CN205139459U

CN205139459U - Magnifying glass for reading

Info

Publication number: CN205139459U
Application number: CN201520920888.0U
Authority: CN
Inventors: 阮立山
Original assignee: WENZHOU MINGFA OPTICAL SCIENCE & TECHNOLOGY Co Ltd
Current assignee: WENZHOU MINGFA OPTICAL SCIENCE & TECHNOLOGY Co Ltd
Priority date: 2015-11-02
Filing date: 2015-11-18
Publication date: 2016-04-06
Anticipated expiration: 2025-11-18
Also published as: CN205404955U

Abstract

The utility model discloses a magnifying glass for reading, which comprises a substrate, be equipped with the fresnel lens of two kind at least different focuses on the base plate. The utility model has the advantages that: possess the fresnel lens of different focuses more than two kinds on a block base board simultaneously, the user can use the long -focus fresnel lens that reads or the short focus fresnel lens of fractionated gain on a large scale according to the reading needs, also only need take a magnifying glass when going on a journey moreover, and it is more convenient to use, and the manufacturing cost of setting so moreover and selling price all will be less than greatly makes two lens.

Description

A kind of reading magnifier

Technical field

The utility model relates to a kind of reading magnifier.

Background technology

Fresnel Lenses (Fresnellens), have another name called Fresnel lens, lens surface one side is light face, the ascending concentric circles of another side imprinting, multiple light-transmission material of good performance can be adopted to make, because it is lightweight, thickness thin quilt is widely used in making magnifier, for old man.

But current Fresnel magnifier all only provides a kind of focal length, and the higher diameter of multiplying power is less, what focal length was long is suitable for reading on a large scale, and the applicable partial enlargement that focal length is little is read, needing to prepare multiple magnifier for different reading condition users, carrying when going out also inconvenient.

Utility model content

The purpose of this utility model is to provide a kind of reading magnifier, effectively can solve existing Fresnel magnifier and can only provide a kind of focal length, can not adapt to the problem of different reading environment.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: a kind of reading magnifier, comprise substrate, described substrate is provided with the Fresnel Lenses of at least two kinds of different focal.

Preferably, substrate is provided with the Fresnel Lenses of two kinds of different focal, is respectively the first Fresnel Lenses and the second Fresnel Lenses; The Fresnel Lenses of general two kinds of different focal just can meet the demand of most of user.

Preferably, the area of described first Fresnel Lenses is greater than the second Fresnel Lenses; First Fresnel Lenses of long-focus can be made into larger size and facilitate large area to watch, and the second Fresnel Lenses is made less area edge and can not be produced virtualization because focal length is shorter.

Preferably, the focal range of described first Fresnel Lenses is 100 ~ 200mm, and the focal range of the second Fresnel Lenses is 60 ~ 80mm; The first Fresnel Lenses is made to obtain comparatively comfortable viewing distance, the viewing area that the second Fresnel Lenses can be tried one's best large while ensureing large enlargement ratio.

Preferably, the area of described second Fresnel Lenses is 1/8 ~ 1/5 of the first Fresnel Lenses area; Make the use of interference first Fresnel Lenses that the second Fresnel Lenses can not be too much.

Preferably, described second Fresnel Lenses is positioned at the first Fresnel Lenses; Can the first Fresnel Lenses as handle when use second Fresnel Lenses.

Preferably, the shape of described second Fresnel Lenses is the one in circle, ellipse or polygon; Multiple style is provided, meets user psychology demand.

Optionally, substrate is provided with the different Fresnel Lenses of four focal lengths, and the different Fresnel Lenses focal length of four focal lengths is respectively 10 ~ 40mm, 40 ~ 80mm, 80 ~ 120mm and 120 ~ 250mm; Most environment can be adapted to.

Preferably, described substrate is PVC board, and the Fresnel Lenses of different focal is all compressing at substrate surface; Adopt PVC board can do thin by the thickness of whole magnifier, adopt pressing mode to ensure ratio of briquetting and the amplification effect of the Fresnel Lenses of different focal simultaneously.

Compared with prior art, the utility model has the advantages that: the Fresnel Lenses simultaneously having two or more different focal on one piece of substrate, relative to common multifocal magnifying lens, overall thickness also can reduce greatly, more frivolous more portable product can be produced, and thickness everywhere keeps basically identical on magnifier, not easy to wear, the Fresnel Lenses maximum visual scope of different focal is also apparently higher than common multifocal magnifying lens, user can use the short focus Fresnel Lenses of long-focus Fresnel Lenses or the partial enlargement read on a large scale according to reading needs, and also only need band magnifier when trip, use convenient, and the production cost arranged like this and selling price all will be significantly less than making two lens.

Accompanying drawing explanation

Fig. 1 is a kind of structural representation read with magnifier of the utility model;

Fig. 2 is structural representation when a kind of reading magnifier of the utility model having the Fei Nier lens of four kinds of different focal.

Embodiment

Consulting Fig. 1 is a kind of embodiment of reading with magnifier of the utility model, in order to show that the Fresnel Lenses of different focal amplifies its concentric circles spacing in figure, a kind of reading magnifier, comprise substrate 1, described substrate 1 is provided with the Fresnel Lenses of two kinds of different focal, be respectively the first Fresnel Lenses 2 and the second Fresnel Lenses 3, the focal range of described first Fresnel Lenses 2 is 100 ~ 200mm, the focal range of the second Fresnel Lenses 3 is 60 ~ 80mm, the area of described second Fresnel Lenses 3 is 1/8 ~ 1/5 of the first Fresnel Lenses area, second Fresnel Lenses 3 surrounds by the first Fresnel Lenses 2 and the second Fresnel Lenses 3 is positioned at the edge of the first Fresnel Lenses 2, the use of the first Fresnel Lenses 2 can not be affected like this, when use second Fresnel Lenses, the first Fresnel Lenses can also use as handle, second Fresnel Lenses 3 can make circle, one in oval or polygon, also cartoon character can be made.

Substrate 1 adopts the light transmissive material such as PVC board, organic glass, and thickness can be thinned to only has 0.3 ~ 2mm, and the first Fresnel Lenses 2 and the second Fresnel Lenses 3 adopt one-step mould compressing on the surface of substrate 1.

During the file that user needs viewing writing smaller, such as medicine bottle or instructions, need enlargement ratio large, the second Fresnel Lenses 3 is used to watch, the first Fresnel Lenses 2 being now positioned at the second Fresnel Lenses 3 periphery can as handle, and user is held in the first Fresnel Lenses 2 and utilizes the second Fresnel Lenses 3 to watch; When a large amount of word such as needs viewing newspaper, magazine etc. time, the first Fresnel Lenses 2 is used to watch, can accomplish to amplify on a large scale, because the font on newspaper is greater than font on medicine bottle, so enlargement ratio also need not be so large, such one piece of substrate 1 has simultaneously the Fresnel Lenses of two kinds of different focal, once molding formed, user can use the short focus Fresnel Lenses of long-focus Fresnel Lenses or the partial enlargement read on a large scale according to reading needs, and also only need band magnifier when trip, use convenient.

Certain substrate also can be arranged the Fresnel Lenses of three kinds, four kinds or multiple different focal, the longer Fresnel Lenses area occupied of its focal length is comparatively large, and the short Fresnel Lenses area occupied of focal length is less.If the focal length that three kinds different, Fresnel Lenses medium for focal length surrounds by the Fresnel Lenses that then focal length is the longest, the minimum Fresnel Lenses of focal length can be surrounded by the Fresnel Lenses that focal length is the longest and also can be surrounded by the Fresnel Lenses that focal length is medium, or the position distribution that three kinds of different focal are random on substrate, can select according to the size of whole substrate, best viewing experience is obtained to make user, if the Fresnel Lenses of more kinds of focal length also will be arranged, with reference to said method, the Fresnel Lenses of little focal length can be arranged on different positions; And in the selection of focal length, focal length can be made all to drop within the scope of 10 ~ 250mm as far as possible, as shown in Figure 2, same substrate arranges the Fei Nier lens of four kinds of different focal, the focal range of four different Fresnel Lenses of focal length is respectively 10 ~ 40mm, 40 ~ 80mm, 80 ~ 120mm and 120 ~ 250mm, to adapt to the conventional living environment of major part.The Fresnel Lenses of different focal can at grade also can be on a different plane.

The foregoing is only specific embodiment of the utility model, but technical characteristic of the present utility model is not limited thereto, any those skilled in the art is in field of the present utility model, and the change done or modification are all encompassed among the scope of the claims of the present utility model.

Claims

1. a reading magnifier, comprise substrate (1), described substrate (1) is provided with the Fresnel Lenses of two kinds of different focal, be respectively the first Fresnel Lenses (2) and the second Fresnel Lenses (3), it is characterized in that: the area of described first Fresnel Lenses (2) is greater than the second Fresnel Lenses (3).

2. a kind of reading magnifier as claimed in claim 1, it is characterized in that: the focal range of described first Fresnel Lenses (2) is 100 ~ 200mm, the focal range of the second Fresnel Lenses (3) is 60 ~ 80mm.

3. a kind of reading magnifier as claimed in claim 2, is characterized in that: the area of described second Fresnel Lenses (3) is 1/8 ~ 1/5 of the first Fresnel Lenses area.

4. a kind of reading magnifier as claimed in claim 2, is characterized in that: the shape of described second Fresnel Lenses (3) is the one in circle, ellipse or polygon.

5. a reading magnifier, comprises substrate (1), it is characterized in that: substrate is provided with the different Fresnel Lenses of four focal lengths, and the focal range of four different Fresnel Lenses of focal length is respectively 10 ~ 40mm, 40 ~ 80mm, 80 ~ 120mm and 120 ~ 250mm.

6. the one reading magnifier as described in claim 1 or 5, is characterized in that: described substrate (1) is PVC board, and the Fresnel Lenses of different focal is all compressing on substrate (1) surface.