Optical camera

Abstract

The invention discloses an optical camera which comprises a first lens with negative refraction power, a second lens with positive refraction power, a third lens with refraction power, a fourth lens with refraction power, a fifth lens with negative refraction power and a sixth lens with refraction power in sequence from the object side to the image side along the optical axis of the camera. The object side face of the second lens is a convex face, the image side face of the second lens is a convex face, the position, close to the optical axis, of the object side face of the fifth lens is a convex face, the position, close to the optical axis, of the image side face of the fifth lens is a concave face, the position, outward away from the optical axis, of the concave face of the fifth lens is provided with at least one convex face, the position, close to the optical axis, of the image side face of the sixth lens is a concave face, and the position, away from the optical axis, of the image side face of the sixth lens is provided with at least one inflection point. The optical camera meet the condition that (R51+R52) / (R51-R52) is larger than 1.8 and smaller than 4. By means of the technical scheme, through the reasonable profile structure and proper lens internal distribution, the best optimization is conducted on a system. The large field angle is obtained, the total length of thesystem can be effectively restrained, the current light and portable requirements are met.

Description

Technical field: [0001] The invention relates to the technical field of optical camera products, in particular to an optical camera used in various electronic products. Background technique: [0002] With the recent rapid development of technology, especially electronic technology, mobile and portable electronic devices have been rapidly popularized. The popularity of electronic devices has led to the vigorous development of modules such as optical imaging lenses and impact sensors included in them. At the same time, the application of imaging modules has been more and more widely used, such as smart phones, tablet computers, driving recorders, sports cameras, etc., which are now highly popular. [0003] While bringing great convenience to life, people's requirements for mobile electronic device terminals are getting higher and higher, and they are constantly pursuing more convenient, efficient and high-quality mobile experience, which requires mobile terminals to be thinne...

AI Technical Summary

Problems solved by technology

The traditional five-element lens structure has limitations in terms of refractive power distribution, aberration astigmatism correction, sensitivity distribution, etc., and cannot further meet higher-level imaging requirements

The current mainstream is the further developed six-piece wide-angle imaging optical lens group, but the increase in the number of lenses increases the total length of the lens, which cannot effectively suppress the total length of the lens group

For example, as shown in US Patent No. US20150177484A1, although its F.no aperture value reaches 2.0, which ensures a large amount of light entering the system, its total TTL length cannot be effectively suppressed, reaching 10mm. Moreover, its field of view The maximum angle of view is only 100°, which cannot meet the needs of modern mobile electronic devices for a large field of view in terms of performance; another example is the patent of US Patent No. US9488806. The total length of the system far exceeds 10mm, which cannot meet the needs of miniaturization, and it uses glass materials, which have high requirements for molding, which is not conducive to large-scale mass production

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