CN204390576U - A kind of optical teaching aid light source and teaching aid - Google Patents

A kind of optical teaching aid light source and teaching aid Download PDF

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Publication number
CN204390576U
CN204390576U CN201520051839.8U CN201520051839U CN204390576U CN 204390576 U CN204390576 U CN 204390576U CN 201520051839 U CN201520051839 U CN 201520051839U CN 204390576 U CN204390576 U CN 204390576U
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China
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light source
laser light
optical
teaching aid
housing
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CN201520051839.8U
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Chinese (zh)
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朱银山
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Abstract

The utility model provides a kind of optical teaching aid light source, it LASER Light Source comprising housing, be arranged on the F light source on the side outer wall of housing and be arranged on enclosure interior, the outer wall of described housing is provided with a through hole passed through for described LASER Light Source, described LASER Light Source comprises the first LASER Light Source and the second LASER Light Source, and described first LASER Light Source and the second LASER Light Source are by adjustable being fixed in housing in stationary installation position.The enclosure interior of described light source is provided with the first LASER Light Source and the second LASER Light Source, light path can be simulated, by simulated laser light source, two bundle LASER Light Source are assembled on optical screen, now student can observe the intersection through water lens and on optical screen of laser optical path on one point intuitively, and by first regulating LASER Light Source, can the imaging of quick adjustment F light source to state the most clearly, the relation of the position of light path plotted point and the sharpness of imaging can be understood, get more information about the image-forming principle of eyes.

Description

A kind of optical teaching aid light source and teaching aid
Technical field
The utility model relates to a kind of physics teaching teaching aid, particularly relates to a kind of optical teaching aid light source.
Background technology
At present in physics teaching and medicine universities and colleges Medical Physics Teaching, teacher upper about " eyes and glasses " this joint content time, teaching material due to existing various version is all the crystalline lens with convex lens simulation eye, when probing into the principle of eye imaging, the picture of far and near different object is become on optical screen, the convex lens will using different focal instead realize, because of equipment restriction, the convex lens finding a focal length suitable are difficult in practical operation, picture is made clearly to become on optical screen, the distance of convex lens and optical screen will be changed, this does not also conform to the practical adjustments of eyes, demonstration myopia and farsightedness lens shapes change when causing focal length variations, and the convex lens also can only using different focal instead realize, and lens shapes change cannot be demonstrated, probe into myopia to be also difficult to picture accurately to become on the retina with presbyopic rectification.
In a word, the experiment equipment provided according to teaching material is tested, because laboratory convex lens used are made up of glass material, its convex curvature immobilizes, student is difficult to perception to lenticular convexity change and contraction of muscle diastole situation, and operation easier is large, experiment effect is not obvious, and this brings very large difficulty to field research.
On the other hand, the light-source box of existing optical teaching aid is only provided with F light source, for demonstrating imaging, and cannot the light path of presentation site light source, inconvenient student gets information about the light path situation of light source, brings much inconvenience to optics teaching.
Utility model content
The utility model does not have pointolite in order to the light-source box solving the above-mentioned existing optical teaching aid mentioned, the shortcoming of very big inconvenience is brought to teaching, a kind of optical teaching aid light-source box is provided, it is provided with LASER Light Source, can the imaging of simulation points light source, and by regulating laser optical path, quick adjustment imaging is state extremely the most clearly, demonstrates the intersection of pointolite and the relation of imaging definition in light path simultaneously.
Concrete, the utility model provides a kind of optical teaching aid light source, it comprises housing, be arranged on the side outer wall of housing for demonstrating the F light source of imaging and being arranged on the LASER Light Source for demonstrating crossing light path and parallel light path of enclosure interior,
The outer wall of described housing is provided with a through hole passed through for described LASER Light Source, described LASER Light Source comprises the first LASER Light Source and the second LASER Light Source, and what described first LASER Light Source and the second LASER Light Source can be regulated by stationary installation position is fixed in housing;
Described stationary installation comprise be arranged on enclosure interior for install the first LASER Light Source the first mounting bracket, for installing the second mounting bracket of the second LASER Light Source, the gearing of connection support and drive transmission thus regulating the stretching device of LASER Light Source position.
Can be preferably, described gearing is four bar gear trains, first end points of described four bar gear trains connects described first mounting bracket, 3rd end points of described four bar gear trains connects described second mounting bracket, the first end of described stretching device connects the second end points of described four bar gear trains, second end of described stretching device connects the 4th end points of described four bar gear trains, and the first end of described stretching device is provided with stretching knob.
Can preferably, described gearing is screw rod, and described first mounting bracket and the second mounting bracket thread bush are located on described screw rod, and described stretching device is the rocking bar sheathed with described screw rod.
Can preferably, the outer setting of described first LASER Light Source and described second LASER Light Source has heating radiator, and described heating radiator inside is provided with cavity, and described first LASER Light Source and described second LASER Light Source are located in described inside cavity.
Can preferably, described F light source is LED light source, and the outside of described LED light source is coated with one deck shading piece.
Can preferably, described light source also comprises the wireless switching for starting or close F light source and/or LASER Light Source.
A kind of teaching aid being provided with light source, it roller comprising casing, be arranged on the support of bottom half and arrange on the bracket, described box house is provided with optical bench, light source, lens and optical screen, described light source, lens and optical screen by Bracket setting on described optical bench
Described lens are pancratic water lens;
Described optical bench is provided with at least one track, makes at least one track-movable in light source, lens and optical screen.
Can be preferably, described water lens comprise Circular mirror frame, rubber hose, syringe, elastic transparent film and Metallic rod, described elastic transparent film is set in described Circular mirror frame and forms seal chamber, the bottom of described cavity connects described syringe by rubber hose, described rubber hose outer cover is provided with Metallic rod, the sidewall of the bottom of described Metallic rod offers through hole, one end of described rubber hose is stretched out from described through hole, Circular mirror frame is fixed in described Metallic rod upper end, and lower end is slidably connected with the track of optical bench by bottom.
Can be preferably, described elastic transparent film comprises the first film and the second film, size and the elasticity of described the first film and the second film are identical, and described the first film and the second film to be set in from two ends respectively described Circular mirror frame and jointly to form described seal chamber with described Circular mirror frame.
Preferably, described optical bench can also be provided with mechanical aperture, described mechanical aperture is arranged between described light source and described water lens.
Can preferably, described optical screen is black optical screen.
Advantage of the present utility model is as described below: the enclosure interior of light source is provided with the first LASER Light Source and the second LASER Light Source, light path can be simulated, by simulated laser light source, two bundle LASER Light Source are assembled on optical screen, or adjustment stationary installation, thus change the position of the first LASER Light Source and the second LASER Light Source, make the first LASER Light Source crossing or parallel with the light path of the second LASER Light Source, thus light path and parallel light path are intersected in simulation.
On the other hand, by regulating stationary installation, regulate the first LASER Light Source and the second LASER Light Source to parastate, namely the light path of two directional lights can be demonstrated, and the light path situation of infinite point light source can be demonstrated, allow student get more information about the crossing light path of the light path of a pointolite, the parallel light path of parallel pointolite and two pointolites.
Size and the elasticity of described the first film and the second film are identical, and described the first film and the second film are set in described Circular mirror frame respectively, when water filling, can ensure that the internal diameter size of the cavity of Circular mirror frame is identical, ensure that the accuracy of experiment.
Described optical screen is set to black optical screen, makes imaging more clear, and can protect the eyes of student, avoids student's eyes to be subject to the stimulation of blank sheet of paper.
Described box house arranges and is coated with shading piece except front panel, is convenient to LASER Light Source demonstration, and makes the imaging of F light source more clear, be convenient to student viewing.
Before water lens, being provided with mechanical aperture, the marginal portion of water lens can be filtered out by mechanical aperture, avoid the marginal portion of water lens to cause imaging unclear, in addition, by adjusting mechanical aperture, can regulate the brightness of imaging.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further explained:
Fig. 1 is the structural representation of light source of the present utility model;
Fig. 2 is the structural representation of optical teaching aid of the present utility model;
Fig. 3 is the structural representation of optical bench of the present utility model;
Fig. 4 is the backsight structural representation of casing of the present utility model;
Fig. 5 be the utility model embodiment 1 the structural representation of stationary installation;
Fig. 6 be the utility model embodiment 2 the structural representation of stationary installation;
Fig. 7 is the structural representation of heating radiator of the present utility model;
Fig. 8 is the structural representation of support of the present utility model;
Fig. 9 is the crossing light path schematic diagram of LASER Light Source of the present utility model; And
Figure 10 is the parallel light path schematic diagram of parallel laser light source of the present utility model.
Embodiment
Below in conjunction with the drawings and the specific embodiments, structure and working principle of the present utility model is further explained:
Concrete, as shown in Figure 1, the utility model provides a kind of optical teaching aid light source, it LASER Light Source comprising housing 51, be arranged on the F light source 52 on the side outer wall of housing 51 and be arranged on housing 51 inside, the outer wall of housing 51 is provided with a through hole 53 passed through for described LASER Light Source, LASER Light Source comprises the first LASER Light Source 54 and the second LASER Light Source 55, first LASER Light Source 54 and the second LASER Light Source 55 by adjustable being fixed in housing 51 in stationary installation position.
As shown in Figure 5 or Figure 6, stationary installation comprise be arranged on housing 51 inside for install the first LASER Light Source 54 the first mounting bracket 56, for installing the second mounting bracket 57 of the second LASER Light Source 55, the gearing 58 of connection support and the stretching device 59 of drive transmission 58.
F light source 5 is LED light source, and the outside of LED light source is coated with one deck shading piece.F light source 5 is that ruddiness or ruddiness and blue light combine.
As shown in Figure 7, the outer setting of the first LASER Light Source 54 and the second LASER Light Source 55 has heating radiator 510, heating radiator 510 by the revolvable installation of turning axle on the securing means, heating radiator 510 inside is provided with cavity 511, the outer setting of heating radiator 510 has louvre 512, and it is inner that the first LASER Light Source 54 and the second LASER Light Source 55 are located in cavity 511.First LASER Light Source 54 and the second LASER Light Source 55 are powered by rechargeable battery, and the voltage of rechargeable battery is the voltage of the rechargeable battery of 3.7V, F light source 52 is 12V.First LASER Light Source 54 and the second LASER Light Source 55 are controlled by wireless electromagnetic switch.
As shown in Figure 2, one is provided with light source optical teaching aid, it roller 3 comprising casing 1, be arranged on the support 2 bottom casing 1 and be arranged on support 2, casing 1 inside is provided with optical bench 4, light source 5, water lens 6 and black optical screen 7, and light source 5, water lens 6 and black optical screen 7 are arranged on optical bench 4 respectively by respective fixed support 8.In remaining embodiment, water lens 6 can be remaining lens.
As shown in Figure 4, casing 1 is rectangular box body, casing 1 comprises front panel 101, rear panel 102, left panel 103, right panel 104, top panel 105 and lower panel 106, front panel 101 is transparent glass panel, rear panel 102, left panel 103, right panel 104, top panel 105 and lower panel 106 are coated with the acrylic board of light shield layer for inside surface, in remaining embodiment, also can be other sheet material, shading piece be black shading film or other shading piece.Rear panel 102 comprises the first panel 1021, second panel 1022 and the 3rd panel 1023, what the first panel 1021 can rotate respectively by twisted axis or hinge 107 with the second panel 1022 is connected with top panel 105, what the 3rd panel 1023 can be rotated by twisted axis 108 is connected with lower panel 106, 3rd panel 1023 is connected by snap close 109 with left panel 103 and right panel 104, in use, open snap close 109, namely the 3rd panel 1023 can be opened, thus conveniently operate in casing 1, when not using, snap close 109 is locked, just the 3rd panel 1023 can be fixed, thus form complete rear panel 102 with the first panel 1021 and the second panel 1022, ensure the leakproofness of casing 1.Also be provided with smog generator in casing 1, for generation of smog, make light path more clear, convenient for student viewing.
As shown in Figure 8, the bottom of casing 1 is provided with support 2, support 2 is telescope support, the coil tension spring 23 that telescope support comprises upper plate 21, lower shoe 22 and is arranged between upper plate 21 and lower shoe 22, passes through pinned connection between upper plate 21, lower shoe 22 and coil tension spring, coil tension spring 23 is connected with regulating shaft 24, regulating shaft 24 end is provided with adjusting knob 25, in use, regulates adjusting knob 25 by turning, coil tension spring 23 can stretch, and just can regulate the height of support.The bottom of support 2 is provided with roller 3, conveniently moves in use.The length of casing is 1.2-1.5m, and width is 0.3-0.6m, and preferably, the length of casing is 1.2m, and width is 0.4m.
As shown in Figure 3, optical bench 4 is provided with at least one track 40, and optical bench 4 is also provided with mechanical aperture, and mechanical aperture is arranged between F light source 5 and water lens 6.In figure 3, optical bench is provided with two tracks, light source 5, mechanical aperture, water lens 6 and black optical screen 7 are slidably arranged on optical bench 4 respectively successively, water lens 6 and black optical screen 7 are fixed on optical bench 4 by fixed support 8, when needing the position adjusting water lens 6 or black optical screen 7, turning on fixed support 8, namely can adjust the position of water lens 6 or black optical screen 7, light source 5 is movably fixed on optical bench 4, conveniently moves at any time.
Water lens 6 comprise Circular mirror frame 61, rubber hose 62, syringe 63, elastic transparent film 64 and Metallic rod 65, elastic transparent film 64 is set in the cavity 66 Circular mirror frame 61 being formed sealing, the bottom of cavity 66 connects syringe 63 by rubber hose 62, rubber hose 62 outer cover is provided with Metallic rod 65, the sidewall of the bottom of Metallic rod 65 offers through hole 67, one end of rubber hose 62 is stretched out from through hole 67.
The top of water lens 6 is fixed with camera, and camera, for taking the imaging on black optical screen 7, facilitates student to observe, camera connects computing machine by USB interface, and by image uploading to computing machine, computing machine is connected with multimedia display screen, watches imaging process on a display screen for student.
Preferably, elastic transparent film 64 comprises the first film 641 and the second film 642, and size and the elasticity of the first film 641 and the second film 642 are identical, and the first film 641 and the second film 642 are set in Circular mirror frame 61 respectively.
Preferably, the thickness of Circular mirror frame 61 is 1cm, and the internal diameter of cavity 66 is 4-6.5cm.Preferably 6.5cm, now imaging is more clear.
Principle of work of the present utility model is as described below:
When demonstrating, as shown in Figure 9, open the 3rd panel 1023, open smog generator, make to be full of smog in casing, conveniently show light path, first F light source is opened, and by regulating the thickness of water lens, make the thickness of observation of students water lens on the impact of imaging definition, secondly by wireless electromagnetic switch, first open the first LASER Light Source 54, allow the transmission of student viewing LASER Light Source, open the second LASER Light Source 55 further, regulate stationary installation, make two light beams angulation be 15 degree or select other angles according to the distance of light source and optical screen, light path is by intersecting at a point after water lens 6, by regulating the thickness of water lens 6, make light path by intersecting at a point on black optical screen 7 after water lens 6, now simulation eye imaging state the most clearly, open F light source 52, F light source 52 demonstrate on black optical screen 7 the most clearly as, student can be clear and intuitive the rendezvous position of observation optical path and imaging whether clearly relation, the principle of further understanding eye imaging.
Afterwards by the thickness of adjustment water lens 6, the presbyopic origin cause of formation can be demonstrated, and demonstrate myopia and presbyopic Crack cause, imaging contexts and antidote by mobile optical screen 7, can be corrected myopia and farsightedness by increase concavees lens and convex lens, convenient for student viewing.
As shown in Figure 10, by wireless electromagnetic switch, first open the first LASER Light Source 54, allow the transmitted light path of student viewing pointolite, open the second LASER Light Source 55 further, regulate stationary installation, two light beams is made to form parallel light path, the state of the observation optical path that student can be clear and intuitive.
Specific embodiment 1:
As shown in Figure 1, the utility model provides a kind of optical teaching aid light source, it LASER Light Source comprising housing 51, be arranged on the F light source 52 on the side outer wall of housing 51 and be arranged on housing 51 inside, the outer wall of housing 51 is provided with a through hole 53 passed through for described LASER Light Source, what LASER Light Source comprised that the first LASER Light Source 54 and the second LASER Light Source 55, first LASER Light Source 54 and the second LASER Light Source 55 can be adjusted by stationary installation position is fixed in housing 51.
As shown in Figure 5, stationary installation comprise be arranged on housing 51 inside for install the first LASER Light Source 54 the first mounting bracket 56, for installing the second mounting bracket 57 of the second LASER Light Source 55, the gearing 58 of connection support and the stretching device 59 of drive transmission 58.
Gearing 58 is four bar gear trains 581, first end points 582 of four bar gear trains 581 connects the first mounting bracket 56,3rd end points 584 of four bar gear trains 581 connects the second mounting bracket 57, the first end 591 of stretching device 59 connects the second end points 583, second end 592 of stretching device 59 connects the 4th end points 585, and the first end 591 of stretching device 59 is provided with stretching knob 593.
In use, by circumgyration stretch knob 593, stretching device 59 drives four bar gear trains 581, thus regulates the position of the first mounting bracket 56 and the second mounting bracket 57, makes the first LASER Light Source 54 and the second LASER Light Source 55 penetrate directional light or crossing light.
F light source 52 is LED light source, and the outside of LED light source is coated with one deck shading piece.F light source 52 is that ruddiness or ruddiness and blue light combine.
As shown in Figure 7, the outer setting of the first LASER Light Source 54 and the second LASER Light Source 55 has heating radiator 510, heating radiator 510 inside is provided with cavity 511, and the outer setting of heating radiator 510 has louvre 512, and it is inner that the first LASER Light Source 54 and the second LASER Light Source 55 are located in cavity 511.First LASER Light Source 54 and the second LASER Light Source 55 are powered by rechargeable battery, and the voltage of rechargeable battery is the voltage of the rechargeable battery of 3.7V, F light source 52 is 12V.Heating radiator 510 is arranged on the first mounting bracket 56 and the second mounting bracket 57 by turning axle is rotatable.
Specific embodiment 2
As shown in Figure 1, the utility model provides a kind of optical teaching aid light source, it LASER Light Source comprising housing 51, be arranged on the F light source 52 on the side outer wall of housing 51 and be arranged on housing 51 inside, the outer wall of housing 51 is provided with a through hole 53 passed through for described LASER Light Source, LASER Light Source comprises the first LASER Light Source 54 and the second LASER Light Source 55, first LASER Light Source 54 and the second LASER Light Source 55 by adjustable being fixed in housing 51 in stationary installation position.
As shown in Figure 6, stationary installation comprise be arranged on housing 51 inside for install the first LASER Light Source 54 the first mounting bracket 56, for installing the second mounting bracket 57 of the second LASER Light Source 55, the gearing 58 of connection support and the stretching device 59 of drive transmission 58.
Can preferably, gearing 58 is screw rod 581, and the first mounting bracket 56 and the second mounting bracket 57 thread bush are located on screw rod 581, and stretching device 59 is the rocking bar 582 be located at fixed cover on screw rod 581.
In use, by pivots rocker 582, drive screw 581, thus the position of the first mounting bracket 56 and the second mounting bracket 57 is regulated, make the first LASER Light Source 54 and the second LASER Light Source 55 penetrate directional light or crossing light.
F light source 52 is LED light source, and the outside of LED light source is coated with one deck shading piece.F light source 52 is that ruddiness or ruddiness and blue light combine.
As shown in Figure 7, the outer setting of the first LASER Light Source 54 and the second LASER Light Source 55 has heating radiator 510, heating radiator 510 inside is provided with cavity 511, and the outer setting of heating radiator 510 has louvre 512, and it is inner that the first LASER Light Source 54 and the second LASER Light Source 55 are located in cavity 511.First LASER Light Source 54 and the second LASER Light Source 55 are powered by rechargeable battery, and the voltage of rechargeable battery is the voltage of the rechargeable battery of 3.7V, F light source 52 is 12V.Heating radiator 510 is arranged on the first mounting bracket 56 and the second mounting bracket 57 by turning axle is rotatable.
Advantage of the present utility model is as described below: the enclosure interior of light source 5 is provided with the first LASER Light Source 54 and the second LASER Light Source 55, light path can be simulated, by simulated laser light source, two bundle LASER Light Source are assembled on optical screen, or adjustment stationary installation, thus change the position of the first LASER Light Source 54 and the second LASER Light Source 55, make the first LASER Light Source 54 crossing or parallel with the light path of the second LASER Light Source 55, thus light path and parallel light path are intersected in simulation.
Optical screen is set to black optical screen, makes imaging more clear, and can protect the eyes of student, avoids student's eyes to be subject to the stimulation of blank sheet of paper.The inner setting except front panel of casing 1 is coated with shading piece, is convenient to LASER Light Source demonstration, and makes F light source 52 imaging more clear, be convenient to student viewing.
Before water lens 6, being provided with mechanical aperture, the marginal portion of water lens 6 can be filtered out by mechanical aperture, avoid the marginal portion of water lens 6 to cause imaging unclear, in addition, by adjusting mechanical aperture, can regulate the brightness of imaging.
Last it is noted that above-described each embodiment is only for illustration of the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or to wherein partly or entirely technical characteristic carry out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.

Claims (9)

1. an optical teaching aid light source, is characterized in that: it comprises housing, be arranged on the side outer wall of housing for demonstrating the F light source of imaging and being arranged on the LASER Light Source for demonstrating crossing light path and parallel light path of enclosure interior,
The outer wall of described housing is provided with a through hole passed through for described LASER Light Source, described LASER Light Source comprises the first LASER Light Source and the second LASER Light Source, and described first LASER Light Source and the second LASER Light Source can adjustably be arranged in housing by stationary installation position;
Described stationary installation comprise be arranged on enclosure interior for install the first LASER Light Source the first mounting bracket, for installing the second mounting bracket of the second LASER Light Source, the gearing of connection support and drive transmission thus regulating the stretching device of LASER Light Source position.
2. optical teaching aid light source according to claim 1, it is characterized in that: described gearing is four bar gear trains, first end points of described four bar gear trains is rotatably connected described first mounting bracket, 3rd end points of described four bar gear trains is rotatably connected described second mounting bracket, the first end of described stretching device connects the second end points of described four bar gear trains, second end of described stretching device connects the 4th end points of described four bar gear trains, and the first end of described stretching device is provided with stretching knob.
3. optical teaching aid light source according to claim 2, is characterized in that: described gearing is screw rod, and described first mounting bracket and the second mounting bracket thread bush are located on described screw rod, and described stretching device is the rocking bar sheathed with described screw rod.
4. the optical teaching aid light source according to Claims 2 or 3, it is characterized in that: the outer setting of described first LASER Light Source and described second LASER Light Source has heating radiator, described heating radiator inside is provided with cavity, and described first LASER Light Source and described second LASER Light Source are located in described inside cavity.
5. optical teaching aid light source according to claim 1, is characterized in that: described F light source is LED light source, and the outside of described LED light source is coated with one deck shading piece.
6. optical teaching aid light source according to claim 5, is characterized in that: described light source also comprises the wireless switching for starting or close F light source and/or LASER Light Source.
7. one kind is provided with the teaching aid of optical teaching aid light source described in claim 1, it is characterized in that: it roller comprising casing, be arranged on the support of bottom half and arrange on the bracket, described box house is provided with optical bench, light source, lens and optical screen, described light source, lens and optical screen by Bracket setting on described optical bench
Described lens are pancratic water lens, described water lens comprise Circular mirror frame, rubber hose, syringe, elastic transparent film and Metallic rod, described elastic transparent film is set in described Circular mirror frame and forms seal chamber, the bottom of described cavity connects described syringe by rubber hose, described rubber hose outer cover is provided with Metallic rod, the sidewall of the bottom of described Metallic rod offers through hole, one end of described rubber hose is stretched out from described through hole, Circular mirror frame is fixed in described Metallic rod upper end, lower end is slidably connected with the track of optical bench by bottom,
Described optical bench is provided with at least one track, makes at least one track-movable in light source, lens and optical screen.
8. teaching aid according to claim 7, it is characterized in that: described elastic transparent film comprises the first film and the second film, size and the elasticity of described the first film and the second film are identical, and described the first film and the second film to be set in from two ends respectively described Circular mirror frame and jointly to form described seal chamber with described Circular mirror frame.
9. teaching aid according to claim 8, is characterized in that: described optical screen is black optical screen.
CN201520051839.8U 2015-01-26 2015-01-26 A kind of optical teaching aid light source and teaching aid Expired - Fee Related CN204390576U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106683548A (en) * 2017-03-05 2017-05-17 苗路成 Multifunctional teaching optical bench light source and light screen
CN112268863A (en) * 2020-10-13 2021-01-26 上海市计量测试技术研究院 Illumination box for calibrating Ringelmann blackness instrument and calibration method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106683548A (en) * 2017-03-05 2017-05-17 苗路成 Multifunctional teaching optical bench light source and light screen
CN112268863A (en) * 2020-10-13 2021-01-26 上海市计量测试技术研究院 Illumination box for calibrating Ringelmann blackness instrument and calibration method

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Granted publication date: 20150610