High-light-transmission and high-illumination projection lens assembly matched with 0.47 DMD

A projection lens and high-illuminance technology, applied in the lens field, can solve the problems of small matching target surface, no temperature drift characteristics, small projection screen, etc., achieve clear and uniform projection screen, improve thermal defocus phenomenon, and strong compatibility The effect of the characteristic

Active Publication Date: 2021-12-24
XIAMEN LEADING OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The projection lens is an important part of the projection equipment, but the existing projection lenses have at least the following deficiencies: usually the matching target surface is not large, the projection screen is small, and the application range is limited; As a result, the brightness uniformity of the projected picture is poor; most of them do not have temperature drift characteristics. In actual use, if the brightness of the optical machine is too high or the working time is too long, there will be thermal out-of-focus phenomenon, which will affect the actual use

Method used

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  • High-light-transmission and high-illumination projection lens assembly matched with 0.47 DMD
  • High-light-transmission and high-illumination projection lens assembly matched with 0.47 DMD
  • High-light-transmission and high-illumination projection lens assembly matched with 0.47 DMD

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] refer to figure 1 As shown, this embodiment discloses a Datong light high-illuminance projection lens with 0.47 DMD, which sequentially includes a first lens 1, a second lens 2, a third lens 3, The fourth lens 4, the fifth lens 5, the diaphragm 11, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9 and the tenth lens 10, the first lens 1 to the tenth lens 10 Each includes an object side facing the object side A1 and allowing the imaging light to pass through, and an image side facing the image side A2 and allowing the imaging light to pass through;

[0105] The first lens 1 has a negative refractive power, the object side of the first lens 1 is convex, and the image side is concave;

[0106] The second lens 2 has a negative refractive power, the object side of the second lens 2 is convex, and the image side is concave;

[0107] The third lens 3 has a positive refractive power, the object side of the third lens 3 is concave, and the image side is...

Embodiment 2

[0125] Cooperate Figure 7 to Figure 12 As shown, the concave-convex surface and refractive power of each lens in this embodiment and the first embodiment are roughly the same, and the optical parameters such as the radius of curvature of the lens surface and the thickness of the lens are different.

[0126] The detailed optical data of this specific embodiment is shown in Table 2.

[0127] The detailed optical data of table 2 embodiment two

[0128] surface Caliber size (diameter) radius of curvature thickness material Refractive index Dispersion coefficient focal length 0 subject surface Infinity 2000 1 first lens 34.59 35.18 5.57 H-ZBAF21 1.723 38.02 -39.8 2 25.01 14.82 4.59 3 second lens 24.80 22.25 3.00 ZEONEX_T62R 1.536 55.98 -44.6 4 22.64 11.01 8.85 5 third lens 22.81 -131.22 12.58 H-ZLAF68N 1.883 39.23 45.6 6 24.00 -32.33 1.93 7 ...

Embodiment 3

[0135] Cooperate Figure 13 to Figure 18 As shown, the concave-convex surface and refractive power of each lens in this embodiment and the first embodiment are roughly the same, and the optical parameters such as the radius of curvature of the lens surface and the thickness of the lens are different.

[0136] The detailed optical data of this specific embodiment is shown in Table 3.

[0137] The detailed optical data of table 3 embodiment three

[0138]

[0139]

[0140] In this specific embodiment, please refer to the following table for detailed data on the parameters of the second lens 2 and the aspheric surface of the tenth lens 10:

[0141] Face number K A4 A6 A8 A10 A12 A14 L2 S1 0.00 2.128E-06 -4.076E-07 2.294E-09 -1.577E-11 6.690E-14 -1.089E-16 L2 S2 -0.35 -3.105E-05 -9.512E-07 4.603E-09 -7.269E-11 5.300E-13 -1.590E-15 L10 S1 3.57 -1.772E-05 -3.581E-08 2.038E-11 -1.319E-12 4.178E-15 -2.424E-17 L10 S2 -0....

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Abstract

The invention discloses a large-light-transmission high-illumination projection lens assembly matched with a 0.47 DMD. The projection lens assembly comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens distributed in sequence from an object side to an image side along an optical axis, wherein each of the first lens to the tenth lens comprises an object side surface and an image side surface; and the first lens has a negative refractive index, the second lens has a negative refractive index, the third lens has a positive refractive index, the fourth lens has a negative refractive index, the fifth lens has a positive refractive index, the sixth lens has a negative refractive index, the seventh lens has a negative refractive index, the eighth lens has a positive refractive index, the ninth lens has a negative refractive index, and the tenth lens has a positive refractive index. The optical imaging lens assembly has only the above ten lenses with refractive indexes. The actual maximum compatible target surface size of the lens assembly of the invention can reach phi 16 mm; the lens assembly has strong compatible use characteristics; and a large-aperture high-illumination design is adopted, so that projected pictures are clear and uniform.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to a Datong light high-illuminance projection lens matched with 0.47DMD Background technique [0002] In projection equipment (such as film projectors, laser projection TVs, etc.), the projection display part is composed of three parts: laser light source, light processing component (ie, optical machine part), and lens. The laser light source is used to form three primary colors or four primary colors. Provide lighting for the optical-mechanical part, the three primary colors or four primary colors enter the optical-mechanical part in turn, are modulated by the DMD (Digital Micro-mirror Device, digital micromirror device) chip, and output to the laser projection lens part, and then projected to the laser projection lens optical system The image is displayed on the projection screen. [0003] The projection lens is an important part of the projection equipment, but the existing projec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G03B21/14
CPCG02B13/18G03B21/14
Inventor 黄波黄翔邦池鸿洲潘锐乔
Owner XIAMEN LEADING OPTICS
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