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Imaging lens

An imaging lens and lens technology, applied in the field of optics, can solve problems such as poor imaging quality, and achieve the effects of uniform image quality, good color and contrast, and high dynamic imaging range

Pending Publication Date: 2020-11-27
舜宇光学(中山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to provide an imaging lens to solve the problem of poor imaging quality

Method used

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Embodiment approach

[0055] Such as figure 1 As shown, according to an embodiment of the present invention, the front fixing group 1 includes: at least two lenses with negative refractive power, and at least two lenses with positive refractive power.

[0056] Such as figure 1 As shown, according to an embodiment of the present invention, the focusing group 2 includes at least one biconvex lens.

[0057] Such as figure 1 As shown, according to an embodiment of the present invention, the rear fixation group 3 includes: at least two lenses with positive refractive power.

[0058] Such as figure 1 As shown, according to an embodiment of the present invention, one of the two positive power lenses in the rear fixed group 3 is a biconvex lens, and the other is a cemented lens.

[0059] Through the above settings, the rear fixed group 3 adopts a double-convex lens with positive refractive power and a cemented lens, which is beneficial to correct chromatic aberration, and at the same time can avoid the...

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Abstract

The invention relates to an imaging lens, which comprises a front fixed group (1), a focusing group (2), a rear fixed group (3) and an optical filter (4) which are sequentially arranged from an objectside to an image side along an optical axis; the focusing group (2) can reciprocate along the optical axis; and the front fixed group (1) has negative focal power, the focusing group (2) has positivefocal power, and the rear fixing group (3) has positive focal power. The imaging lens is finer and smoother in imaging, wider in dynamic imaging range, larger in depth of field, better in color and contrast ratio and wider in application range, and meanwhile, due to the small distortion characteristic of the lens, the view field of the lens is wider, and the large-view-field effect is better.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an imaging lens. Background technique [0002] Machine vision is a comprehensive technology, including image processing, mechanical engineering technology, control, electric light source lighting, optical imaging, sensors, analog and digital video technology, computer software and hardware technology (image enhancement and analysis algorithms, image cards, I / O card, etc.). A typical machine vision application system includes image capture, light source system, image digitization module, digital image processing module, intelligent judgment decision-making module and mechanical control execution module. [0003] With the development of the imaging lens industry, various imaging lenses come out, but these imaging lenses have poor optical resolution and large imaging distortion. Although such imaging lenses have a wide shooting range, their imaging is not delicate enough. The dyn...

Claims

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Application Information

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IPC IPC(8): G02B15/177
CPCG02B15/177
Inventor 胡可欣詹坤河
Owner 舜宇光学(中山)有限公司