Image projection apparatus
First Claim
1. An image projection apparatus comprising:
- a light source;
an image generating unit that generates an image by using the light source; and
a projection optical unit that projects the image generated by the image generating unit, whereinthe image generating unit and the projection optical unit are arranged in a vertical direction,the light source is arranged beside the image generating unit, andthe projection optical unit projects the image on a plane positioned in a direction orthogonal to the vertical direction, and the projection optical unit includesa first optical system having a plurality of lenses, anda second optical system having a first mirror, a second mirror, a mirror holder, and a transmitting glass,the first mirror is positioned on an optical path of light output from the first optical system,the second mirror is a concave mirror and is positioned on an optical path of light reflected from the first mirror so as to directly project the image to the plane positioned in the direction orthogonal to the vertical direction,at least the first mirror is fixed to the mirror holder through the interposition of a first bracket, andthe transmitting glass allows the light reflected from the second mirror to be transmitted, and the transmitting glass is fixed to the first bracket that fixes the first mirror to the mirror holder.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is an image projection apparatus, such as a projector, including a light source; an image generating element such as a DMD that receives light from the light source and forms an image; an image generating unit that irradiates the image generating element with the light from the light source; a first optical system including multiple transmission refractive optical elements; a second optical system arranged on an optical path of outgoing light of the first optical system and including a reflection optical element; and a projection optical system that enlarges and projects an image conjugate to the image generated by the image generating element as a projected image. The light source, the image generating unit, and the first optical system are arranged side by side in series in a direction parallel with the projected image plane.
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Citations
6 Claims
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1. An image projection apparatus comprising:
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a light source; an image generating unit that generates an image by using the light source; and a projection optical unit that projects the image generated by the image generating unit, wherein the image generating unit and the projection optical unit are arranged in a vertical direction, the light source is arranged beside the image generating unit, and the projection optical unit projects the image on a plane positioned in a direction orthogonal to the vertical direction, and the projection optical unit includes a first optical system having a plurality of lenses, and a second optical system having a first mirror, a second mirror, a mirror holder, and a transmitting glass, the first mirror is positioned on an optical path of light output from the first optical system, the second mirror is a concave mirror and is positioned on an optical path of light reflected from the first mirror so as to directly project the image to the plane positioned in the direction orthogonal to the vertical direction, at least the first mirror is fixed to the mirror holder through the interposition of a first bracket, and the transmitting glass allows the light reflected from the second mirror to be transmitted, and the transmitting glass is fixed to the first bracket that fixes the first mirror to the mirror holder. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification