JP2010145451A5 - - Google Patents

Description

Note that FIG. 1 illustrates the image projection apparatus 100 in a vertically installed state (second installation state) in which the longitudinal direction extends vertically (the second mirror 3 is disposed on the upper side and the light source lamp 1 is disposed on the lower side ) . It shows how it is used. In this case, although not shown, it is preferable to use an installation table such as a rack for smoothly exhausting the exhaust from the exhaust fan 6 or to provide a duct for guiding the exhaust from the exhaust fan 6 to the side.

FIG. 4 shows a state in which the image projection apparatus 100 shown in FIG. 1 is used in a horizontal state (first installation state) in which the longitudinal direction extends left and right.

Claims (7)

A plurality of light modulation elements for image-modulating incident light;
The light from the light source lamp into a plurality of light beams, an illumination optical system for superimposing said plurality of light beams on said each light modulator element,
Color combining synthesizing the light from the illumination optical system is decomposed into a plurality of color light guiding said plurality of color lights to the plurality of light modulator elements, said plurality of color light modulated by the plurality of light modulator elements Optical system,
A projection lens for projecting the light synthesized by the color separating and synthesizing optical system onto a projection surface,
A first reflecting member that reflects light from the light source lamp toward the illumination optical system;
A second reflecting member that reflects light from the projection lens toward the projection surface;
An incident optical axis from the illumination optical system to the color separation / synthesis optical system and an extension line of an emission optical axis from the color separation / synthesis optical system to the projection lens extend in parallel with each other at positions spaced apart from each other,
At least a part of the light source lamp is disposed on an extension line of the emission optical axis,
An image projection optical system, wherein an incident direction of light from the light source lamp to the first reflecting member and an emitting direction of light from the second reflecting member to the projection surface are parallel to each other. .   The image projection optical system according to claim 1, wherein an emission direction of light from the light source lamp is a direction orthogonal to the incident optical axis. 3. The image projection device according to claim 2, wherein the fan for cooling the light source lamp is disposed so that a rotation axis of the fan is parallel to the incident optical axis and the emission optical axis. Optical system. An optical system for image projection according to any one of claims 1 to 3,
An image projecting apparatus comprising: a housing for housing the image projecting optical system. Wherein between the light source lamp inside the housing second reflecting member, in parallel power supply unit with respect to the emission optical axis and the incident optical axis, and the color separating and synthesizing optical system and the housing The image projection device according to claim 4, wherein the image projection device is disposed along at least one of the projection lenses.   The image projection apparatus according to claim 4, wherein the casing has a quadrangular prism shape whose longitudinal direction is the direction of the incident optical axis and the outgoing optical axis. Image projection is possible in the first installation state in which the incident optical axis and the emission optical axis extend in the horizontal direction and in the second installation state in which the incident optical axis and the emission optical axis extend in the gravity direction. The image projection apparatus according to claim 4, wherein the image projection apparatus is characterized in that