Ultrahigh-resolution miniature projection lens

A super-high-resolution, micro-projection technology, applied in optics, instruments, projection devices, etc., can solve the problem that the micro-projection lens cannot reach high resolution, and achieve the effect of good imaging quality, small total length, and uniform illumination

Active Publication Date: 2021-03-02
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides an ultra-high resolution miniature projection lens to solve the pro...

Method used

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  • Ultrahigh-resolution miniature projection lens
  • Ultrahigh-resolution miniature projection lens
  • Ultrahigh-resolution miniature projection lens

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0040] see figure 1 , figure 1 The optical structure diagram of the miniature projection lens provided by the application example of the present invention; the present invention provides a kind of ultra-high resolution miniature projection lens, which comprises: the first lens group with positive focal length, aperture 6, The second lens group with positive focal length, vibrating mirror 12, prism 13, window plate 14 and DMD; Wherein the first lens group comprises, the first lens 1 is a glass spherical lens, the second lens 2 is a plastic aspheric lens, the third Lens 3 is a glass spherical lens, the fourth lens 4 is a glass spherical lens, and the fifth lens 5 is a glass spherical lens; wherein the second lens group includes, the sixth lens 7 is a glass spherical lens, the seventh lens 8 is a glass spherical lens, The eighth lens 9 is a glass spherical lens, the ninth lens 10 is a glass spherical lens, and the tenth lens 11 is a glass aspherical lens.

[0041] Wherein the f...

Embodiment 2

[0057] see Figure 7 , Figure 7 It is an optical structure diagram of an ultra-high resolution miniature projection lens provided by Embodiment 2 of the present invention. In this embodiment, the galvanometer (XPR) is not used, and the conventional resolution of 1080P is achieved by adjusting the back intercept. The specific parameters are shown in Table 3:

[0058] table 3

[0059]

[0060] According to the lens parameters described in Table 3, it can be concluded that Figure 7 Micro projection lens shown. Figure 8 It is an image of the MTF of the whole field of view changing with the spatial frequency, and the transfer function MTF of each field of view at the spatial frequency of 93lp / mm>0.45. Figure 9 It is a spot diagram of each field of view. The spot size of each field of view becomes larger due to the existence of spherical aberration, but the RMS of the full field of view is still smaller than the pixel size (5.4μ). Figure 10 In the middle, the image on t...

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Abstract

The invention discloses an ultrahigh-resolution miniature projection lens which comprises a first lens group with a positive focal length, a diaphragm, a second lens group with a positive focal length, a galvanometer, a prism, a diaphragm and a DMD which are arranged in sequence. The first lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged; the second lens group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are sequentially arranged, and the sixth lens, the seventh lens andthe eighth lens are triple bonding lenses. The second lens is a plastic aspheric lens, the tenth lens is a glass aspheric lens, and the other lenses are glass spherical lenses. The first lens, the second lens, the third lens and the triple bonding lenses have negative focal power, and the fourth lens, the fifth lens, the ninth lens and the tenth lens have positive focal power. The miniature projection lens is small in total length, can be compatible with an XPR technology, achieves the 4K ultrahigh resolution, and meets the demands of miniature projection equipment.

Description

technical field [0001] The invention relates to the technical field of WeChat projection lenses, in particular to an ultra-high resolution miniature projection lens. Background technique [0002] The projection lens is the core component of the projection equipment: after the light passes through the reflective or penetrating light modulation device, it needs to be projected to the projection screen through the projection lens for imaging. [0003] As projection equipment plays an increasingly important role in life, it will be applied to more and more fields. More devices need to be embedded with micro-projection devices, and the requirements for projection lenses are getting higher and higher, with smaller sizes and more compact structures. [0004] However, in order to achieve a small size, the resolution of existing projection lenses currently on the market will be reduced, and thus cannot meet the needs of high-resolution users. Contents of the invention [0005] Th...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B13/22G02B1/00G03B21/14
CPCG02B13/0045G02B13/006G02B13/0065G02B13/18G02B13/22G02B1/00G03B21/14
Inventor 何磊
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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