Lens device and projector having diaphragm mechanisms with substantially square apertures
AssigneesChinontec Kabushiki Kaisha, Mitsubishi Denki Kabushiki Kaisha
InventorsHiroki Abe, Tomoo Fujimori, Motoo Takahashi, Kenji Samejima
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Abstract
The invention provides a lens device of a projector for projecting light that has been modulated and emitted by a display device, wherein said lens device has an optical axis and is arranged telecentric to rays of light emitted from said display device, said lens device has a diaphragm mechanism having an aperture at such a position that the lens device causes principal rays emitted from various locations on the display device to intersect with the optical axis, and said aperture is substantially square.
Claims11
A lens device of a projector for projecting light that has been modulated and emitted by a display device, wherein:
- said lens device has an optical axis and is arranged telecentric to rays of light emitted from said display device, and
- said lens device comprises a diaphragm mechanism having a substantially square aperture at such a position that the lens device causes principal rays emitted from various locations on the display device to intersect with the optical axis;
- wherein the aperture comprises projecting portions projecting in four directions which correspond to a portion of the display device that has a relatively low contrast.
A lens device of a projector for projecting light that has been modulated and emitted by a display device, wherein:
- said lens device has an optical axis and is arranged telecentric to rays of light emitted from said display device, and
- said lens device comprises a diaphragm mechanism having a substantially square aperture at such a position that the lens device causes principal rays emitted from various locations on the display device to intersect with the optical axis;
- wherein a size of the aperture of the diaphragm mechanism is adjustable.
A projector comprising:
- a light source;
- a display device to modulate light emitted from the light source;
- and
- a lens device to project light emitted from said light source via said display device, said lens device having an optical axis and being arranged telecentric to rays of light emitted from said display device,
- wherein said lens device comprises a diaphragm mechanism having a substantially square aperture at such a position that the lens device causes principal rays emitted from various locations on the display device to intersect with the optical axis;
- and
- wherein the aperture comprises projecting portions projecting in four directions which correspond to a portion of the display device that has a relatively low contrast.
A projector comprising:
- a light source;
- a display device to modulate light emitted from the light source;
- and
- a lens device to project light emitted from said light source via said display device, said lens device having an optical axis and being arranged telecentric to rays of light emitted from said display device,
- wherein said lens device comprises a diaphragm mechanism having a substantially square aperture at such a position that the lens device causes principal rays emitted from various locations on the display device to intersect with the optical axis;
- and
- wherein a size of the aperture of the diaphragm mechanism is adjustable.
Dependencies are inferred from the claim text.