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Variable focus optical system

An optical system and variable technology, applied in the field of variable focus optical systems, can solve the problems of large volume and heavy weight of variable focus optical systems

Pending Publication Date: 2022-07-01
SHENZHEN METALENX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem of the large volume and heavy weight of the variable focus optical system in the prior art, the embodiment of the present application provides a variable focus optical system

Method used

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  • Variable focus optical system

Examples

Experimental program
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Embodiment 1

[0143] Exemplarily, the embodiments of the present application provide a variable focus optical system such as Figure 16 and Figure 17 shown. In the variable-focus optical system, the first to third lens groups are all superlenses. Figure 16 and Figure 17The parameters of the variable focus optical system shown include: Entrance Pupil Diameter (EPD, Entrance Pupil Diameter), Short Focal Length (SFL, Short Focal Length), Long Focal Length (LFL, Long Focal Length), and the corresponding field of view ( S-FOV), field of view corresponding to telephoto (L-FOV), back focal length (BFL, Back Focal Length). Figure 16 A schematic structural diagram of the variable focus optical system provided in the embodiment of the present application is shown in a short focal length. Figure 17 A schematic structural diagram of the variable focus optical system provided in the embodiment of the present application at a long focal length is shown. When the zoom optical system is at a long...

Embodiment 2

[0149] Exemplarily, the embodiments of the present application also provide a variable focus optical system such as Figure 20 and Figure 21 shown. In the variable-focus optical system, the first and second lens groups are both superlenses, and the third lens group 30 is a refractive lens. Figure 19 and Figure 20 The parameters of the variable focus optical system shown include: Entrance Pupil Diameter (EPD, Entrance Pupil Diameter), Short Focal Length (SFL, Short Focal Length), Long Focal Length (LFL, Long Focal Length), and the corresponding field of view ( S-FOV), field of view corresponding to telephoto (L-FOV), back focal length (BFL, Back Focal Length). Figure 20 A schematic structural diagram of the variable focus optical system provided in the embodiment of the present application is shown in a short focal length. Figure 21 A schematic structural diagram of the variable focus optical system provided in the embodiment of the present application at a long focal ...

Embodiment 3

[0155] exemplarily, as Figure 7 As shown, the embodiment of the present application further provides a variable focus optical system including a first lens group 10 , a second lens group 20 , a third lens group 30 and a fourth lens group 40 . The parameters of the variable focus optical system are shown in Table 4. Figure 24 and Figure 25 The distribution shows the modulation transfer function diagram of the variable-focus optical system at short focal length and long focal length. It can be seen from the figure that the whole system has good image quality at the cut-off frequency of 200lp / mm.

[0156] To sum up, in the variable focus optical system provided by the embodiments of the present application, at least the second lens group and or the third lens group includes a superlens, and the position of the second lens group on the optical axis can be adjusted, so that the focal length of the system can be adjusted. Continuously adjustable. In the variable-focus optical ...

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Abstract

The embodiment of the invention provides a variable-focus optical system, and belongs to the technical field of optics. The variable-focus optical system sequentially comprises a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group and a sixth lens group from an object side to an image side along an optical path, the position of the second lens group is adjustable in the direction of the optical axis, and the second lens group has negative focal power; the position of the third lens group is fixed, and the third lens group has positive focal power; wherein at least the second lens and / or the third lens comprises a super lens, and the phase of the super lens at least meets any one of the following formulas: r is the coordinates of the super lens in the radius direction, lambda is the working wavelength and is any constant phase, ai, aij and bij are coefficients, (x, y) is the coordinates of the surface of the super lens, and f is the focal length of a single super lens. The optical system promotes miniaturization and weight reduction of a continuous zoom system.

Description

technical field [0001] The present application relates to the field of optical technology, and in particular, to a variable focus optical system. Background technique [0002] Zooming means that the optical system changes the focal length within a certain range, so as to image objects at different distances. [0003] The existing variable-focus optical system can be changed by changing the relative position of each refracting lens group in the system. like figure 1 As shown, the structure of the variable-focus system in the prior art is complex, and the optical path is usually changed by means of a prism and a reflective lens to form a periscope structure, thereby reducing the length of the entire variable-focus system in the optical incident direction, so as to reduce the volume of the system. Purpose. However, as users have higher and higher requirements for imaging quality, the number of lenses in the zoom optical system in the prior art is increasing, the volume is ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14G02B3/08
CPCG02B15/143105G02B3/08
Inventor 郝成龙谭凤泽朱瑞朱健
Owner SHENZHEN METALENX TECH CO LTD