CN213424355U

CN213424355U - Optical magic cup

Info

Publication number: CN213424355U
Application number: CN202022397077.0U
Authority: CN
Inventors: 李渌洁; 刘航; 石晓光; 王英鸿; 王春萌
Original assignee: CHANGCHUN CHINA OPTICAL SCIENCE AND TECHNOLOGY MUSEUM
Current assignee: CHANGCHUN CHINA OPTICAL SCIENCE AND TECHNOLOGY MUSEUM
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-06-11
Anticipated expiration: 2030-10-26

Abstract

The invention discloses an optical magic cup used for displaying the imaging principle of a convex lens, and belongs to optical education instruments. An optical magic cup comprises a cup body, a convex lens and a picture, wherein the picture is drawn on the surface of the picture and placed at the bottom of the cup body; the convex lens is placed in the middle of the cup body, the distance from the convex lens to the bottom of the cup body is equal to the focal length of the convex lens, and waterproof glue is filled in a gap between the cup body and the convex lens. The middle part of the cup body is provided with a gap, and the convex lens is placed in the gap. The convex lens is made of glass. The spectator pours into clear water into the optics magic cup, finds that the picture that can not see shows gradually. The viewer can know the imaging principle of the convex lens through the optical magic phenomenon, the interest and novelty of the optical magic cup are improved, and the purpose of popularizing optical related knowledge is achieved.

Description

Optical magic cup

Technical Field

The invention relates to an optical magic cup used for displaying the imaging principle of a convex lens, and belongs to optical education instruments.

Background

A convex lens is a lens made thicker in the center and thinner at the edges according to the law of refraction of light. Common convex lens forms are bi-convex, plano-convex, meniscus, and the like. The convex lens has the function of converging light and is also called as a converging lens. Presbyopic glasses, telescopes, microscopes all contain a convex lens assembly.

The convex lens can be used as an optical science popularization project and shows the imaging principle and the refraction law of the convex lens to the public. Common convex lens designs include convex lenses, light screens, candles, and the like. Spectators independently adjust the distance between convex lens and the candle, observe the change rule of candle like size, direction on the light screen. Such exhibition items require that audiences have strong knowledge reserves, are difficult to operate, have imaging effects easily influenced by ambient light, reduce participation willingness of the audiences, and are finally not beneficial to popularization of relevant optical knowledge points.

Disclosure of Invention

The invention aims to provide a convex lens exhibition item which is novel, interesting, simple and convenient to operate and obvious in effect.

In order to solve the problems, the invention provides an optical magic cup for displaying the convex lens imaging principle, which comprises a cup body, a convex lens and a picture, wherein the picture is drawn on the surface of the picture and placed at the bottom of the cup body; the convex lens is placed in the middle of the cup body, the distance from the convex lens to the bottom of the cup body is equal to the focal length of the convex lens, and waterproof glue is filled in a gap between the cup body and the convex lens.

As an improvement of the invention, the middle part of the cup body is provided with a gap, and the convex lens is arranged in the gap.

As an improvement of the invention, the convex lens is made of glass.

As an improvement of the invention, the upper surface of the convex lens is filled with clear water.

The distance from the convex lens to the bottom of the cup body is equal to the focal length of the convex lens, and at the moment, the convex lens does not form an image, so that a viewer cannot see the picture on the picture at the bottom of the cup body. Spectator pours into the clear water into to the cup body from cup body oral area, and after the clear water of convex lens top reached certain height, convex lens and clear water had formed the bigger compound lens of a focus in essence, and the distance of compound lens to cup body bottom was less than compound lens's focus this moment, and spectator sees through compound lens and observes the picture, can see upright, enlarged picture. By utilizing the optical magic cup, the audience can observe the magic optical magic phenomenon, understand the imaging principle of the convex lens behind the back, further improve the audience experience effect of the convex lens exhibition item, and achieve the purpose of popularizing the optical relevant knowledge.

Drawings

Fig. 1 is an external view of an optical magic cup.

Fig. 2 is a schematic cross-sectional view of an optical magic cup.

Figure 3 is a cross-sectional view of an optical magic cup before being added with water.

Fig. 4 is a schematic cross-sectional view of an optical magic cup after water is added.

Wherein: 1. the cup comprises a cup body, 11 parts of a notch, 2 parts of a convex lens, 3 parts of clear water, 4 parts of a picture.

Detailed Description

The following describes the mobile magnifier in detail according to the present invention with reference to the accompanying drawings.

In a first embodiment, the optical magic cup has an appearance as shown in fig. 1. An optical magic cup, as shown in fig. 3, comprises a cup body 1, a convex lens 2 and a picture 4. The surface of the picture 4 is drawn with a picture and is placed at the bottom of the cup body 1; convex lens 2 is placed in 4 middle parts of cup body, and the distance of convex lens 2 to 1 bottom of cup body equals convex lens 2's focus, and waterproof glue is filled to the gap between cup body 1 and convex lens 2.

In a second embodiment, as shown in fig. 2, a notch 11 is formed in the middle of the cup body 1, and the convex lens 2 is placed in the notch 11.

In the third embodiment, the convex lens 2 is made of glass.

In the fourth embodiment, as shown in fig. 4, the upper surface of the convex lens 2 is filled with clear water 3.

The specific operation method is as follows, as shown in figure 3, the distance from the convex lens 2 to the bottom of the cup body 1 is equal to the focal length of the convex lens 2, and the audience can not see the picture on the picture 4 at the bottom of the cup body 1. As shown in figure 4, the spectator can inject clear water 3 into the cup body 1 from the mouth of the cup body 1, after the clear water 3 on the upper surface of the convex lens 2 reaches a certain height, the spectator can see the upright and enlarged picture by observing the picture 4 at the bottom of the cup body 1 through the clear water 3 and the convex lens 2.

Claims

1. An optical magic cup comprises a cup body, a convex lens and a picture, and is characterized in that the picture is drawn on the surface of the picture and is placed at the bottom of the cup body; the convex lens is arranged in the middle of the cup body, and the distance from the convex lens to the bottom of the cup body is equal to the focal length of the convex lens; waterproof glue is filled in a gap between the cup body and the convex lens.

2. The optical magic cup according to claim 1, wherein the cup body has a notch in the middle thereof, and the convex lens is placed in the notch.

3. The optical magic cup according to claim 1, wherein the convex lens is made of glass.

4. The optical magic cup according to claim 1, wherein the upper surface of the convex lens is filled with clear water.