Unlock instant, AI-driven research and patent intelligence for your innovation.

High-resolution large-fov (field of view) zoom projection lens

A high-resolution, projection lens technology, applied in the field of zoom projection lenses with a large field of view, can solve the problems of high price of system materials, difficult design of projection lenses, poor image quality, etc., to improve the transfer function, facilitate material supply and The effect of organizing mass production and good imaging quality

Active Publication Date: 2013-12-25
HUBEI JIUZHIYANG INFRARED SYST CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, in the existing disclosed projection lens technology, it is difficult to have a high image quality at 72lp / mm, and it cannot be better applied to the digital movie projection system based on the 4k DMD chip; spherical, but the image quality is still not good enough to guarantee a good projection effect in the digital cinema projection system based on 4k DMD chips; The shortcomings of the system materials are limited by the supply and demand of materials and the price of materials are high
High-resolution projection lenses require high image quality, uniform illumination, a certain zoom ratio, and long rear working distances, which bring difficulties to the design of projection lenses.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-resolution large-fov (field of view) zoom projection lens
  • High-resolution large-fov (field of view) zoom projection lens
  • High-resolution large-fov (field of view) zoom projection lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: As shown in the figure, it is a basic embodiment of a high-resolution and large-field-of-view zoom projection lens of the present invention. The high-resolution large field of view has a resolution of 2k-4k, which is especially suitable for 4k and can also be used in 2k. The field of view ranges from 65.5° to 54.4°. The high-resolution large field of view zoom projection lens includes an optical system lens group, which includes a front compensation lens group L1, a variable magnification lens group arranged in sequence from the front screen to the rear image plane DMD chip along the optical axis Lens group L2, rear compensation lens group L3 and rear fixed lens group L4; the variable power lens group L2 is a positive focal length component for realizing variable power; both the front compensation lens group L1 and the rear compensation lens group L3 are negative focal lengths The component is used to move the image quality compensation after zooming and k...

Embodiment 2

[0063] Embodiment 2: Different from the above embodiment 1, the focal length f of the system is 30-35 mm, and the lens projection ratio TR is 1-1.17:1.

Embodiment 3

[0064] Embodiment 3: On the basis of the above embodiment 1, the focal length f of the selected system is 28 mm, and the lens projection ratio TR is 1:1. According to the formula calculation, the target surface width c of the DMD is 28 mm, which is suitable for 2k The zoom projection lens used on the DLP projector with a high-resolution DMD chip, according to the formula, it can be known that the projection distance of this embodiment is PD: 25 meters, and the screen width SW: 25 meters.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a high-resolution large-fov (field of view) zoom projection lens. An optical system lens group comprises a front compensation lens group, a variable-magnification lens group, a rear compensation lens group and a rear fixed lens group which are arrayed in sequence along the optical axis from a screen to an image plane DMD (digital micro-mirror device) chip; the variable-magnification lens group is the positive focal-length group component; the front compensation lens group and the rear compensation lens group are the negative focal-length group components; the rear fixed lens group is the positive focal-length group component; the front compensation lens group comprises three lenses; the variable-magnification lens group comprises two lenses; the rear compensation lens group comprises two lenses; the rear fixed lens group comprises six lenses; and the rear fixed lens group is provided with a diaphragm. The focal power of each lens group is distributed reasonably, and the high-resolution large-fov zoom projection lens has a compact structure, a large fov, a high resolution and a good image forming effect, can achieve a significant effect when being used for projecting images on a 2-4k DMD chip based large screen, adopts the materials being easy to process and is suitable for bath production.

Description

technical field [0001] The invention relates to a high-resolution large-field-of-view zoom projection lens, which is a large-field-of-view zoom projection lens suitable for use on a DLP projector with a high-resolution DMD chip, and is particularly suitable for use on a 4K high-resolution DMD chip. Large field of view zoom projection lens used on DLP projectors. Background technique [0002] In recent years, digital film is a technological revolution in the field of film technology. It is a brand-new model different from film films, and it presents the highest-quality images to the audience. With its strong advantages in production, distribution, and projection, it has developed rapidly in the industry. Therefore, there is a strong demand in the market for digital cinema projector systems and their supporting projection lenses. [0003] The digital cinema projector of prior art has mainly adopted two kinds of technical approaches: DLP ((Digital Light Processing, digital li...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/177G02B15/20G02B7/00G02B1/00G02B3/02
Inventor 李升辉邹勇华耿安兵杨长城黄则兵
Owner HUBEI JIUZHIYANG INFRARED SYST CO LTD