Fixed focus digital lens

Abstract

This invention discloses one stationary focus digit lens head, which comprises positive optics first lens, negative optical second lens and positive optical third lens, wherein, the first lens is made of crylic acid; the second lens is made of polycarb; the third lens is made of non-crystal polyolefin transparent plastic and the invention uses each materials to balance the temperature changes.

Description

technical field [0001] The invention relates to a fixed-focus digital lens, in particular to a fixed-focus digital lens which uses a newly designed digital lens device to improve the brightness around the lens and reduce the sensitivity of temperature changes. Background technique [0002] In view of the fact that digital cameras have been widely used in daily life in recent years, especially recently, they have been further used on small image capture devices, such as combined with mobile phones and digital assistants (PDAs), to create humanized and portable Therefore, the engineers are devoting themselves to designing lenses with small size, good quality and low price, so as to meet the needs of the future market. [0003] see figure 1 , is a known digital camera lens device, which has two lenses, from the object side to the image plane, it is an optical lens composed of a positive optical power first lens 10a and a positive optical power second lens 20a, the first lens i...

AI Technical Summary

Problems solved by technology

[0016] When the light passes through the lens and forms an image on the imaging surface, the luminance around the lens is significantly weakened compared with the overall luminance. This is caused by the obvious attenuation of the light around the lens, and the materials of the two lenses are used together. Cannot balance their effects on temperature changes, so as to affect the imaging quality

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