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Zoom focusing device and zoom lens

A zoom lens and focusing device technology, applied in the optical field, can solve the problems of increased lens size, difficulty in miniaturizing the lens, and difficulty in having a wide-angle effect, so as to achieve the effect of miniaturization and convenient and smooth installation work

Active Publication Date: 2017-08-08
BOLY MEDIA COMM SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One is a retractable lens with automatic (electric) zoom capability, which generally adopts the structure of a multi-layer sleeve, and is stretched by the sleeve located on the inner layer. Due to the small diameter of the inner layer, it is usually difficult to have a wide-angle effect. If you need to use a wide-angle lens, the multi-layer sleeve will become short and thick, which will greatly limit the zoom factor, and the size of the rear end of the lens will be further increased
[0007] Both types of lenses above are difficult to miniaturize

Method used

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  • Zoom focusing device and zoom lens
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  • Zoom focusing device and zoom lens

Examples

Experimental program
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Effect test

Embodiment 1

[0042] An embodiment of the zoom lens according to the present invention can be referred to Figure 5 , including a first focusing lens barrel 101, a first zoom lens barrel 102, a first ultrasonic motor and a second ultrasonic motor, the structural relationship of which is as described above. In this embodiment, the stator of the first ultrasonic motor is the first fixed cylinder 105, the inner wall of the rotor 103 of the first ultrasonic motor is a polyhedron, each surface is fixed with a piezoelectric material (not shown), the rotor of the first ultrasonic motor The outer wall of the second ultrasonic motor is matched with the inner wall of the first fixed cylinder through threads or friction; the stator of the second ultrasonic motor is also the first fixed cylinder 105, and the outer wall of the rotor 104 of the second ultrasonic motor is a polyhedron, and piezoelectric materials are fixed on each surface (not shown), the inner wall of the rotor of the second ultrasonic m...

Embodiment 2

[0048] Another embodiment of the zoom lens according to the present invention can refer to Figure 7 , compared with Embodiment 1, the main difference is that a first-stage telescopic lens barrel is added.

[0049] Specifically, it also includes a second zoom lens barrel 213 for installing the third zoom lens group 214 that needs to be moved, the second zoom lens barrel is radially fixed, the aperture is larger than the first zoom lens barrel 102, and is compatible with the first focusing lens barrel 101 is coaxially arranged, and the inner wall of the second zoom lens barrel is attached to the outer wall of the first zoom lens barrel; the rotor 104 of the second ultrasonic motor is also used to drive the second zoom lens barrel to move axially, for example, by means of a connecting rod drive , the axially extending connecting rod 215 is fixed on the rotor of the second ultrasonic motor, the side wall of the second zoom lens barrel has a curved chute, and the free end of the s...

Embodiment 3

[0053] Another embodiment of the zoom lens according to the present invention can refer to Figure 8 , including a first focusing lens barrel 101, a first zoom lens barrel 102, a first ultrasonic motor and a second ultrasonic motor, the structural relationship of which is as described above. In this embodiment, the stator of the first ultrasonic motor is the first fixed cylinder 105, the inner wall of the rotor 103 of the first ultrasonic motor cooperates with the outer wall of the first fixed cylinder through threads or friction, and the inner wall of the first fixed cylinder is a polyhedron. A piezoelectric material (not shown) is fixed on each surface; the stator of the second ultrasonic motor is the second fixed cylinder 317, and the outer wall of the rotor 104 of the second ultrasonic motor cooperates with the inner wall of the second fixed cylinder through threads or friction, The outer wall of the second fixed cylinder is a polyhedron, and piezoelectric material is fixe...

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Abstract

A zoom focusing device and a corresponding zoom lens, wherein the zoom focusing device includes a coaxially arranged first focusing lens barrel (101), a first zoom lens barrel (102), a first ultrasonic motor, and a second ultrasonic motor; wherein, The first focusing lens barrel and the first zoom lens barrel are radially fixed, and the aperture of the first zoom lens barrel is larger than the first focusing lens barrel; two ultrasonic motors are used to drive the two lens barrels axially through the rotation of the rotor (103,104) respectively move. Since the zoom lens barrel that needs to be stretched is arranged on the periphery of the focusing lens barrel, and the lens barrel is driven by an ultrasonic motor, the expansion and contraction of the zoom lens barrel and the adjustment of the zoom position can be realized at the same time. The larger diameter of the zoom lens barrel makes it suitable for installation Wide-angle lens, and when installing the lens group from the back to the front, the lens structure gradually increases from the inside to the outside, which makes the installation work more convenient and smooth, and is conducive to the miniaturization of the lens.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a zoom focusing device and a corresponding zoom lens. Background technique [0002] With the promotion and popularization of digital imaging technology, optical imaging devices are widely used in various types of equipment, such as a variety of portable and small devices, and there is a wide demand for miniaturized optical imaging devices. [0003] In order to enable the imaging device to have the ability to precisely adjust the focal length in the case of miniaturization, it has been proposed to use a thread-driven ultrasonic motor (USM, Ultra Sonic Motor) to adjust the focal length (see PCT international application with publication number WO2007118418) and Zooming (referring to the Chinese patent whose publication number is CN102590979A). These techniques can be used to miniaturize zoom lenses, but there is no feasible solution for small zoom lenses that are scalable. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/10
CPCG02B7/10G02B15/144G02B15/143H02N2/10G03B3/10G03B2205/0046G03B2205/0084G02B7/102G03B13/34G02B15/20
Inventor 胡笑平沈霞
Owner BOLY MEDIA COMM SHENZHEN