Image display apparatus and optical component

摘要

This image display apparatus includes laser beam source portions, a synthesized beam generation portion, a control portion, a branching unit, and a detection portion, while the branching unit has a reflectance or transmittance with increase/decrease characteristics opposite to increase/decrease characteristics of the outputs of laser beams in increasing or decreasing the outputs of the laser beams of color components according to changes of the wavelengths of the laser beams of the color components in order to maintain the prescribed color state of a synthesized beam.

主权项

1. An image display apparatus comprising:
laser beam source portions outputting laser beams of a plurality of color components different from each other, respectively; a synthesized beam generation portion synthesizing the laser beams of the plurality of color components to generate a synthesized beam; a control portion controlling outputs of the laser beam source portions; a branching unit branching the laser beams of the color components; and a detection portion detecting light quantities of the laser beams of the color components branched by the branching unit, wherein the branching unit has a reflectance or transmittance with increase/decrease characteristics opposite to increase/decrease characteristics of outputs of the laser beams in increasing or decreasing the outputs of the laser beams of the color components according to changes of wavelengths of the laser beams of the color components, and the control portion is configured to control the outputs of the laser beam source portions according to light quantities of branched laser beams of the color components detected by the detection portion.