Optical system and image display apparatus
AssigneeCanon Kabushiki Kaisha
InventorRyoji Kondo
Life of this patent
Estimating the term…
Abstract
An optical system configured to guide light from a display element configured to display an image to an observer includes, in order from a side of the display element, a polarizing plate, a first phase plate, a first lens unit, a half-transmissive reflective film, a second phase plate, and a reflective and transmissive polarizing plate. The first lens unit includes a lens made of a resin material. Some conditions are satisfied.
Claims18
An optical system configured to guide light from a display element configured to display an image to an observer, the optical system comprising, in order from a side of the display element, a polarizing plate, a first phase plate, a first lens unit, a half-transmissive reflective film, a second phase plate, and a reflective and transmissive polarizing plate,
- wherein the first lens unit includes a lens made of a resin material, and
- wherein the following conditions are satisfied:
- ΔP1≠λ/4
- 3λ/20≤ΔP1+ΔL1≤7λ/20
- where λ (nm) is a wavelength of the light, ΔP1 is a phase difference given by the first phase plate to the light, and ΔL1 is a phase difference given by the first lens unit to the light.
An optical system configured to guide light from a display element configured to display an image to an observer, the optical system comprising, in order from a side of the display element, a polarizing plate, a first phase plate, a half-transmissive reflective film, a lens unit, a second phase plate, and a reflective and transmissive polarizing plate,
- wherein the lens unit includes a lens made of a resin material, and
- wherein the following conditions are satisfied:
- 3λ/20≤ΔP2+ΔL≤7λ/20
- ΔP2≠λ/4
- where λ (nm) is a wavelength of the light, ΔP2 is a phase difference given by the second phase plate to the light, and ΔL is a phase difference given by the lens unit to the light.
Dependencies are inferred from the claim text.