CN104916198A - Self-focusing lens light-concentrating principle simulation demonstration device and experimental method - Google Patents
Self-focusing lens light-concentrating principle simulation demonstration device and experimental method Download PDFInfo
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- CN104916198A CN104916198A CN201510358622.6A CN201510358622A CN104916198A CN 104916198 A CN104916198 A CN 104916198A CN 201510358622 A CN201510358622 A CN 201510358622A CN 104916198 A CN104916198 A CN 104916198A
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Abstract
The invention provides a self-focusing lens light-concentrating principle simulation demonstration device. A base is equipped with a transparent water tank with water inside. The right outer side face of the transparent water tank is provided with a white paint layer. The back base outside the transparent water tank is provided with a semiconductor refrigeration chip bracket which is provided with a semiconductor refrigeration chip immersed in the water. The distance between the lower surface of the semiconductor refrigeration chip and the bottom of the water tank is at least 70mm. The front side face of the semiconductor refrigeration chip is a hot face and is perpendicular to a horizontal plane. The laser bracket of a semiconductor laser is installed at the left side on the base outside the transparent water tank. The divergent laser beam with the divergent angle of 15 degrees to 20 degrees emitted by the semiconductor laser goes through the bottom center of the semiconductor laser to be projected to the white paint layer to form a round light spot. The structure of the simulation demonstration device is simple, the speed of establishing a refractive index symmetry decreasing gradient change light-concentrating area is fast, a gradient temperature field direction is stable, a demonstration effect is obvious and intuitive, and the device can be used as an optical demonstrations and experimental instrument.
Description
Technical field
The invention belongs to experiment teaching demonstration instrument device technical field, be specifically related to GRIN Lens concentrating light principles simulation demonstrating apparatus.
Background technology
The gathering of luminous energy is one of basic problem of optics and correlation technique application thereof.Spot mode is divided into reflecting condensation method and transmission refraction condensation method.The basic skills of reflecting condensation utilizes concave mirror optically focused, and concave mirror is divided into again spherical concave and convex mirrors and parabola concave mirror, applies quite extensive.The main element adopted in transmission refraction condensation method is collector lens.Collector lens is the primary element in the fields such as scientific research, applied optics, Laser Processing, optical communication, Solar use.French physician Fresnel is applied widely with its distinctive structure and characteristics at the Fresnel Lenses of invention in 1822, becomes basic optical element already.Well-known Fresnel Lenses is structurally the distortion of traditional convex lens geometric configuration, and still belong to transmission refraction process, the understanding of student to its principle does not have difficulty.
The self-focusing rod lens of the invention sixties in last century, due to its uniqueness optical characteristics and can with semiconductor laser 1 and light transmitting fiber perfect adaptation, be applied widely in the transmission of the optical informations such as optical fiber communication, Fibre Optical Sensor, optical instrument, Medical Instruments and context of detection.The concentrating light principles of GRIN Lens, curve transmission in the material changed at refractive index gradient based on light, but the size of the GRIN Lens that can produce at present is still very little, be difficult to, intuitively to the track of light in GRIN Lens, add the difficulty in student's understanding.Therefore a kind of GRIN Lens concentrating light principles experimental demonstration device is developed significant.
Summary of the invention
A technical matters to be solved by this invention be to provide a kind of reasonable in design, structure simple, demonstrating effect GRIN Lens concentrating light principles simulation demonstrating apparatus intuitively.
Another technical matters to be solved by this invention is to provide a kind of experimental technique using GRIN Lens concentrating light principles simulation demonstrating apparatus.
Solving the problems of the technologies described above adopted technical scheme is: on base, arrange the transparent sink built with water, the right outside side of transparent sink length direction is coated with white skin of paint, rear portion base outside transparent sink is provided with semiconductor refrigerating plate rack, semiconductor refrigerating plate rack is provided with water-immersed semiconductor chilling plate, distance bottom semiconductor chilling plate lower surface screw clamp is at least 70mm, the leading flank of semiconductor chilling plate is hot side or huyashi-chuuka (cold chinese-style noodles), and and horizontal plane, left side on base outside transparent sink arranges the laser stent being provided with semiconductor laser, the angle of divergence of semiconductor laser outgoing is that the divergent laser beam of 15 ° ~ 20 ° passes through immediately below semiconductor chilling plate, on white skin of paint, projection forms circular light spot.
The geometric configuration of transparent sink of the present invention and semiconductor chilling plate is rectangular parallelepiped, and the hot side of semiconductor chilling plate is parallel with the length sidewall of transparent sink.
The angle of divergence of semiconductor laser emergent light of the present invention is that the central plane of the divergent beams center line of 15 ° ~ 20 ° and semiconductor chilling plate thickness is in same plane.
Angle of divergence the best of semiconductor laser emergent light of the present invention is that the central plane of the divergent beams center line of 18 ° and semiconductor chilling plate thickness is in same plane.
The experimental technique of above-mentioned GRIN Lens concentrating light principles simulation demonstrating apparatus is used to be made up of following step:
1) the emergent light direction and the angle of divergence that adjust semiconductor laser are 15 ° ~ 20 °, make the laser beam of semiconductor laser outgoing by immediately below semiconductor chilling plate, be incident upon on white skin of paint, white skin of paint is observed the homogeneity of at this moment circular light spot brightness;
2) connect semiconductor chilling plate power supply, observe the situation of change of vertical light band and the vertical light band both sides brightness that white skin of paint is formed in circular light spot.
The present invention by energising semiconductor chilling plate vertical hanging in water, semiconductor chilling plate huyashi-chuuka (cold chinese-style noodles) is utilized constantly to inhale thermogenetic cold flow thin layer in bottom of gullet transition process, the gradient temperature field that between the water that cold flow thin layer and both sides are in normal temperature state, heat interchange is formed, the rule forming the refractive index Rearrangments change of water in cold flow thin layer both sides is similar to GRIN Lens refractive index radial variations rule, establishes the light-collecting area of demonstration GRIN Lens concentrating light principles necessary refractive index Rearrangments graded.Utilize the laser beam of dispersing along semiconductor chilling plate length direction simultaneously, through cold flow thin layer both sides formed water refractive index Rearrangments region of variation time, the optically focused effect that the light of cold flow both sides is formed to cold flow thin layer deviation, achieves the simulation ocular demonstration of GRIN Lens concentrating light principles.The GRIN Lens concentrating light principles simulation demonstrating apparatus of this structure, simple, set up refractive index Rearrangments graded light-collecting area in water the speed of structure is fast, gradient temperature field direction is stablized, demonstrating effect is obvious, directly perceived, can be used as optical demo and experimental apparatus.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Fig. 2 is the photo of semiconductor chilling plate 4 circular light spot when not being energized.
Fig. 3 is the photo after semiconductor chilling plate 4 is energized, circular light spot being formed vertical light band.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in more detail, but the invention is not restricted to these embodiments.
Embodiment 1
In FIG, the GRIN Lens concentrating light principles simulation demonstrating apparatus of the present embodiment is made up of semiconductor laser 1, transparent sink 2, semiconductor refrigerating plate rack 3, semiconductor chilling plate 4, white skin of paint 5, laser stent 6, base 7 connection.
Base 7 is placed with transparent sink 2, transparent sink 2 adopts organic glass to make, also quartz glass can be adopted to make, the geometric configuration of transparent sink 2 is rectangular parallelepiped, the in-built full water of transparent sink 2, the right outside side of transparent sink 2 is coated with white skin of paint 5, and white skin of paint 5 is for showing the shape of projected spot.Rear portion base 7 outside transparent sink 2 is placed with semiconductor refrigerating plate rack 3, semiconductor refrigerating plate rack 3 is hung with semiconductor chilling plate 4, semiconductor chilling plate 4 is immersed in the water, the geometric configuration of semiconductor chilling plate 4 is rectangular parallelepiped, the leading flank of semiconductor chilling plate 4 is hot side, polarity is connected by the power supply switching semiconductor chilling plate 4, also the leading flank of semiconductor chilling plate 4 can be made to be huyashi-chuuka (cold chinese-style noodles), the hot side of semiconductor chilling plate 4 and horizontal plane, hot side is parallel with the front side wall of transparent sink 2, upper surface and plane-parallel, distance bottom semiconductor chilling plate 4 lower surface to transparent sink 2 is 70mm, concrete distance bottom semiconductor chilling plate 4 lower surface screw clamp specifically should be determined according to the height of glass flume.
On base 7, the left side of transparent sink 2 is placed with laser stent 6, laser stent 6 is provided with semiconductor laser 1, semiconductor laser 1 can rotate on semiconductor laser 1 support, semiconductor laser 1 is for generation of laser, the emergent light direction of semiconductor laser 1 and the angle of divergence adjustable, the angle of divergence of the present embodiment semiconductor laser 1 emergent light is that the central plane of the divergent beams center line of 18 ° and semiconductor chilling plate 4 thickness is in same plane, the laser beam that semiconductor laser 1 outgoing is dispersed is passed through immediately below semiconductor chilling plate 4, on white skin of paint 5, projection forms circular light spot.
Use the experimental technique step of the GRIN Lens concentrating light principles simulation demonstrating apparatus of the present embodiment as follows:
1, the emergent light direction and the angle of divergence that adjust semiconductor laser 1 are 18 °, make the laser beam of semiconductor laser 1 outgoing by immediately below semiconductor chilling plate 4, be incident upon on white skin of paint 5, white skin of paint 5 observed the homogeneity of at this moment circular light spot, as shown in Figure 2.As seen from Figure 2, in transparent sink during even water temperature, the circular light spot of formation is uniform.
2, connect semiconductor chilling plate 4 power supply, observe the situation of change of vertical light band and the vertical light band both sides brightness that white skin of paint 5 is formed in circular light spot, as shown in Figure 3.As seen from Figure 3, circular light spot forms a vertical light band, the brightness of vertical light band both sides obviously declines, and illustrates that the light of vertical light band both sides is assembled to vertical light band place, analyzes and forms the mechanism of this phenomenon and the similarity of GRIN Lens concentrating light principles.
Embodiment 2
Rear portion base 7 outside transparent sink 2 is placed with semiconductor refrigerating plate rack 3, semiconductor refrigerating plate rack 3 is hung with semiconductor chilling plate 4, semiconductor refrigerating plate rack 3 and semiconductor chilling plate 4 are immersed in the water, the geometric configuration of semiconductor chilling plate 4 is rectangular parallelepiped, the leading flank of semiconductor chilling plate 4 is hot side, the hot side of semiconductor chilling plate 4 and horizontal plane, hot side are parallel with the front side wall of transparent sink 2, upper surface and plane-parallel, and the distance bottom semiconductor chilling plate 4 lower surface to transparent sink 2 is 70mm.The connecting relation of other parts and parts is identical with embodiment 1.On base 7, the left side of transparent sink 2 is placed with laser stent 6, laser stent 6 is provided with semiconductor laser 1, the angle of divergence of the present embodiment semiconductor laser 1 emergent light is 15 °, the central plane of divergent beams center line and semiconductor chilling plate 4 thickness is in same plane, the laser beam that semiconductor laser 1 outgoing is dispersed is passed through immediately below semiconductor chilling plate 4, and on white skin of paint 5, projection forms circular light spot.The connecting relation of other parts and parts is identical with embodiment 1.
Use the experimental technique step of the GRIN Lens concentrating light principles simulation demonstrating apparatus of the present embodiment as follows:
In step 1, emergent light direction and the angle of divergence of adjustment semiconductor laser 1 are 15 °, make the laser beam of semiconductor laser 1 outgoing by immediately below semiconductor chilling plate 4, be incident upon on white skin of paint 5, white skin of paint 5 is observed the homogeneity of at this moment circular light spot brightness.Step 2 is identical with embodiment 1.
Embodiment 3
Rear portion base 7 outside transparent sink 2 is placed with semiconductor refrigerating plate rack 3, semiconductor refrigerating plate rack 3 is hung with semiconductor chilling plate 4, semiconductor refrigerating plate rack 3 and semiconductor chilling plate 4 are immersed in the water, the geometric configuration of semiconductor chilling plate 4 is rectangular parallelepiped, the leading flank of semiconductor chilling plate 4 is hot side, the hot side of semiconductor chilling plate 4 and horizontal plane, hot side are parallel with the front side wall of transparent sink 2, upper surface and plane-parallel, and the distance bottom semiconductor chilling plate 4 lower surface to transparent sink 2 is 80mm.The connecting relation of other parts and parts is identical with embodiment 1.On base 7, the left side of transparent sink 2 is placed with laser stent 6, laser stent 6 is provided with semiconductor laser 1, the angle of divergence of the present embodiment semiconductor laser 1 emergent light is 20 °, the central plane of divergent beams center line and semiconductor chilling plate 4 thickness is in same plane, the laser beam that semiconductor laser 1 outgoing is dispersed is passed through immediately below semiconductor chilling plate 4, and on white skin of paint 5, projection forms circular light spot.The connecting relation of other parts and parts is identical with embodiment 1.
Use the experimental technique step of the GRIN Lens concentrating light principles simulation demonstrating apparatus of the present embodiment as follows:
In step 1, emergent light direction and the angle of divergence of adjustment semiconductor laser 1 are 20 °, make the laser beam of semiconductor laser 1 outgoing by immediately below semiconductor chilling plate 4, be incident upon on white skin of paint 5, white skin of paint 5 is observed the homogeneity of at this moment circular light spot brightness.Step 2 is identical with embodiment 1.
Principle of work of the present invention is as follows:
After the semiconductor chilling plate 4 be dipped in water is energized, semiconductor chilling plate 4 huyashi-chuuka (cold chinese-style noodles) constantly absorbs heat, the water contacted with huyashi-chuuka (cold chinese-style noodles) is by absorbing and cooling temperature, water-mass density after cooling increases, under gravity to flowing, the water being in normal temperature state near huyashi-chuuka (cold chinese-style noodles) adds to again on the huyashi-chuuka (cold chinese-style noodles) of semiconductor chilling plate 4, and the huyashi-chuuka (cold chinese-style noodles) forming semiconductor chilling plate 4 with this constantly has cold water to flow in the water below semiconductor chilling plate 4.Along the cold water flowed downward at the huyashi-chuuka (cold chinese-style noodles) of semiconductor chilling plate 4, form cold flow thin layer in water, the water of cold flow thin layer and both sides carries out heat interchange simultaneously, forms the positive gradient temperature field that symmetrical direction is vertical with cold flow thin layer in cold flow thin layer both sides.The density of water more than 4 DEG C and temperature are inversely proportional to, and the density of water is larger, refractive index is larger, and namely water temperature is low, and refractive index is large, in the graded region that the refractive index of the formation symmetry of cold flow thin layer both sides is descending.Due to light in transmitting procedure always to the region deviation that refractive index is large, therefore longitudinally by the laser beam of cold flow thin layer, the deviation of different directions is produced in contrary positive gradient temperature field, direction in cold flow thin layer symmetria bilateralis, by the laser beam of dispersing, assemble to centre, the mechanism of this optically focused phenomenon is identical with the concentrating light principles of GRIN Lens, achieves the ocular demonstration of GRIN Lens concentrating light principles with this.
Claims (5)
1. a GRIN Lens concentrating light principles simulation demonstrating apparatus, it is characterized in that: in the upper transparent sink (2) arranged built with water of base (7), the right outside side of transparent sink (2) is coated with white skin of paint (5), transparent sink (2) rear portion base (7) is outward provided with semiconductor refrigerating plate rack (3), semiconductor refrigerating plate rack (3) is provided with water-immersed semiconductor chilling plate (4), distance bottom semiconductor chilling plate (4) lower surface screw clamp is at least 70mm, the leading flank of semiconductor chilling plate (4) is hot side or huyashi-chuuka (cold chinese-style noodles), and and horizontal plane, in the upper transparent sink (2) of base (7) left side outward, the laser stent (6) being provided with semiconductor laser (1) is set, the angle of divergence of semiconductor laser (1) outgoing is that the divergent laser beam of 15 ° ~ 20 ° passes through immediately below semiconductor chilling plate (4), circular light spot is formed in the upper projection of white skin of paint (5).
2. GRIN Lens concentrating light principles simulation demonstrating apparatus according to claim 1, it is characterized in that: described transparent sink (2) and the geometric configuration of semiconductor chilling plate (4) are rectangular parallelepiped, and the hot side of semiconductor chilling plate (4) is parallel with the length sidewall of transparent sink (2).
3. GRIN Lens concentrating light principles simulation demonstrating apparatus according to claim 1, is characterized in that: the angle of divergence of described semiconductor laser (1) emergent light is that the central plane of the divergent beams center line of 15 ° ~ 20 ° and semiconductor chilling plate (4) thickness is in same plane.
4. GRIN Lens concentrating light principles simulation demonstrating apparatus according to claim 1, is characterized in that: the angle of divergence of described semiconductor laser (1) emergent light is that the central plane of the divergent beams center line of 18 ° and semiconductor chilling plate (4) thickness is in same plane.
5. use an experimental technique for the GRIN Lens concentrating light principles simulation demonstrating apparatus described in claim 1, it is characterized in that being made up of following step:
1) the emergent light direction and the angle of divergence that adjust semiconductor laser (1) are 15 ° ~ 20 °, make the laser beam of semiconductor laser (1) outgoing by immediately below semiconductor chilling plate (4), be incident upon on white skin of paint (5), white skin of paint (5) is observed the homogeneity of at this moment circular light spot brightness;
2) connect semiconductor chilling plate (4) power supply, observe the situation of change of vertical light band and the vertical light band both sides brightness formed in the upper circular light spot of white skin of paint (5).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057039A (en) * | 2016-07-30 | 2016-10-26 | 陕西师范大学 | Liquid convection heat transfer process real-time observation device and experimental demonstration method |
| CN106290455A (en) * | 2016-07-30 | 2017-01-04 | 陕西师范大学 | The optical observation experimental provision of material conducts heat performance difference and experimental technique |
| CN109036051A (en) * | 2018-07-09 | 2018-12-18 | 陕西师范大学 | The apparatus for demonstrating and demenstration method that surrounding medium influences the poly- astigmatism characteristics of lens |
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| CN201812424U (en) * | 2010-11-23 | 2011-04-27 | 陈健波 | Optical demonstration instrument presenting spatial optical path |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057039A (en) * | 2016-07-30 | 2016-10-26 | 陕西师范大学 | Liquid convection heat transfer process real-time observation device and experimental demonstration method |
| CN106290455A (en) * | 2016-07-30 | 2017-01-04 | 陕西师范大学 | The optical observation experimental provision of material conducts heat performance difference and experimental technique |
| CN106290455B (en) * | 2016-07-30 | 2019-03-05 | 陕西师范大学 | The optical observation experimental provision and experimental method of thermal conductivity of material difference |
| CN106057039B (en) * | 2016-07-30 | 2019-03-05 | 陕西师范大学 | Liquid convection diabatic process optics real-time observation device and experimental demonstration method |
| CN109036051A (en) * | 2018-07-09 | 2018-12-18 | 陕西师范大学 | The apparatus for demonstrating and demenstration method that surrounding medium influences the poly- astigmatism characteristics of lens |
| CN109036051B (en) * | 2018-07-09 | 2020-10-30 | 陕西师范大学 | Demonstration device and demonstration method for influence of environment medium on lens astigmatism gathering characteristic |
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