CN203397033U

CN203397033U - Presbyopic lens

Info

Publication number: CN203397033U
Application number: CN201320451462.6U
Authority: CN
Inventors: 赵留琴; 周图祥
Original assignee: Jiangsu Tian Run Optical Mirror Slip Co Ltd
Current assignee: Jiangsu Tian Run Optical Mirror Slip Co Ltd
Priority date: 2013-07-29
Filing date: 2013-07-29
Publication date: 2014-01-15
Anticipated expiration: 2023-07-29

Abstract

The utility model discloses a presbyopic lens. The presbyopic lens comprises a spherical lens which comprises a front spherical surface and a rear spherical surface, wherein the edge of the front spherical surface and the edge of the rear spherical surface are coincided so as to form a lens edge, and the rear spherical surface is provided with an optical region along the center of the lens; an assembly region is arranged along the edge of the optical region to the edge of the lens and is a conical surface, and a connecting line between any point on the edge of the optical region and the point closest to the edge of the lens is a bus of the conical surface; a central axis of the lens is a rotating shaft of the conical surface, and the thickness of the center of the lens is in direct proportion to the range of the optical region. The presbyopic lens provided by the utility model has the advantages that the condition that the thickness of the center is smallest is guaranteed under the occasion that the edge of the lens of the assembly region is not changed, and the presbyopic lens is beautiful.

Description

A kind of presbyopic lens

Technical field

The utility model relates to a kind of lens, more particularly relates to a kind of presbyopic lens.

Background technology

At present, presbyopic lens is thicker and heavy, and wearer feels very tried, and therefore need to carry out attenuation processing to presbyopic lens, conventionally adopts the method for contract lenses diameter, but the eyeglass of minor diameter is need to be installed to large diameter picture frame time, cannot install.Therefore, must design large diameter specification to meet the assembling of all picture frames, so the center thickness of presbyopic lens just cannot guarantee minimum, increase the weight of eyeglass, and not attractive in appearance.

Summary of the invention

The purpose of this utility model is to provide the presbyopic glass block of a kind of major diameter and center thickness attenuation.

The utility model is achieved by the following technical programs:

A kind of presbyopic lens, for spheric glass, comprise front sphere, rear sphere, the edge of front sphere and the coincident of rear sphere form lens edge, center along eyeglass is provided with optical region at rear sphere, edge along optical region is provided with assembly area between lens edge, assembly area is the conical surface, the bus that on the edge of optical region, on any point and lens edge, the line between nearest point is the conical surface, the central axis of eyeglass is the turning axle of the conical surface, and the center thickness of eyeglass is directly proportional to the scope of optical region.

The utility model, by arranging in the indeclinable situation of lens edge of optical region and ， assembly area, assembly area, guarantees that center thickness is the thinnest, and presbyopic lens is more attractive in appearance.

Advantage and disadvantage of the present utility model, the non-limitative illustration by preferred embodiment below is for illustration and explanation, and these embodiment, only provide as an example with reference to accompanying drawing.

Accompanying drawing explanation

Fig. 1 is front view of the present utility model;

Fig. 2 is right view of the present utility model;

Fig. 3 is the front view that loop diameter is 40mm of opening of the present utility model;

Fig. 4 is the front view that loop diameter is 30mm of opening of the present utility model.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

As shown in Figure 1, the utility model is spheric glass, comprise front sphere 1, rear sphere 2, the coincident of the edge of front sphere 1 and rear sphere 2 forms lens edge 3, center along eyeglass is provided with optical region 21 at rear sphere 2, edge 211 along optical region is provided with assembly area 22 between lens edge 3, assembly area 22 is the conical surface, the bus that on the edge 211 of optical region, on any point and lens edge 3, the line between nearest point is the conical surface, the central axis of eyeglass is the turning axle of the conical surface, the center thickness a of eyeglass is directly proportional to the scope of optical region 21.

Take luminosity as+8.00DS, and the presbyopic lens that center thickness is 8.2mm is embodiment:

Embodiment mono-: as shown in Figure 3, to be 40mm ，Ji Cong center reserve diameter to the direction of lens edge 3 to the diameter of optical region 21 is that the eyeglass of 40mm is viewing area, and center thickness a is 5.2mm.

Embodiment bis-: as shown in Figure 4, to be 30mm ，Ji Cong center reserve to the direction of lens edge 3 the eyeglass viewing area that diameter is 30mm to the diameter of optical region 21, and the edge 211 of optical region to the distance of center of lens diminishes, center thickness a is 4.2mm, thinner than embodiment mono-.

In addition to the implementation, the utility model can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims

1. a presbyopic lens, for spheric glass, comprise front sphere, rear sphere, the edge of described front sphere and the coincident of rear sphere form lens edge, center along eyeglass is provided with optical region at rear sphere, it is characterized in that: the edge along described optical region is provided with assembly area between lens edge, described assembly area is the conical surface, the bus that on the edge of described optical region, on any point and lens edge, the line between nearest point is the conical surface, the central axis of eyeglass is the turning axle of the conical surface, the center thickness of described eyeglass is directly proportional to the scope of optical region.