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Low-F number L-type short focus all high definition projection lens

A projection lens, L-shaped technology, used in optics, instruments, projection devices, etc., can solve the problems of reducing the F number of the projection lens, reducing the clarity of the picture, etc., to reduce the occupied space, reduce the projection distance, and reduce all the The effect of taking up space

Active Publication Date: 2017-12-01
安徽仁和光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005](1) While reducing the F number of the projection lens, it also reduces the definition of the picture

Method used

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  • Low-F number L-type short focus all high definition projection lens
  • Low-F number L-type short focus all high definition projection lens
  • Low-F number L-type short focus all high definition projection lens

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Embodiment Construction

[0023] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

[0024] like figure 1 As shown, the utility model provides a low F-number L-type short-focus full HD projection lens, which includes a lens assembly arranged between the projection surface and the DMD chip 14, and the lens assembly includes the first negative meniscus lens 1, Second negative meniscus lens 2 , double concave lens 3 , reflector 4 , first convex lens 5 , doublet lens 6 , second convex lens 7 , triplet lens 9 , third convex lens 10 and fourth convex lens 11 . Wherein reflective mirror 4, the first convex lens 5, doublet lens 6, the second convex lens 7, triplet lens 9, the 3rd convex lens 10 and the 4th convex lens 11 are arranged successi...

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Abstract

The invention discloses a low-F number L-type short focus all high definition projection lens comprising a lens assembly arranged between a projection surface and a DMD chip; the lens assembly comprises a reflector, a first convex lens, a dual-bonding lens, a second convex lens, a triple-bonding lens, a third convex lens and a fourth convex lens connected in order from left to right; the lens assembly also comprises a first negative meniscus lens, a second negative meniscus lens and a dual-concave lens arranged in order from top to bottom; the first negative meniscus lens, the second negative meniscus lens and the dual-concave lens are respectively coaxially arranged along the reflected light of the pilot light on the reflector; the projection pilot light passes the fourth convex lens, the third convex lens, the triple-bonding lens, the second convex lens, the dual-bonding lens, the first convex lens, the reflector, the dual-concave lens, the second negative meniscus lens and the first negative meniscus lens, and forms an image on the projection screen; the low-F number L-type short focus all high definition projection lens can reduce the space between the image and the lens, and can simultaneously satisfy fine definition and TV distortion requirements of an aspheric projection lens.

Description

technical field [0001] The invention relates to an optical lens technology, in particular to an L-shaped short-focus full high-definition projection lens with a low F number. Background technique [0002] At present, projectors with higher pixels generally use aspherical projection lenses, and the requirements for definition and TV distortion are relatively easy to meet. However, if plastic lenses are used, it is difficult to satisfy both the definition and TV distortion. [0003] Generally, the F number of the projection lens is between 2-2.5. The low F-number projection lens less than 1.8 has a higher light utilization rate in use, and cooperates with the light source module to greatly improve the brightness of the projected picture of the projection lens. [0004] However, the existing projection lens has the following defects: [0005] (1) When the F number of the projection lens is reduced, the definition of the picture is also reduced. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G03B21/14
CPCG02B13/0045G02B13/006G02B13/0065G02B13/06G03B21/14
Inventor 周伟统
Owner 安徽仁和光电科技有限公司
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