Structure for tightly closing light exit end of rod integrator and rod integrator holder
AssigneeFuji Photo Optical Co., Ltd.
InventorsHitoshi Shimizu, Tadashi Iwasawa
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Abstract
A rod integrator holder comprises a wall constituting at least a part of an intermediate portion interposed between a rod integrator in an illumination optical system or a holding member for the rod integrator, and an optical member disposed downstream the rod integrator or a holding member for the optical member. The intermediate portion tightly closes a space between a light entrance end of the optical member and a light exit end of the rod integrator against surroundings thereof.
Claims12
A structure for tightly closing a light exit end of a rod integrator;
- said structure comprising an intermediate portion interposed between a rod integrator disposed so as to homogenize a luminous flux density in an illumination optical system or a holding member for said rod integrator, and an optical member disposed downstream said rod integrator or a holding member for said optical member;
- said intermediate portion tightly closing a space between a light entrance end of said optical member and a light exit end of said rod integrator against surroundings thereof.
A rod integrator holder for holding a rod integrator disposed so as to homogenize a luminous flux density in an illumination optical system;
- said rod integrator holder comprising a wall constituting at least a part of an intermediate portion interposed between said rod integrator or a holding member for said rod integrator, and an optical member disposed downstream said rod integrator or a holding member for said optical member;
- said intermediate portion tightly closing a space between a light entrance end of said optical member and a light exit end of said rod integrator against surroundings thereof.
Dependencies are inferred from the claim text.