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Novel low-cost vehicle backing backsight wide angle lens

A wide-angle lens, low-cost technology, used in vehicle parts, optics, instruments, etc., can solve the problems of only reaching the aperture, poor lens clarity, weak light transmission performance of the lens, etc., and achieve a wide horizontal field of view. The effect of small aperture values

Active Publication Date: 2009-10-21
NINGBO SUNNY AUTOMOTIVE OPTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, low-cost ultra-wide-angle lenses for surveillance and vehicle cameras are generally composed of 4 lens units, such as the wide-angle lens with Chinese patent No. 200710137002 and the wide-angle lens with Chinese patent No. 200610074775.9 , it is composed of 4 lenses, but the clarity of the lens is poor, especially the light transmission performance of the lens is weak, that is, the aperture only reaches FNO2.8

Method used

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  • Novel low-cost vehicle backing backsight wide angle lens
  • Novel low-cost vehicle backing backsight wide angle lens
  • Novel low-cost vehicle backing backsight wide angle lens

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Embodiment Construction

[0033] The embodiments of the present invention will be described in detail below in conjunction with the above-mentioned drawings.

[0034] Embodiments of the new low-cost reversing rear view wide-angle lens of the present invention are as follows: figure 1 As shown, it is especially suitable for the on-board camera system applied to the rear view of the car. The wide-angle lens includes first lens L1, second lens L2, third lens L3, aperture r7, fourth lens L4, color filter GF, and imaging surface IMA from the object side to the image side.

[0035] The first lens L1, which has a negative power and is a meniscus lens convex to the object side, is a glass lens element with spherical surfaces on both sides; the second lens L2, which has a negative power and is convex to the object side The meniscus lens is a plastic lens element with aspheric surfaces on both sides; the third lens L3, a biconvex lens with positive refractive power, is a plastic lens element with aspheric surfa...

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Abstract

The invention discloses a novel low-cost vehicle backing backsight wide angle lens. The lens comprises a first lens element, a second lens element, a third lens element and a fourth lens element which are sequentially arranged from an object; an orifice plate is arranged between the third lens element and the fourth lens element; the first lens element is a meniscus glass lens which has negative focal power and is protruded towards the object; the second lens element, the third lens element and the fourth lens element are plastic lenses; and the six mirror surfaces of the second lens element, the third lens element and the fourth lens element are all of aspheric surfaces. The lens can realize ultra wide angle, large relative aperture and shorter lens height under the conditions that few lens elements are used and the majority of the lenses are made of low-priced plastics, so that the lens is particularly applied to ultra wide angle monitoring systems and vehicle mounted imaging systems.

Description

technical field [0001] The invention relates to a reversing rearview lens system, in particular a novel low-cost reversing rearview wide-angle lens suitable for monitoring, vehicle-mounted cameras and vehicle-mounted image systems. Background technique [0002] At present, low-cost ultra-wide-angle lenses for surveillance and vehicle cameras are generally composed of 4 lens units. For example, the wide-angle lens with Chinese patent number 200710137002 and the wide-angle lens with Chinese patent number 200610074775.9 are composed of 4 lenses, but the lens clarity is poor. In particular, the light transmission performance of the lens is weak, that is, the aperture only reaches FNO2.8. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above-mentioned technical defects and provide a wide-angle lens with low cost, light weight, high optical performance FNO2.0 and better resolution effect, that is, a low-cost and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00B60R1/02
Inventor 裘文伟
Owner NINGBO SUNNY AUTOMOTIVE OPTECH
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