Turn-back zoom lens and unmanned aerial vehicle

A zoom lens, fold-back technology, applied in the optical field, can solve the problems of increasing the length of the lens, difficult to install the lens, etc., and achieve the effect of reducing the volume, increasing the zooming ability, and reducing the interference

Pending Publication Date: 2022-06-24
JIAXING ZHONGRUN OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When a lens needs to be installed in an existing drone, the installed lens is usually small in size, but when the size of the lens is small, the zoom range of the zoom lens is also reduced. In order to increase the optical zoom ratio, the existing technology often It is necessary to expand the movement range of the group, so that the length of the lens will increase accordingly. At the same time, the larger movement range will cause the lens to be equipped with a large-sized motor to provide sufficient group driving force, and the lens will be difficult to install on the drone. middle

Method used

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  • Turn-back zoom lens and unmanned aerial vehicle
  • Turn-back zoom lens and unmanned aerial vehicle
  • Turn-back zoom lens and unmanned aerial vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] like figure 1 and Image 6 As shown, a fold-back zoom lens is composed of a fixed lens group G1 with positive refractive power, a first variable magnification group G2 with negative refractive power, and a negative refractive power group G2 from the object surface side to the image surface side. The focusing lens group G3, the diaphragm STO, the second variable magnification group G4 with positive refractive power, and the reflection component G5 are composed.

[0073] the first variable magnification group G2, the focusing lens group G3 and the second variable magnification group G4 move along the direction of the main optical axis of the fold-back zoom lens;

[0074] The fold-back zoom lens satisfies the following conditional formula:

[0075] TTL<75mm;

[0076] L<55mm;

[0077] Among them, TTL is the total optical length of the fold-back zoom lens, and L is the length of the fold-back zoom lens in the direction of the main optical axis.

[0078] In this embodime...

Embodiment 2

[0118] like Figure 1 to Figure 5 As shown, a fold-back zoom lens is composed of a fixed lens group G1 with positive refractive power, a first variable magnification group G2 with negative refractive power, and a negative refractive power group G2 from the object surface side to the image surface side. The focusing lens group G3, the diaphragm STO, the second variable magnification group G4 with positive refractive power, the reflection component G5, and the auxiliary component G6 are composed.

[0119] The fixed lens group G1 is composed of a first fixed lens a1 with negative refractive power, a second fixed lens a2 with positive refractive power, and a third fixed lens a3 with positive refractive power from the object surface side to the image surface side. A fixed lens a1 and a second fixed lens a2 are cemented.

[0120] The first variable magnification group G2 consists of a first variable magnification lens b1 with negative refractive power, a second variable power lens ...

Embodiment 3

[0155] like Figure 6 to Figure 10 As shown, a fold-back zoom lens is composed of a fixed lens group G1 with positive refractive power, a first variable magnification group G2 with negative refractive power, and a negative refractive power group G2 from the object surface side to the image surface side. The focusing lens group G3, the diaphragm STO, the second variable magnification group G4 with positive refractive power, the reflection component G5, and the auxiliary component G6 are composed.

[0156] The fixed lens group G1 is composed of a first fixed lens a1 with negative refractive power, a second fixed lens a2 with positive refractive power, and a third fixed lens a3 with positive refractive power from the object surface side to the image surface side. A fixed lens a1 and a second fixed lens a2 are cemented.

[0157] The first variable magnification group G2 consists of a first variable magnification lens b1 with negative refractive power, a second variable power lens...

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Abstract

The invention relates to the field of optics, in particular to a turn-back type zoom lens and an unmanned aerial vehicle. The turn-back zoom lens is composed of a fixed lens group with positive focal power, a first zoom group with negative focal power, a focusing lens group with negative focal power, a diaphragm, a second zoom group with positive focal power and a reflection assembly from an object plane side to an image plane side. The first zoom group, the focusing lens group and the second zoom group move along the main optical axis of the turn-back zoom lens; the foldback zoom lens satisfies the following conditional expressions: TTL < 75 mm; l is less than 55 mm; wherein TTL is the total optical length of the turn-back type zoom lens, and L is the length of the turn-back type zoom lens in the main optical axis direction. The total optical length of the turn-back type zoom lens is further reduced, the size of the turn-back type zoom lens is reduced, and the application range of the turn-back type zoom lens is widened.

Description

technical field [0001] The invention relates to the field of optics, in particular to a folding zoom lens and an unmanned aerial vehicle. Background technique [0002] Unmanned aerial vehicle is referred to as "unmanned aerial vehicle", and the English abbreviation is "UAV". [0003] When a lens needs to be installed in the existing drone, the installed lens is usually small in size, but when the size of the lens is small, the zoom range of the zoom lens is also reduced. In order to increase the optical zoom magnification in the existing technology, the It is necessary to expand the movement range of the group, so that the length of the lens increases accordingly. At the same time, the larger movement range will cause the lens to be installed with a large-sized motor to provide sufficient driving force for the group, which makes it difficult to install the lens on the drone. middle. SUMMARY OF THE INVENTION [0004] The present invention will solve the existing technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/177G02B15/14G02B13/00G03B30/00
CPCG02B15/177G02B15/144109G02B13/0065G02B13/009G03B30/00
Inventor 袁浩生蔡平平孙立军黎积刚
Owner JIAXING ZHONGRUN OPTICAL TECH
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