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Zooming-projection camera lens

A technology of projection lens and projection display, which is applied in the field of zoom projection lens, can solve problems such as design conditions and parameter values ​​without any explanation, and achieve the effect of improving projection quality, good aberration, and aberration correction

Inactive Publication Date: 2008-03-26
ASIA OPTICAL CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent only gives a general introduction to the structure and function of the projection lens, but does not make any explanation on the specific design conditions and parameter values, so further research is needed to solve the aberration problem that still exists

Method used

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  • Zooming-projection camera lens
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  • Zooming-projection camera lens

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Experimental program
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Embodiment Construction

[0038] Please refer to Fig. 1, the zoom projection lens 1 of the present invention can be installed on the DLP projector, and is used for projecting the image on the DMD imager onto the screen. The zoom projection lens 1 includes a first lens group 10 with negative diopter and The second lens group 20 with positive diopter, wherein the first lens group 10 is made up of several lenses, it is installed on the screen side (the left side as shown in Figure 1) and can be in the range of the first variable distance M1 Moving along the optical axis, the so-called screen side refers to a plane on which the image can be projected; the second lens group 20 is made up of several lenses, which are installed on the image plane side (the right side as shown in Figure 1 ) and can move along the optical axis within the range of the second variable distance M2, the so-called image plane side refers to the installation position of the DMD imager (not shown). Another aperture stop 30 is located ...

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PUM

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Abstract

The present invention discloses zooming projection lens capable of installing in projection display device. Zooming projector lens includes first lens assembly having negative dioptre and second lens assembly having positive dioptre, wherein first lens assembly consisting of plurality of lens near by image surface and capable of moving along optical axis, second lens assembly consisting of plurality of lens near by object plane and capable of moving along optical axis, one aperture stop set between two adjacent lens of second lens assembly, said aperture stop capable of moving along with second lens assembly, said zooming projector lens capable of correcting aberration, thereby raising projection quality.

Description

【Technical field】 [0001] The invention relates to a zoom projection lens, in particular to a zoom projection lens applicable to the projection display optical system of a projection device and the image capture optical system of an image capture device. 【Background technique】 [0002] Projectors can be divided into CRT (Cathode Ray Tube) projectors, LCD (Liquid Crystal Display) projectors, DLP (Digital Light Processing) projectors and LCoS (Liquid Crystalon Silicon) projectors, all of which use optical projection , to project the image on a large screen. For example, a DLP projector uses a DMD (Digital Micromirror Device) as a light valve imager. The imaging principle is to control the reflection direction of light by the rotation of the DMD micromirror device (±10°), so that the on-off of the signal at this point can be controlled. , and then project the image on the DMD micromirror device onto the screen through an optical lens. [0003] The quality of the picture projec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B9/10G02B7/02G02B15/14
Inventor 郭仲渊
Owner ASIA OPTICAL CO INC
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