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New megapixels wide-angle lens

A wide-angle lens and pixel technology, applied in the field of wide-angle lens system, can solve the problems of unsuitable lens deformation, serious increase in distortion, heavy weight, etc., and achieve the effects of wide optical characteristics, weight reduction, and cost reduction.

Active Publication Date: 2009-11-25
NINGBO SUNNY AUTOMOTIVE OPTECH
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  • Abstract
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Problems solved by technology

[0002] At present, the wide-angle security monitoring lens on the market is generally composed of 4 to 6 glass lenses. For example, the wide-angle lens with the Chinese Patent No. 200710085652 is composed of 5 glass lenses. When it exceeds 60°, the distortion will increase seriously, so it is not suitable for applications that require high lens deformation, such as network cameras, video conference systems, etc.

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Embodiment Construction

[0034] Embodiments of the present invention will be described in detail below in conjunction with the above-mentioned drawings.

[0035] New megapixel wide-angle lenses such as figure 1 As shown, it is especially used in the security monitoring image system with the field of view ≥ 80°. The optical lens includes a first lens element L1, a second lens element L2, a diaphragm r5, and a third lens element in order from the object side. L3, the fourth lens element L4, the fifth lens element L5, the color filter GF, and the imaging surface IMA.

[0036] The first lens element L1 is a meniscus glass lens with negative refractive power, both sides are spherical, and convex to the object; the second lens element L2 is a plastic with positive refractive power, both sides are aspherical Lens; the third lens element L3 is a biconvex glass lens with positive power and both sides are spherical; the fourth lens element L4 is a plastic lens with negative power and both sides are biconcave a...

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Abstract

A new megapixels wide-angle lens comprises five lenses and a diaphragm; wherein, the lens, from the object space, is orderly provided with a first lens element having meniscus-type lens having negative focal power and projecting to the object space; a second lens element having aspherical lenses having positive focal power; a third lens element having double-convex lens having positive focal power; a fourth lens element having double-convex aspherical lenses having negative focal power; a fifth lens element having lens having positive focal power; the diaphragm is located between the second and third lenses. The invention can realize the wide-angle lens having large relative aperture, small distortion and high resolving power, and can keep the lens in excellent imaging in the wide temperature range of -40 degrees centigrade to +85 degrees centigrade, and is especially suitable for the application of network camera and video conferencing system having higher demand to optics compensation.

Description

technical field [0001] The invention relates to a wide-angle lens system, especially a novel megapixel wide-angle lens suitable for security monitoring, network image and vehicle-mounted image systems. Background technique [0002] At present, the wide-angle security monitoring lens on the market is generally composed of 4 to 6 glass lenses. For example, the wide-angle lens with the Chinese Patent No. 200710085652 is composed of 5 glass lenses. When it exceeds 60°, the distortion will increase seriously, and it is not suitable for applications that require high lens deformation, such as network cameras and video conference systems. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a low-cost, light-weight, small-distortion, large-aperture new type of megapixels that is suitable for higher requirements on lens deformation such as network cameras and video conferencing system...

Claims

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Application Information

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IPC IPC(8): G02B13/06G02B13/18G02B13/00G02B1/00G02B1/04
Inventor 裘文伟
Owner NINGBO SUNNY AUTOMOTIVE OPTECH
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