Zoom projection lens

A projection lens and projector technology, applied in the field of projection lenses, can solve problems such as increase and deterioration of projection performance, and achieve the effects of low sensitivity, high mass production, and improved imaging quality.

Inactive Publication Date: 2013-12-18
SUZHOU CHINONTEC IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, digital micromirror unit processing projector (Digital Light Processing, DLP) has gradually become one of the mainstream projectors, and the demand for projection lenses for DLP is also increasing. The temperature change and per

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see figure 1 , as shown in the legend therein, a zoom projection lens for DLP projectors, including a first lens group on the object side and a second lens group on the image side, the first lens group includes A first lens G1, a second lens G2, and a third lens G3; the second lens group includes a fourth lens G4, a fifth lens G5, a sixth lens G6, a seventh lens G7, a The eighth lens G8, a ninth lens G9, and a tenth lens G10; the first lens G1, the second lens G2, the third lens G3, the fourth lens G4, the fifth lens G5, the sixth lens G6, the The seventh lens G7 , the eighth lens G8 , the ninth lens G9 , and the tenth lens G10 are arranged in order from the object side to the image side and are all spherical lenses made of glass.

[0028] The first lens G1 and the seventh lens G7 are meniscus lenses, the second lens G2 is a biconcave lens; the third lens G3, the fourth lens G4 and the tenth lens G10 are biconvex lenses; The fifth lens G5 and the sixth lens G6 a...

Embodiment 2

[0043] The rest is the same as the first embodiment, except that the first lens G1 has a refractive index n1 of 1.755, and the dispersion v1 is 51; the second lens G2 has a refractive index n2 of 1.795, and the dispersion v2 is 47.5; The refractive index n3 of the third lens G3 is 1.795, and the dispersion v3 is 29.5; the refractive index n4 of the fourth lens G4 is 1.605, and the dispersion v4 is 60.5; the refractive index n5 of the fifth lens G5 is 1.53, and the dispersion v5 is 65.0; The refractive index n6 of the sixth lens G6 is 1.795, and the dispersion v6 is 25.5; the refractive index n7 of the seventh lens G7 is 1.795, and the dispersion v7 is 47.5; the refractive index n8 of the eighth lens G8 is 1.665, and the dispersion v8 is 32.0; The ninth lens G9 has a refractive index n9 of 1.77 and a dispersion v9 of 25.0; the tenth lens G10 has a refractive index n10 of 1.795 and a dispersion v10 of 47.0.

Embodiment 3

[0045] The rest is the same as that of Embodiment 1, except that the refractive index n1 of the first lens G1 is 1.765, and the dispersion v1 is 52; the refractive index n2 of the second lens G2 is 1.805, and the dispersion v2 is 48.5; The refractive index n3 of the third lens G3 is 1.805, and the dispersion v3 is 30.5; the refractive index n4 of the fourth lens G4 is 1.615, and the dispersion v4 is 61.5; the refractive index n5 of the fifth lens G5 is 1.54, and the dispersion v5 is 66.0; The refractive index n6 of the sixth lens G6 is 1.805, and the dispersion v6 is 26.5; the refractive index n7 of the seventh lens G7 is 1.805, and the dispersion v7 is 48.5; the refractive index n8 of the eighth lens G8 is 1.675, and the dispersion v8 is 33.0; The ninth lens G9 has a refractive index n9 of 1.78 and a dispersion v9 of 26.0; the tenth lens G10 has a refractive index n10 of 1.805 and a dispersion v10 of 48.0.

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Abstract

The invention discloses a zoom projection lens which is used for a digital light processing (DLP) projector. The zoom projection lens comprises a first lens group arranged on the object side and a second lens group arranged on the image side. The first lens group comprises a first lens, a second lens and a third lens. The second lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens. The ten lenses are sequentially arranged from the object side to the image side and are all spherical lenses made of glass materials. The zoom projection lens is high in imaging quality, low in cost, small in size, small in performance change along with temperature, simple in structure, low in sensitivity and high in mass production.

Description

technical field [0001] The invention relates to a projection lens, in particular to a zoom projection lens. Background technique [0002] With the development of science and technology, projection display technology is constantly improving, and projectors are widely used in various fields such as business, education, and home theater. Among them, digital micromirror unit processing projector (Digital Light Processing, DLP) has gradually become one of the mainstream projectors, and the demand for projection lenses for DLP is also increasing. The temperature change and performance change requirements of the lens are also getting higher and higher. In the current technology, the temperature of many lenses increases with the increase of the internal temperature of the projector, and the projection performance deteriorates seriously. Contents of the invention [0003] In order to solve the above problems, the present invention provides a high-performance, miniaturized zoom...

Claims

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Application Information

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IPC IPC(8): G02B15/177G02B1/00G02B3/00
Inventor 王海亮石小杰
Owner SUZHOU CHINONTEC IND INC
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