| 摘要 |
An optical modulator and an image projection display apparatus using it can reduce a size of a system and improve efficiency, by attaching a reflection plane on a nonlinear matter. The optical modulator in accordance with the present invention includes a nonlinear matter which is divided into predetermined regions having a direction of a polarization which is periodically reversed, an electrode which is joined with the upper and lower sides of the nonlinear matter, for applying an electric field to the polarization region at the lower portion of the nonlinear matter and a reflection plane which is joined to the rear surface of the nonlinear matter, for reflect an incident light to an incident region again. The image projection display apparatus using a reflective optical modulator in accordance with the present invention includes a light source for irradiating a light, a breaker plane which is positioned in the upper portion of the light source, for reflecting the light of the light source to an one-dimensional optical modulator and intercepting the light which is not diffracted in the one-dimensional optical modulator, a collimating lens for focusing the light which is diffracted in the one-dimensional optical modulator, a focusing lens for focusing the light of the collimating lens and a Galvano meter for irradiating an image plane by reflecting the light which is irradiated through the focusing lens.
|
