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Projection optical apparatus and projector

A technology for projection optics and light source devices, which is applied in the directions of optics, projection devices, instruments, etc., can solve the problems of easy deterioration of image display quality, deterioration of display quality, and decreased position accuracy of optical components.

Active Publication Date: 2021-10-22
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the temperature of the components holding the optical components rises to cause thermal expansion, and the positional accuracy of the optical components may decrease.
When the position accuracy drops, the display quality of the projected image etc. tends to deteriorate
In particular, in a curved projection optical system, the optical axis deviates at an angle twice the incident angle according to Snell's law, so the deterioration of display quality may become noticeable.

Method used

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  • Projection optical apparatus and projector
  • Projection optical apparatus and projector
  • Projection optical apparatus and projector

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no. 2 Embodiment approach

[0090] In this embodiment, similarly to the first embodiment, a projection optical device that is a curved projection lens applicable to the projector 1 is exemplified. In addition, the projection optical device of this embodiment differs in the configuration of the frame from the projection optical device 60 of the first embodiment.

[0091] Like the projection optical device 60 of the first embodiment, the projection optical device of this embodiment has: the lens barrel 61 as the first housing; the frame 930 as the second housing, which is accommodated in the lens barrel 61; The system 600 is housed in the frame 930 . The projection optical system 600 has a first reflective element 611 that bends an optical path. The lens barrel 61 is provided with first openings 661 a , 661 b , 661 c , and 661 d that communicate the inside and outside of the lens barrel 61 .

[0092] Below, refer to Figure 9 , the structure of the frame 930 will be described. Such as Figure 9 As sho...

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Abstract

The invention provides a projection optical apparatus and a projector for improving cooling performance. The projection optical apparatus includes a first housing, a second housing accommodated in the first housing, and a projection system accommodated in the second housing. The projection system includes a first reflector deflecting the optical path of the projection system. The first housing has a plurality of first openings that cause the interior of the first housing to communicate with the exterior of the first housing. The second housing has a plurality of second openings that cause the interior of the second housing to communicate with the exterior of the second housing.

Description

technical field [0001] The invention relates to projection optics and projectors. Background technique [0002] Conventionally, a curved projection optical device applied to a projection display device such as a projector is known. Such a projection optical device is provided with optical components such as a projection lens and a mirror for changing the projection direction of a display image to be projected. For example, Patent Document 1 discloses a projection optical system including a lens group as an optical component and two mirrors as optical path bending means. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2016-156986 [0004] However, in the projection optical system of Patent Document 1, there is a problem that the inside of the system becomes high temperature. Specifically, when high-beam image light and the like are projected using the projection optical system, the optical components and the atmosphere tend to become high in temperature. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14G03B21/28G03B21/16
CPCG03B21/145G03B21/28G03B21/16G03B21/30
Inventor 泷泽孝浩
Owner SEIKO EPSON CORP
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