Projection display apparatus
AssigneeNikon Corporation
InventorsMasaaki Kusano, Yuji Manabe, Atsushi Sekine
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Abstract
A projection display apparatus comprises a modulator, an analyzer, and projecting optical system. The modulator includes two-dimensionally arrayed pixel units and it modulates an incident light and emits the modulated light. The analyzer analyzes the emitted light from the modulator. The projection optical system projects the analyzed light from the analyzer. The analyzer includes a polarized beam splitter having a pair of prisms and an adhesive layer held between the pair of prisms. The difference in thickness between thin and thick portions of the adhesive layer is set equal to a predetermined value or less, based on a pixel pitch of the modulator.
Claims14
An optical device for a projection display apparatus, comprising:
- an analyzer section to analyze modulated light into predetermined polarized light, said modulated light emitted from a modulator section including two-dimensionally arrayed pixel units for modulating an incident light;
- wherein said analyzer section includes a polarized beam splitter having a pair of prisms and an adhesive layer held between said pair of prisms, and
- a difference in thickness between thinnest and thickest portions of said adhesive layer is greater than zero and does not exceed a predetermined value determined based on a pixel pitch of said modulator section.
A method for constructing an optical device for a projection display apparatus, said method comprising:
- providing an analyzer section to analyze modulated light into predetermined polarized light, said modulated light emitted from a modulator section including two-dimensionally arrayed pixel units for modulating an incident light;
- wherein said analyzer section includes a polarized beam splitter having a pair of prisms and an adhesive layer held between said pair of prisms, and
- a difference in thickness between thinnest and thickest portions of said adhesive layer is greater than zero and does not exceed a predetermined value determined based on a pixel pitch of said modulator section.
Dependencies are inferred from the claim text.