Imaging lens

Abstract

The invention provides an imaging lens, including lens, drawtube and light absorbing device. Where, the drawtube houses and tightly holds the lens, the light absorbing device and the lens are in turn set in the drawtube in the incident direction, and the light absorbing device is made of black material and has a hole inside itself. The imaging lens is applied to optical imaging devices like cameral, etc, and has better optical property and can effectively weaken stray optical ignal incident into the drawtube.

Description

【Technical field】 [0001] The invention relates to an imaging lens, in particular to an imaging lens applied to optical imaging equipment such as a camera. 【Background technique】 [0002] The imaging lens is used to clearly image the subject on the photosensitive surface. It is one of the most important components of optical imaging equipment such as cameras. The quality of its imaging directly determines the working characteristics of the above imaging equipment. [0003] Please refer to FIG. 1, the existing imaging lens 80 generally includes a plurality of lenses 81, a lens barrel 82 and a diaphragm 83, and the lens barrel 82 is used to accommodate and hold a plurality of lenses 81, which is usually made of a rigid material (such as metal) , The diaphragm 83 is used to limit the imaging range. In actual use, because too much stray light signal 90 passes through the diaphragm 83 and enters the lens barrel 82 , it is reflected to the imaging surface 84 through multiple non-s...

AI Technical Summary

Problems solved by technology

However, the black rough surface in the lens barrel 82 can only absorb part of the incident light signal, and the remaining part of the light signal is diffusely reflected on the black rough surface in the lens barrel 82 (please refer to FIG. Reflected to the imaging surface 84, its light intensity is still relatively large, resulting in limited improvement in image quality

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