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Projection lens group, projection optical system and augmented reality equipment

A technology of projection optical system and projection mirror, which is applied in the direction of optics, optical components, instruments, etc., can solve the problem of small field of view of augmented reality equipment, and achieve the effect of solving small field of view and increasing the field of view

Active Publication Date: 2020-03-13
GOERTEK OPTICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a projection lens group, a projection optical system and an augmented reality device, aiming to solve the problem of a small viewing angle of the existing augmented reality device

Method used

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  • Projection lens group, projection optical system and augmented reality equipment
  • Projection lens group, projection optical system and augmented reality equipment
  • Projection lens group, projection optical system and augmented reality equipment

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no. 1 example

[0079] In the first embodiment, the optical system design data are shown in Table 1 below:

[0080] Table 1

[0081]

[0082]

[0083] Wherein, the light incident surface and the light exit surface of the first lens 20 to the fifth lens 60 are all aspheric structures, wherein A4, A6, A8, A10, A12 are aspheric high-order coefficients of the aspheric lens, The details are shown in Table 2.

[0084] Table 2

[0085]

[0086] In the first embodiment, each parameter is as follows:

[0087] The focal length f1 of the first lens 20 is -25.60mm;

[0088] The focal length f2 of the second lens 30 is 12.16mm;

[0089] The focal length f3 of the third lens 40 is 6.88mm;

[0090] The focal length f4 of the fourth lens 50 is -3.17mm;

[0091] The focal length f5 of the fifth lens 60 is 5.02 mm;

[0092] f1 / f3=-3.72; f2 / f4=-3.84; f3 / f5=1.37;

[0093] The lens thickness C1 of the first lens 20 is 1.0 mm;

[0094] The lens thickness C2 of the second lens 30 is 1.2 mm;

[00...

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Abstract

The invention discloses a projection lens group, a projection optical system and augmented reality equipment. The projection lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens along a light transmission direction. The first lens is a lens with negative focal power. The second lens is a lens with positive focal power. The third lens is a lenswith positive focal power. The fourth lens is a lens with negative focal power. The fifth lens is a lens with positive focal power. By employing the projection lens group, the projection optical system and the augmented reality equipment provided by the invention, the problem that the field angle of the existing augmented reality equipment is small is solved.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a projection lens group, a projection optical system and an augmented reality device. Background technique [0002] At present, augmented reality devices based on holographic optical waveguide display technology are mainly composed of prisms, polarization beam splitters, projection mirror groups, and display chips. Among them, the display chips used in the prior art include Digital Light Processing (DLP) display chips And liquid crystal on silicon (Liquid Crystal on Silicon, LCOS) display chip, compared with the augmented reality device composed of DLP display chip, the augmented reality device using LCOS display chip has the advantages of small size and low cost, while the existing LCOS In the augmented reality device of the display chip, since the pixels of the 720P LCOS display chip are low and the field of view is small, it is impossible to achieve high-definition ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/00G02B13/18
Inventor 赵望妮
Owner GOERTEK OPTICAL TECH CO LTD