Short-focus projection lens structure with transmittance of 0.52

A short-focus projection and transmittance technology, which is applied in optics, instruments, projection devices, etc., can solve difficult problems such as projection ratio, and achieve the effect of small brightness loss and light energy loss

Inactive Publication Date: 2013-02-27
WUXI E SPHERE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in short-focus projection lenses, it is difficult to achieve a throw ratio below 0.50 and a transmittance of more than 95%.

Method used

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  • Short-focus projection lens structure with transmittance of 0.52

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing:

[0015] Such as figure 1 As shown, the present invention has 12 lens compositions. Its design structure is lenses 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 arranged in sequence. Among them, lens 1 is a negative meniscus aspherical lens, and lens 2 is also a negative Meniscus spherical lens, lens 3 is a double-concave spherical lens, lens 4 is a single convex spherical lens, lens 5 is a negative meniscus spherical lens, lens 6 is a double-convex lens, lenses 7 and 8 are cemented lens groups, and lens 7 It is a biconvex lens, eyeglass 8 is a biconvex lens, eyeglasses 9 and 10 are a cemented lens group, wherein eyeglass 9 is a biconvex lens, eyeglass 10 is a biconcave lens, eyeglass 11 is a biconvex lens, and eyeglass 12 is a biconvex lens.

[0016] In the present invention, according to the characteristics of the application, the field angle of the short-focus projection lens is...

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Abstract

The invention discloses a short-focus projection lens structure with transmittance of 0.52. The short-focus projection lens structure is characterized by comprising twelve lenses which are sequentially arranged, namely, a front-group first piece is negative meniscus aspherical lens, a front-group second piece is negative meniscus aspherical lens, a front-group third piece is biconcave spherical lens, a front-group fourth piece is single-convex spherical lens, a rear-group first piece is negative meniscus spherical lens, a rear-group second piece is biconvex lens, a rear-group third piece is balsaming lens of a biconcave lens and a biconvex, a rear-group fourth piece is balsaming lens of a biconvex lens and a biconcave lens, a rear-group fifth piece is biconvex lens and a rear-group sixth piece is biconvex lens. The short-focus projection lens structure is ultra-short in distance and low in brightness loss, can be matched with multiple rear projection machines to manufacture an ultra-thin large-screen rear projector and can be matched with various digital projectors, and is suitable for various occasions required to project large pictures in an ultra-short distance.

Description

technical field [0001] The invention relates to a short-focus projection lens structure, in particular to a short-focus projection lens structure applied to large-screen rear projection, large-screen or large-scale spherical screen splicing projection. Background technique [0002] Generally, the focal length of the lens used in rear projection products is relatively long, so when realizing large-screen rear projection, the thickness of 100-inch rear projection is often more than 1 meter, and the same problem of large distance also exists in large-screen splicing. Fisheye lenses are basically used in spherical screen projection, but the brightness and image quality of fisheye lenses are far inferior to those of short-focus lenses in terms of splicing and fusion in large-scale spherical screens. [0003] Digital projectors are mainly based on three core technologies, namely DLP (Digital Light Prosesing, with DMD as the target surface, reflective lighting), LCD (Liquid Crystal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/00G02B13/06G03B21/14
Inventor 陈龙
Owner WUXI E SPHERE TECH
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