Projection optics and projectors

Abstract

To provide a projection optical device and projector that can suppress a shift of pixels of a projected image caused by heat.SOLUTION: A projection optical device comprises an optical system that image light enters; a reflector element that reflects the image light emitted from the optical system, and a housing that houses the optical system and at least part of the reflector element. The reflector element includes a base material having a first surface on which the image light is incident and a second surface opposite from the first surface, a reflection layer provided at the first surface of the base material, and a heat dissipation member provided at the second surface of the base material and including a protrusion protruding from the second surface.SELECTED DRAWING: Figure 2

Claims

1. The optical system into which the image light is incident, A reflective element that reflects the image light emitted from the optical system, The optical system and a housing that accommodates at least a portion of the reflective element are provided. The aforementioned reflecting element is A substrate having a first surface to which the image light is incident and a second surface opposite to the first surface, A reflective layer provided on the first surface of the substrate, The substrate has a heat pipe provided on the second surface and protruding from the second surface, The heat pipe has heat dissipation fins exposed to the outside of the housing and extends between the second surface and the housing. A projection optical device characterized by the following features.

2. The illuminance distribution formed on the reflective layer by the image light includes a first region where the illuminance is higher than a predetermined value. The heat pipe is provided in at least the second region of the second surface that corresponds to the first region. The projection optical device according to feature 1.

3. The housing has a sealed structure that seals the housing space containing the optical system and the reflective element. The projection optical device according to claim 1 or 2.

4. The aforementioned substrate is made of plastic material. The projection optical device according to claim 1 or 2.

5. The reflective layer has a concave shape. The projection optical device according to claim 1 or 2.

6. The image light emitted from the reduced conjugate plane is incident on the optical system. The reflective element projects the reflected image light onto the magnified conjugate surface. The projection optical device according to claim 1 or 2.

7. A light source device that emits light, A light modulator that modulates the light from the aforementioned light source device, The projection optical device comprises the projection optical device according to claim 1 or claim 2, which projects image light modulated by the optical modulation device, A projector characterized by the following features.

Images