CN2409572Y

CN2409572Y - Convex lens imaging demonstrator

Info

Publication number: CN2409572Y
Application number: CN 99255842
Authority: CN
Inventors: 周晓平; 陈蕾; 王锡秋
Original assignee: 周晓平
Priority date: 1999-12-10
Filing date: 1999-12-10
Publication date: 2000-12-06
Anticipated expiration: 2009-12-10

Abstract

The utility model provides a simulative demonstration device for the imaging of a convex lens in teaching. The utility model is composed of an imaging object, a convex lens, a display body, slide blocks, a scale and a base, wherein the imaging object, the convex lens and the display body are respectively arranged on the slide blocks which can be moved correspondingly to the base. The imaging object is a rigid body with a fixed shape. The convex lens is a simulacrum, the center of which is provided with a hole. Light rays are composed of straight and thin objects. The display body is a structure object, the size of which can be changed and the shape of which is similar to the imaging object. The scale is fixed to a position corresponding to the slide block of the simulacrum of the convex lens. The utility model can be used for integrally demonstrating the imaging principle of the convex lens to make a student better understand the principle from perception to rationality. The utility model has the advantages of definite imaging, convenient operation, facility and good effect.

Description

Convex lens image-forming demonstration instrument

The utility model relates to a kind of simulation demonstrating apparatus of convex lens imaging teaching.

In the teaching, be the image-forming principle of demonstration convex lens, the demonstrator that adopts generally is made of several major parts of imaging thing, convex lens, display body, slide block, scale and pedestal at present; In order to see real image, the imaging thing adopts the candle of burning to constitute usually, demonstrate with true convex lens, display body or title optical screen in order to imaging are the tabular thing of a rectangle, imaging thing, convex lens, display body are installed in respectively can be on the slide block that pedestal moves, and scale is fixed on the pedestal corresponding position.The deficiencies in the prior art part mainly is: its shape of imaging thing of 1, burning, size are all changing, are not fixing at any time, and its imaging is also uncertain, and the naked light operation exists certain dangerous, dangerous; The more important thing is light that can't see imaging, to the variation of the variation of the trend of light, enantiomer relative position, imaging size, and focus point position etc., all can not provide clear and definite sensation, often need the mapping explanation, do qualitative analysis only, intuitive is poor.2, mirror, be fixed as the relative position relation of, thing, particularly be shown as picture and can only demonstrate a kind of user mode with optical screen, irreversible to carrying out, promptly can not demonstrate other purposes of convex lens, and must in the darkroom, carry out, restricted by environmental baseline, inconvenience is limited to singlely, and effect is relatively poor.

The purpose of this utility model is to avoid weak point of the prior art, and a kind of directly perceived and convex lens image-forming demonstration instrument product that can reversely carry out is provided.

Can take following technical scheme to realize purpose.

Convex lens image-forming demonstration instrument, still constitute by several parts of imaging thing, convex lens, display body, slide block, scale and pedestal, imaging thing, convex lens, display body are installed in respectively can be on the slide block that pedestal moves, but the imaging thing is the rigid body of fixed in shape, convex lens are the porose analogies in center, light constitutes with stick-straight fine material, and display body is variable sizeization, the shape works similar to the imaging thing, and scale is fixed on the corresponding position of convex lens analogies slide block.

Under the prerequisite that satisfies the said structure requirement, specific constructive form, size as for convex lens image-forming demonstration instrument integral body, each funtion part, each zero member, the mode that is connected and fixed between member, position relation etc., all can be according to using needs, take the circumstances into consideration to set, they can both realize purpose, guarantee the usability and the effect of these convex lens image-forming demonstration instrument.

The relative prior art of the technical program has following advantage and effect:

1, can intactly demonstrate out the convex lens image-forming principle, can make student's ratio understand this principle preferably from the perception to the rational faculty, imaging determines that handling safety is reliable; Can see the light of imaging,, can both provide clear and definite sensation, can do quantitative test the variation of the variation of the trend of light, enantiomer relative position, imaging size, and focus point position etc., very directly perceived.

2, mirror, can change as the relative position relation of, thing, can demonstrate the different purposes of convex lens, not restricted by environmental baseline, easy for operation, flexible, effect is better.

In conjunction with the accompanying drawings, embodiment is described in further detail the content of the technical program.

Fig. 1 is a kind of structural representation of convex lens image-forming demonstration instrument;

Fig. 2 is imaging thing, display body structural representation;

Fig. 3 is a kind of structural representation of convex lens analogies center pit;

Fig. 4 is a kind of synoptic diagram of slide block and pedestal matching relationship.

In the convex lens image-forming demonstration instrument, imaging thing 1 can be the rigid body of arbitrary shape, and its shape size can be made into varying type or fixed, and it is transformable triangular structure in accompanying drawing 1,2 illustrated embodiments.Convex lens analogies 2 can adopt steel wire or metal, plank and so on, the circular configuration that the center of making is porose.Display body 3 is variable size adjustment, shape triangular structures similar to the imaging thing.Light 4 can constitute with vertical bamboo let, steel wire or telescopic antenna formula structure; Adhesive sticker, sticking cream etc. can be adopted in junction between light and each object, and are both detachable, reconfigure, and relation can form a fixed connection again.The structure at other position and mutual relationship do not change, can be same as the prior art.According to using needs, imaging thing and display body in this demonstrator can replace mutually, the relation of shifting one's position, the other imaging purposes of demonstration.Scale is fixed on convex lens analogies slide block corresponding position, can move with the convex lens analogies.More flexible.

In the shown convex lens image-forming demonstration instrument, imaging thing 1, display body 3 are to which is provided with scale, extending, the shortening of periphery, and the triangular structure thing that hinge connects into is sentenced at the angle.After adjusting size on demand, available screw 5 is everywhere fixed; Scale is set, amplifies the multiple that dwindles and come into plain view.

During use,, be specified to the position relation of the relative convex lens analogies of picture thing earlier, adjust the size and the relevant position relation of display body then by the demonstration requirement; Horizontal chief ray or title primary optical axis are crossed convex lens analogies center pit or claimed photocentre, and an end and imaging thing, the other end and display body are fixed with sticking cream; Cross convex lens analogies center pit, an end intersects at photocentre with other light and primary optical axis that imaging thing, the other end are connected with display body, and then demonstration is correct; If need, be aided with the light of other position again, more clear and definite.

The usability of accompanying drawing illustrated embodiment, result of use are good.

Claims

1, a kind of convex lens image-forming demonstration instrument, constitute by imaging thing, convex lens, display body, slide block, scale and pedestal, imaging thing, convex lens, display body are installed in respectively can be on the slide block that pedestal moves, it is characterized in that: the imaging thing is the rigid body of fixed in shape, convex lens are the porose analogies in center, light constitutes with stick-straight fine material, and display body is variable sizeization, the shape works similar to the imaging thing, and scale is fixed on convex lens analogies slide block corresponding position.

2, convex lens image-forming demonstration instrument as claimed in claim 1, it is characterized in that: imaging thing, display body are to which is provided with scale, extending, the shortening of periphery, the triangular structure thing that hinge connects into is sentenced at the angle.