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Optical system, imaging device, and movable platform

An optical system and dispersion coefficient technology, applied in the optical field, can solve problems such as shallow depth of field, unfavorable product miniaturization, and impact on product endurance, and achieve the effect of reducing product volume

Inactive Publication Date: 2021-07-23
SZ DJI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the large field of view and miniaturized wide-angle lenses on the market are mainly concentrated below the size of the 1 / 2.3 image sensor. If the size of the image sensor needs to be increased, for example, to 1 inch or larger, the following problems need to be solved: After the size of the image sensor is increased, if It is necessary to keep using a large aperture, the depth of field will become shallower, and macro photography cannot be taken into account; if the length of the lens is too large, it is not conducive to the miniaturization of the product, and it will also affect the battery life of the final product

Method used

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  • Optical system, imaging device, and movable platform
  • Optical system, imaging device, and movable platform
  • Optical system, imaging device, and movable platform

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0034] Some implementations of the present application will be described in detail below in conjunction with the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] It should also be understood that the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. A...

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Abstract

The invention provides an optical system (100), an imaging device (200), and a movable platform (300), the optical system (100) including a first lens (101), a second lens (102), a third lens (103), a fourth lens (104), a fifth lens (105), a sixth lens (106), and a seventh lens (107) arranged in order from an object side to an image side, the first lens (101) and the fifth lens (105) having negative refractive power, the second lens (102), the third lens (103), the fourth lens (104), the sixth lens (106) and the seventh lens (107) have positive focal power; the optical system (100) satisfies the following expressions:-8 < f1 <-5, 20 < f2 < 30, 16 < f3 < 24, 5 < f4 < 8,-8 < f5 <-5, 10 < f6 < 15, 70 < f7 < 90, 0.2 < = f / TTL < = 0.32; wherein f is the focal length of the optical system (100), f1 to f7 are the focal lengths of the first lens (101) to the seventh lens (107), respectively, and TTL is the distance on the optical axis from the center of the lens surface of the first lens (101) close to the object side to the imaging surface.

Description

technical field [0001] The present application relates to the field of optical technology, and in particular to an optical system, a photographing device using the optical system, and a movable platform. Background technique [0002] With the development of technology, lenses with miniaturization, high image quality, low cost and large field of view are more and more popular. At present, the large field of view and miniaturized wide-angle lenses on the market are mainly concentrated below the size of the 1 / 2.3 image sensor. If the size of the image sensor needs to be increased, for example, to 1 inch or larger, the following problems need to be solved: After the size of the image sensor is increased, if It is necessary to keep using a large aperture, and the depth of field will become shallow, which cannot take into account macro photography; if the length of the lens is too large, it is not conducive to the miniaturization of the product, and it will also affect the battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/06
CPCG02B13/0015G02B13/0045G02B13/06
Inventor 毛庆
Owner SZ DJI TECH CO LTD