Patent ID: 7689111

Claim:
An optical apparatus comprising: a light deflection unit including a deflection optical member which deflects at least one of a first luminous flux and a second luminous flux relative to the other, the first and second luminous fluxes passing through a first area and a second area in the exit pupil of an optical system, respectively, and forming images on a photoelectrical conversion element, wherein the light deflection unit comprises a light-limiting member which limits an image-forming area where at least one of the first and second luminous fluxes emerging from the light deflection unit forms the image on the photoelectrical conversion element, wherein the light-limiting member is formed of an entrance-side member placed on the side of an entrance surface of the deflection optical member and an emergence-side member placed on the side of an emergence surface of the deflection optical member, and wherein each of the entrance-side member and the emergence-side member has alternate areas for transmitting a luminous flux and areas for blocking the luminous flux, and the areas of the entrance-side member have a different phase from that of the areas of the emergence-side member.