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Lens

A lens and effective area technology, applied in the optical field, to reduce the warpage of the lens

Pending Publication Date: 2022-04-12
GENIUS ELECTRONICS OPTICAL XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a lens, except that there is no bonding line in the optical effective area, and can effectively reduce the problem of lens warping caused by temperature difference

Method used

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Embodiment Construction

[0040] Before starting to describe the present invention in detail, first clearly represent the symbolic description in the accompanying drawings: 10, 10A, 10B, 10C, 10D, 20, 30, 30': lens; 15: first face; 16: second face; 32 : Groove; 100: Optically effective area; 200, 200A, 200B, 200C, 200D: Non-optical effective area; 210, 210': Gate cutting part; 220, 220M: Reference surface; 230, 230A, 230B1, 230B2, 230C1, 230C2, 230D1, 230D2, 230M, 230MA, 230MB1, 230MB2, 230MC1, 230MC2: step structure; 232: side; 234: short arc; 236: long arc; 238: straight edge; 240, 240M: connecting surface ; A: optical axis; ATmax: length; A1: object side; A2: image side; Dpr: distance; L: joint line; M, MA, MB, MC: mold; TC: lens thickness on the optical axis; ODmax : the maximum outer diameter of the lens; θ: the included angle.

[0041] figure 1 is a schematic front view of the lens of the first embodiment of the present invention. figure 2 yes figure 1 sectional schematic diagram. Please re...

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Abstract

A lens comprises an optical effective area and a non-optical effective area. The non-optical effective region surrounds the optical effective region and has a first surface facing an object side and a second surface facing an image side. The non-optically effective region includes a gate cut-off portion connecting the first surface and the second surface. The first surface or the second surface of the non-optical effective area comprises a reference surface, at least one connecting surface and a plurality of segment difference structures. The reference surface is connected with the sprue cutting part. The segment difference structures are concavely arranged between the reference surface and the connecting surface in a staggered manner. The lens satisfies the following conditional expression: 4.000 < = ATmax / Dpr, where ATmax is the length of the orthographic projection of the non-optical effective region on the optical axis, and Dpr is the maximum distance between the reference plane and the segment difference structures in the optical axis direction of the lens. According to the lens, the problem of lens warping caused by temperature difference can be effectively solved except that the optical effective area is not provided with a combination line.

Description

technical field [0001] The invention relates to the field of optics, in particular to a lens. Background technique [0002] Optical lenses are indispensable basic components in optical imaging lenses or optical lens groups. The quality of the optical lens itself will directly affect the optical quality of the optical imaging lens or optical lens group, so how to manufacture a stable and good lens is a project that must be continuously studied for the optical imaging lens or optical lens group. [0003] The optical imaging lenses or optical lens groups of existing portable electronic devices are mostly made of plastic materials by injection molding technology in order to reduce the volume. The principle of injection molding is to use the thermoplasticity of plastic raw materials to first heat and melt the plastic raw materials into a molten fluid, and then inject it into the cavity of the mold through high pressure. Take out after cooling to obtain various special shapes fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00
CPCG02B3/04G02B7/022G02B7/028
Inventor 罗伟仁
Owner GENIUS ELECTRONICS OPTICAL XIAMEN