Polarization beam splitting apparatus, light source apparatus, display apparatus, and illumination apparatus
AssigneeCanon Kabushiki Kaisha
InventorYuuki MAEDA
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Abstract
A polarization beam splitting apparatus may be configured to split light from a light source and emit a plurality of polarized lights and may include a plurality of optical surfaces including a first optical surface, a second optical surface, and a third optical surface. The first optical surface is disposed closer to an incident portion of the light on the polarization beam splitting apparatus than the second optical surface. The second optical surface is disposed closer to the incident portion than the third optical surface. Predetermined inequalities are satisfied.
Claims27
A polarization beam splitting apparatus configured to split light from a light source and emit a plurality of polarized lights, the polarization beam splitting apparatus comprising:
- a plurality of optical surfaces including a first optical surface, a second optical surface, and a third optical surface,
- wherein the first optical surface is disposed closer to an incident portion of the light on the polarization beam splitting apparatus than the second optical surface,
- wherein the second optical surface is disposed closer to the incident portion than the third optical surface, and
- wherein the following inequalities are satisfied:
- 5
- ≤
- TP
-
- 1
- ≤
- 7
-
- 5
- RS
-
- 1
- ≥
- 7
-
- 5
- where TP1 is a transmittance (%) of a dominant wavelength of polarized light polarized in a first direction on the first optical surface, and RS1 is a reflectance (%) of the dominant wavelength of polarized light polarized in a second direction on the first optical surface.
Dependencies are inferred from the claim text.