Illuminator and projector for preventing a shift of an illumination region
AssigneeSeiko Epson Corporation
InventorKoichi Akiyama
Life of this patent
Estimating the term…
Abstract
An illuminator includes a light source section having at least one solid-state light source, a multi-lens array provided in a position downs ream of a diffractive optical member and having a plurality of lenses, and a superimposing system provided in a position downstream of the multi-lens array. The diffractive optical member divides light from the light source section into a plurality of sub-light fluxes corresponding to the plurality of lenses. Each of the plurality of sub-light fluxes is incident on a corresponding lens. The plurality of sub-light fluxes having passed through the multi-lens array are superimposed on one another on an illumination receiving region through the superimposing system.
Claims10
An illuminator comprising:
- a light source section having at least one solid-state light source;
- a diffractive optical member having a plurality of regions;
- a multi-lens array provided in a position downstream of the diffractive optical member and having a plurality of lenses corresponding to the plurality of regions in a one-to-one relationship;
- and
- a superimposing system provided in a position downstream of the multi-lens array,
- wherein the plurality of regions of the diffractive optical member divide a light flux incident from the light source section into a plurality of sub-light fluxes,
- each of the plurality of sub-light fluxes is incident on a corresponding lens of the plurality of lenses,
- a predetermined region of a predetermined plane is illuminated with the plurality of sub-light flaxes having passed through the multi-lens array in such a way that the plurality of sub-light fluxes are superimposed on one another through the superimposing system, and
- each of the plurality of regions is optically conjugate with the predetermined region.
Dependencies are inferred from the claim text.