Optical system

Abstract

The invention discloses an optical system, which sequentially comprises a first lens group (1), a grating (4), a second lens group (2), a third lens group (3) and a light sensing core (7) from the object space to the image space, wherein the integral focal distance of the first lens group (1) is negative, the integral focal distance of the second lens group (2) is positive, the integral focal distance of the third lens group (3) is positive, the distance between the second lens group (2) and the light sensing chip (7) is fixed, the distance between the first lens group (1) and the light sensing chip (7) can be regulated through moving the first lens group (1), and the distance between the third lens group (3) and the light sensing chip (7) can be regulated through moving the third lens group (3).

Description

【Technical field】 [0001] The invention relates to an optical system, in particular to an optical lens system composed of multiple lenses. 【Background technique】 [0002] At present, cameras with a small magnification of less than 10 times generally have such shortcomings: either they have large dimensions or they are not high-definition lenses. This type of lens, while costly, has a small angle and can only produce high-definition images during the day, and the image will be blurred at night, which has great limitations in use. At present, there is no lens that can improve all the above-mentioned various shortcomings in the monitoring lens. [0003] Most of the existing small-magnification zoom monitoring lenses are large in size and expensive. There are few real small-volume, low-cost optical zoom lenses. Even if there are, their resolution cannot reach high-definition, and high-definition imaging cannot be performed day and night. , and the definition is inconsistent dur...

AI Technical Summary

Problems solved by technology

[0002] At present, cameras with a small magnification of less than 10 times generally have such shortcomings: either they have large dimensions or they are not high-definition lenses.

This type of lens, while costly, has a small angle and can only produce high-definition images during the day, and the image will be blurred at night, which has great limitations in use.

At present, there is no lens that can improve all the above-mentioned shortcomings in the surveillance lens

[0003] Most of the existing small-magnification zoom monitoring lenses are large in size and expensive. There are few real small-volume, low-cost optical zoom lenses. Even if there are, their resolution cannot reach high-definition, and high-definition imaging cannot be performed day and night. , and the resolution is inconsistent during the zooming process, that is, the resolution is better at a certain focal length, and the resolution at the next focal length is poor, and the imaging is unstable

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