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Optical device and projector

A technology for optical devices and light modulation devices, applied in laser cooling devices, optics, projection devices, etc., can solve problems such as optical image degradation, and achieve the effects of suppressing degradation, expanding contact area, and high-efficiency cooling

Inactive Publication Date: 2005-10-05
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there will be a problem that the optical image formed in the light modulation element will be degraded due to the light beam passing through the discolored cooling medium.

Method used

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  • Optical device and projector
  • Optical device and projector
  • Optical device and projector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 of the present invention will be described below with reference to the drawings.

[0050] (1) Structure of the projector

[0051] FIG. 1 is a schematic diagram showing a schematic configuration of a projector 1 .

[0052] The projector 1 is a device that modulates a light beam emitted from a light source according to image information to form an optical image, and projects the optical image on a screen in enlarged form. This projector 1 has a casing 2, a cooling unit 3, an optical unit 4, and a projection lens 5 as projection optical means.

[0053] In addition, in FIG. 1 , the illustration is omitted, and in the housing 2 , a power supply circuit block, a lamp driving circuit, and the like are arranged in a space other than the cooling unit 3 , the optical unit 4 , and the projection lens 5 .

[0054] The casing 2 is made of synthetic resin or the like, and has a substantially rectangular parallelepiped shape in which the cooling unit 3, the optical unit...

Embodiment 2

[0143] Next, the optical device of the projector according to Embodiment 2 of the present invention will be described. The optical device of Embodiment 2 has substantially the same configuration as the optical device of Embodiment 1 described above, but differs in the configuration of the optical conversion device of the main body of the optical device. In addition, in the following description, the same code|symbol is attached|subjected to the part which is the same or substantially the same as what has already been demonstrated, but the description is abbreviate|omitted.

[0144] FIG. 9 is a perspective view of an optical device main body 45A according to Embodiment 2. FIG.

Embodiment approach 2

[0145] The optical device main body 45A of the optical device 44 according to the second embodiment differs from the optical device main body 45 shown in the above-mentioned first embodiment in that the optical conversion device 6 is provided in that it has the optical conversion device 7 . Other configurations , which is roughly the same as the optical device main body 45 . That is to say, the optical device main body 45A, as shown in FIG. conversion device 7R, an optical conversion device 7G that converts green light, and an optical conversion device 7B that converts blue light), these optical conversion devices 7 are mounted on the optical conversion devices of each light beam incident surface of the cross dichroic prism 444 to hold Body 452 and prism base 453 carrying cross dichroic prism 444 .

[0146] FIG. 10 is a perspective view showing the optical conversion device 7 . In addition, FIG. 11 is an exploded perspective view of the optical conversion device 7 .

[0147...

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PUM

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Abstract

This invention provides an optical device capable of efficiently cooling an optical modulator and preventing deterioration of an optical image formed by the optical modulator. In the optical device equipped with an optical modulation device having the optical modulator which modulates light fluxes emitted from a light source according to image information and forms the optical image, openings according to an image formation area of the optical modulator and a holding frame which holds the optical modulator, the openings according to the image formation area of the optical modulation device are formed, a container-like cooling medium encapsulation part in which a cooling medium which cools the optical modulator is encapsulated is provided on the light flux incident side and / or the light flux emitting side of the optical modulation device, the cooling medium encapsulation part is provided with a first cooling chamber which performs sealing encapsulation of the cooling medium in a space including the openings and a second cooling chamber which is formed by being demarcated from the first cooling chamber, guides and circulates other cooling medium from the outside of the cooling medium encapsulation part at a position avoiding the openings.

Description

technical field [0001] The present invention relates to a projector having a light modulation element that modulates light beams emitted from a light source in accordance with image information to form an optical image, a cooling device for cooling the light modulation element, and the optical device. Background technique [0002] Conventionally, projectors have been used for presentations at conferences, seminars, exhibitions, and the like, and for viewing movies at home. The composition of this projector includes a light source; a light modulation element that modulates the light beam emitted from the light source corresponding to the image information to form an optical image; and is arranged in the front and rear stages of the light modulation element to perform optical conversion of the incident light beam. An optical device with a plurality of optical components that expands and projects an optical image formed by the optical device. [0003] In recent years, in order...

Claims

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Application Information

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IPC IPC(8): G02F1/13F25B1/00G02F1/01G02F1/133G02F1/1335G03B21/00G03B21/16H01S3/04
CPCG02F1/133385
Inventor 北林雅志
Owner SEIKO EPSON CORP