Wide-angle lens

A wide-angle lens and lens technology, applied in the field of wide-angle lenses, can solve the problems of the total length of the lens and the effective focal length, the total length of the lens, the short effective focal length, etc., and achieve the effect of good optical performance, short effective focal length, and short total length.

Active Publication Date: 2022-07-12
SINTAI OPTICAL SHENZHEN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Today's wide-angle lens with a field of view of 180 degrees has a long total lens length and effective focal length, which can no longer meet the current needs. Another wide-angle lens with a new structure is needed to meet the short total lens length and short effective focal length at the same time. and larger field of view

Method used

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  • Wide-angle lens
  • Wide-angle lens
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Examples

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Embodiment Construction

[0030] The invention provides a wide-angle lens, comprising: a first lens group, the first lens group has negative refractive power; a second lens group, the second lens group has a negative refractive power; a third lens group, the third lens group has a positive refractive power the fourth lens group, the fourth lens group has positive refractive power; and the fifth lens group, the fifth lens group has positive refractive power; wherein the first lens group includes a first lens with negative refractive power, and the first lens includes a convex surface toward the object side; wherein the second lens group includes a second lens with negative refractive power; wherein the third lens group includes a third lens with positive refractive power; wherein the fifth lens group includes a sixth lens, and the sixth lens includes a convex surface facing the image side ; Wherein the first lens group, the second lens group, the third lens group, the fourth lens group and the fifth lens...

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Abstract

A wide-angle lens includes a first lens group with negative refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power, and a fifth lens group with positive refractive power. The first lens group includes a first lens. The second lens group includes a second lens. The third lens group includes a third lens. The wide-angle lens meets the following conditions: 7.5<TTL / T 3 <9.6; where, TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, T 3 is the thickness of the third lens on the optical axis.

Description

technical field [0001] The present invention relates to a wide-angle lens. Background technique [0002] Today's wide-angle lenses with a field of view of 180 degrees have long total lens lengths and effective focal lengths, which can no longer meet today's needs. A wide-angle lens with a new structure is required to meet the requirements of short total lens lengths and short effective focal lengths at the same time. and the need for a larger field of view. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the invention is to provide a wide-angle lens with a short overall length, a short effective focal length, and a large field of view in view of the above-mentioned defects of the prior art, but still has good optical performance. [0004] The technical solution adopted by the present invention to solve the technical problem is to provide a wide-angle lens including a first lens group with negative refractive power, a second lens group with negative...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G02B13/00G02B13/06
CPCG02B13/0015G02B13/005G02B13/006G02B13/06G02B9/60G02B13/18G02B9/62
Inventor梁沅汎
OwnerSINTAI OPTICAL SHENZHEN CO LTD