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=4158741

Family Applications (1)

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Families Citing this family (2)

• 1996
  • 1996-08-13 CA CA002183188A patent/CA2183188A1/en not_active Abandoned
• 1997
  • 1997-08-13 EP EP97935403A patent/EP0855121A1/de not_active Withdrawn

Non-Patent Citations (1)

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