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Projection system

A projection system and image technology, applied in the field of projection systems, can solve the problems of small field of view, large field of view, inability to guarantee the quality of projection imaging, and achieve the effect of taking into account the quality of projection imaging

Active Publication Date: 2020-01-31
SUN YANG OPTICS DEV CO LTD +1
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  • Claims
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Problems solved by technology

[0003] Secondly, for the purpose of projecting image quality, the longer the focal length of the projection lens is, the smaller the angle of view will be. On the contrary, the shorter the focal length of the projection lens will be, but the larger the angle of view will be. The more intense it is, so the short-focus projector cannot guarantee the projection image quality when the projection distance is shortened.

Method used

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Embodiment Construction

[0083] First, please refer to Figure 1- Figure 10 As shown, a preferred embodiment of a projection system L of the present invention includes: a telephoto lens L capable of independent imaging 2 , its focal length is between 70mm and 300mm. In this embodiment, the telephoto lens L 2 The focal length is 102.03mm, but it is not limited to this.

[0084] A short-focus lens L capable of independent imaging 1 , its focal length is between 3mm ~ 8mm, and with the telephoto lens L 2 An optical axis 0 is provided. In this embodiment, the short-focus lens L 1 The focal length of the camera is 5.38mm, but it is not limited to this.

[0085] At least one reflective element B, which changes the direction of the optical axis 0; thereby, when the telephoto lens L 2 After imaging, the short-focus lens L 1 Then image the image to a predetermined place. In this embodiment, the telephoto lens L 2 Has a telephoto optical axis O 2 , the short focus lens L 1 Has a short focus optical axi...

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Abstract

A projection system comprises the following parts of a telephoto lens capable of independent imaging with a focal length of 70mm to 300mm; a short focus lens capable of independent imaging with a focal length of 3mm to 8mm, wherein the short focus lens is provided with an optical axis with the telephoto lens; and at least one reflective element that changes the direction of the optical axis; thereby, when the telephoto lens forms an image, the short focus lens forms an image to a predetermined position.

Description

technical field [0001] The present invention relates to a projection system, especially a kind of cooperation between a short-focus lens and a long-focus lens, so that the projection system can perform ultra-short-focus projection to a screen. Background technique [0002] Projectors are constantly innovating with the advancement of technology. From general focal length projectors to short focal length projectors, it also shows the value of projectors in the market. Its applications are extensive, including multimedia information presentation systems, projection TVs, and home theaters. However, in recent years, the short-throw projector market has been used in the education market and the promotion of modern small-sized families. [0003] Second, in order to project the imaging quality of the projection lens, the longer the focal length of the projection lens is, the smaller the angle of view will be. On the contrary, the shorter the focal length of the projection lens will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/06G03B21/28
CPCG02B13/00G02B13/18G02B13/06G03B21/28
Inventor 吴昇澈周昱宏黄威豪
Owner SUN YANG OPTICS DEV CO LTD
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