Illuminator and projector for preventing a shift of an illumination region

摘要

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.

主权项

1. 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.