Optical system

An optical system and optical axis technology, applied in the field of optical systems, can solve the problems of unfavorable lens miniaturization, poor imaging quality, large distortion, etc., and achieve the effect of meeting the needs of depth recognition projection

Active Publication Date: 2019-02-19
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the number of lenses will lead to an increase in the total optical length of the projection lens, which is not conducive to the miniaturization of the lens
In addition, the general large field of view projection lens also has many problems such as large distortion and poor imaging quality, which cannot meet the requirements of encoded structured light depth recognition technology for projection lenses

Method used

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Embodiment 1

[0073] Refer to the following Figure 1 to Figure 2C An optical system according to Embodiment 1 of the present application is described. figure 1 A schematic structural diagram of an optical system according to Embodiment 1 of the present application is shown.

[0074] Such as figure 1 As shown, the optical system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the imaging side to the image source side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 and fifth lens E5.

[0075]The first lens E1 has positive refractive power, its near imaging side S1 is convex, and its near image source side S2 is concave; the second lens E2 has positive refractive power, its near imaging side S3 is concave, and its near image source side S4 is convex; The third lens E3 has negative refractive power, its near imaging side S5 is concave, and its near image source side S6 is convex; th...

Embodiment 2

[0102] Refer to the following Figure 3 to Figure 4C An optical system according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. image 3 A schematic structural diagram of an optical system according to Embodiment 2 of the present application is shown.

[0103] Such as image 3 As shown, the optical system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the imaging side to the image source side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 and fifth lens E5.

[0104] The first lens E1 has positive refractive power, its near imaging side S1 is convex, and its near image source side S2 is concave; the second lens E2 has positive refractive power, its near imaging side S3 is convex, and its near image source side S4 is con...

Embodiment 3

[0116] Refer to the following Figure 5 to Figure 6C An optical system according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical system according to Embodiment 3 of the present application is shown.

[0117] Such as Figure 5 As shown, the optical system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the imaging side to the image source side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 and fifth lens E5.

[0118] The first lens E1 has positive refractive power, its near imaging side S1 is convex, and its near image source side S2 is concave; the second lens E2 has positive refractive power, its near imaging side S3 is concave, and its near image source side S4 is convex; The third lens E3 has negative refractive power, its near imaging side S5 is concave, and its near image source side S6 is convex;...

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Abstract

The present application discloses an optical system. The optical system comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in order from the imaging side to the imagesource side along the optical axis. The first lens has a positive focal power, and the near image source side thereof is a concave surface. The second lens has a positive focal power, and the near image source side thereof is a convex surface. The third lens has a negative focal power, and the near image source side thereof is a convex surface. The fourth lens has a focal power, and the near imaging side thereof is a concave surface. The fifth lens has a focal power. The distance Tr5r8 of the near imaging side of the third lens to the near image source side of the fourth lens on the optical axis and the center thickness CT5 of the fifth lens on the optical axis satisfy 1.2<Tr5r8 / CT5<2.3.

Description

[0001] Divisional Application Statement [0002] This application is a divisional application of the Chinese invention patent application with the title of "Optical System" and application number 201810297721.1 submitted on March 30, 2018. technical field [0003] The present application relates to an optical system, and more particularly, the present application relates to an optical system including five lenses. Background technique [0004] In recent years, with the rapid development of depth recognition technology, the three-dimensional position and size information of the target object can be obtained by using the three-dimensional depth camera, which is of great significance in the application of augmented reality (AR) technology. [0005] Coded structured light technology is one of the important branches of depth recognition technology. Its technical principle is: use the projection lens module to project a specially coded image onto the target object; use the imaging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/06
CPCG02B13/0045G02B13/06G02B13/18G02B13/16
Inventor 黄林娄琪琪
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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