CN202736367U

CN202736367U - Variable-focus water lens for student experiments

Info

Publication number: CN202736367U
Application number: CN 201220413002
Authority: CN
Inventors: 曹蕴瑞
Original assignee: SUZHOU ZHENHUA MIDDLE SCHOOL
Current assignee: SUZHOU ZHENHUA MIDDLE SCHOOL
Priority date: 2012-08-20
Filing date: 2012-08-20
Publication date: 2013-02-13
Anticipated expiration: 2022-08-20

Abstract

The utility model relates to a teaching appliance and provides a variable-focus water lens capable of being used on a common optical bench. Based on the image-forming principle, the variable-focus water lens mimics the human eye in the actual condition under which human beings observe near and far objects, while the variable-focus water lens realizes the simulation and remedy of the myopic eye and the presbyopic eye. The water lens instrument mainly comprises a hollow tubular body, a metal hoop collar arranged at the periphery of the sleeve of the tubular body, a rubber tube, a syringe and the like, wherein the two ends of the hollow tubular body are closed. An elastic rubber pad is arranged between the metal hoop collar and the sleeve. The metal hoop collar is provided with a detachable connection piece used for being installed on the mobile part of the optical bench. The variable-focus water lens is especially suitable for physics teaching experiments in middle schools. Through adjusting the water volume in the tubular body, the fundamental functions of both a convex lens and a concave lens can be realized. The variable-focus water lens can also be used for adjusting the convex-concave degree of the lens. The water lens is clear in imaging effect can simulate the adjusting function of the crystalline lens, thereby facilitating the analysis on the image-forming principle of human eyes. The water lens also enables the simulation of visual defects and the demonstration of vision correction.

Description

Student experimenting is with varifocal water lens

Technical field

The utility model relates to a kind of teaching aid, and specifically a kind of varifocal water lens can be used for common optical bench, and the image-forming principle of the far and near object of simulation eye-observation is also carried out myopia and presbyopic simulation and rectification.

Background technology

Physical Experiment is one of requisite important learning ways of Physics Course.In current junior physics course, course content relevant for the rectification of the image-forming principle of human eye and eyesight, because the restriction of condition (equipment of at present secondary school physical optical experiment outfit all is the lens of fixed focal length) can't be simulated the effect that the human lens zoom is regulated, the vision correction of teaching material design also is to replace human eye with ordinary lens, mix long sight and spectacles indirect analysis visual impairment and vision correction principle, use neither intuitively also inconvenient.

Summary of the invention

For addressing the above problem, the utility model purpose is that the varifocal water lens that provide a kind of student experimenting to use, these lens can cooperate that general high school Physical Experiment instrument---optical bench and accessory thereof use jointly.

The utility model is applicable to the physics teaching in secondary school experiment.Can realize the basic function of convex lens and concavees lens by the adjusting of water injection rate in the water lens.Imaging clearly can be simulated the regulatory function of human lens, helps to analyze human eye image-forming principle; Can also carry out the simulation of visual impairment and the rectification of eyesight.

The utility model mainly comprises: the water lens that focal length is adjustable, and the metal lock ring collar, the ordinary syringe that links to each other with the water lens by proofed sleeve forms.

Described water lens are that 40mm, length are that the hollow tubular body of 18-20mm is as inner chamber by diameter, two ends are packaged with the film that transparent elastic material is made, the tubular body top offers water filling port and removable connector is oppositely arranged, diameter is that the plastic tube of 5mm links to each other proofed sleeve for sleeve pipe in succession with water filling port, and the other end of proofed sleeve is communicated with the water delivering orifice of described syringe.

Pipe box periphery along described tubular body is provided with the metal lock ring collar.Be provided with the black elastic rubber fitting between this metal lock ring collar and the described pipe box, mainly contain following effect: 1. fixing and anti-skidding (elastic rubber fitting at water filling port place has the hole of 5mm diameter equally); 2. absorb unnecessary light, imaging is more clear, and is similar with the effect of iris; Be provided be used to the removable connector on the moving member that is installed in optical bench on the described metal lock ring collar.

The water lens that the utility model provides are in when teaching, can utilize syringe to change what of the water yield in the tubular body, thereby change the focal length of water lens, and the simulation human lens is adjusted to the process of picture; Can also on common optical bench, move front and back clear the position of image when convenient simulation myopia and long sight.

Description of drawings

Fig. 1 is front elevation of the present utility model.

Fig. 2 is side view of the present utility model.

Fig. 3 is the side view of the utility model water filling rear mold when intending crystalline lens and becoming protruding.

Fig. 4 is that the utility model cooperates the general high school experiment equipment---the structural representation that optical bench uses can be used for simulating soon lenticular regulatory function during far and near diverse location scenery of people.

Fig. 5 carries out genetic analysis for using the utility model simulation myopia and long sight situation, carries out the structural representation of vision correction demonstration in conjunction with the glasses of the different number of degrees.

Embodiment

Be elaborated below in conjunction with the embodiment of accompanying drawing to assembly structure of the present utility model and the various functions that provides.

As shown in Figure 1, the water lens instrument that provides of the utility model mainly comprises: be provided with elastic rubber fitting (3) between the hollow tubular body of closed at both ends (1), the metal lock ring collar (2), the metal lock ring collar (2) and the described pipe box, be used for being installed in removable connector (4), proofed sleeve (5), syringe (6) on the moving member of optical bench.The two ends of described tubular body (1) are packaged with the film that transparent elastic material is made, the top of described tubular body (1) offers water filling port, one end of described proofed sleeve (5) is communicated with the inner chamber of described tubular body (1) by described water filling port, and the other end of described proofed sleeve (5) is communicated with the water delivering orifice of described syringe (6).Can make it to realize to the convex-concave degree of the interior water filling of tubular body (1) and the change water lens that draw water the function of concavees lens and convex lens by syringe (6), such as Fig. 2 and Fig. 3 operation.

The water lens that the utility model provides can be in conjunction with general high school basic experiment equipment---optical bench uses jointly, the regulating action of simulation human lens.Assembly method such as Fig. 4: the water lens can be contained in the moving slider patrix of optical bench and intend crystalline lens; Optical screen simulation retina; The candle flame is the scenery of eye-observation.The fixing fixed sturcture of water lens and optical screen position simulation human eye, mobile candle flame position, when subject distance changes, by syringe (6) thus the adjusting tubular body water yield change lenticular convexity make present on the optical screen clearly as.Can find to observe nearby scenery needs suitable water filling, the water lens become protruding (it is large that the crystalline lens convexity becomes) thus make be on the retina clearly as; Observe at a distance that scenery need to suitably draw water, make thereby water lens convexity diminishes be on the retina clearly as.The equipment that the utility model provides makes the student probe into human eye image-forming principle to seem directly perceived, clear.

The water lens that the utility model provides can also be used for the simulation of visual impairment and the demonstration of vision correction, and the experiment assembling as shown in Figure 5.Regulate the normal eye position according to the operation of the above-mentioned simulation human eye image-forming principle that provides first.Simulate myopia crystalline lens state by syringe (6) to the interior suitably water filling of the inner chamber of tubular body (1), available a blank sheet of paper moves forward and backward in the optical screen position and finds clearly as forwardly, before can illustrating that myopia is imaged on retina, select suitable glasses to wear to make optical screen (retina) thus on can be clearly as the rectification of simulation eyesight and allow the student understand the optical effect of glasses.In like manner suitably draw water in the tubular body (1) by syringe (6) and can simulate presbyopic imaging and rectification.The difference that the water yield changes can be simulated the different of myopia and long sight degree, and the eyeglass lens power of corresponding rectification is also different.

Claims

1. varifocal water lens, it is characterized in that, these varifocal water lens comprise hollow tubular body (1), proofed sleeve (5) and the syringe (6) of closed at both ends, the two ends of described tubular body (1) are packaged with the film that transparent elastic material is made, the top of described tubular body (1) offers water filling port, one end of described proofed sleeve (5) is communicated with the inner chamber of described tubular body (1) by described water filling port, and the other end of described proofed sleeve (5) is communicated with the water delivering orifice of described syringe (6).

2. varifocal water lens according to claim 1, it is characterized in that, pipe box periphery along described tubular body (1) is provided with the metal lock ring collar (2), is provided with elastic rubber fitting (3) between this metal lock ring collar (2) and the described pipe box.

3. varifocal water lens according to claim 2 is characterized in that, are provided be used to the removable connector on the moving member that is installed in optical bench (4) on the described metal lock ring collar (2).

4. varifocal water lens according to claim 3 is characterized in that, described removable connector (4) is oppositely arranged with described water filling port.

5. varifocal water lens according to claim 1 is characterized in that, the diameter of described tubular body (1) is 40mm, and the body length of described tubular body (1) is 18-20mm.