Digital camera lens

Abstract

The invention discloses a digital camera lens, including from object to image: a first lens, which is a biconvex spherical lens made of glass; a second lens, which is a biconcave lens made of glass; a third crescent lens, which includes double non-spherical surfaces made of PMMA a fourth crescent double non-spherical surface made of PMMA; and a fine-tuning structure between the third and the fourth lenses to adjust the level distance. The the digital camera lens of the invention adopts 2G2P structure; wherein, 2P is a plastic double non-spherical surface while 2G is a glass spherical surface. Therefore, the invention can effectively amend a variety of optical aberrations and achieve high pixel requirement of lens; more importantly, the design, through optical spacing adjustment, can effectively eliminate the error caused by the non-spherical production process, greatly decrease the requirements of non-spherical injection molding process and smoothly achieve the mass production under the present technology and production conditions in China.

Description

technical field [0001] The invention relates to a digital camera lens, in particular to a fixed-focus digital camera lens matched with a high-pixel image sensor. Background technique [0002] With the development of multimedia imaging technology, digital cameras and video cameras are more and more favored by consumers. People pursue miniaturization, clear imaging and cheap prices for digital cameras. Therefore, it is necessary to design and manufacture lenses that can meet the above requirements . [0003] Under the current technical conditions, aspheric lenses are usually used to obtain digital camera lenses that can meet the above requirements, because aspheric lenses can partially reduce the aberrations caused by spherical lenses in the lens, and at the same time reduce the lens volume, and at the same time achieve Better optical performance. At present, Japan, Taiwan and other digital camera lenses use a large number of aspheric lens technology, because their aspheric ...

AI Technical Summary

Problems solved by technology

At present, Japan, Taiwan and other digital camera lenses use a large number of aspheric lens technology, because their aspheric mold processing and injection molding technology are relatively mature, but in mainland China, because the aspheric lens processing technology is not very mature, and Generally, digital camera lenses have high requirements on the accuracy of aspheric lenses. Therefore, under the current technical level in China, it is possible to design and manufacture digital camera lenses that take advantage of the advantages of aspheric surfaces and can be mass-produced. problem to be solved

For example, there are processing errors in the manufacturing process of plastic lenses, and if they are directly used to assemble the lens, it will inevitably cause a decline in imaging quality and cannot be used, so further improvement is needed

[0004] The Chinese patent "digital camera lens" whose patent number is 200410026704.2 has a very good improved design, but because the number of lenses is only three, the number of images caused by the lens is only about 1.3 million, which cannot satisfy the requirements at all. The needs of current digital cameras have not taken into account the processing error caused by the use of plastic lenses, so there are inevitably similar technical problems as above

Images