CN206097662U - Double -colored linearly polarized light brewster's law demonstrates appearance - Google Patents
Double -colored linearly polarized light brewster's law demonstrates appearance Download PDFInfo
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- CN206097662U CN206097662U CN201620691076.8U CN201620691076U CN206097662U CN 206097662 U CN206097662 U CN 206097662U CN 201620691076 U CN201620691076 U CN 201620691076U CN 206097662 U CN206097662 U CN 206097662U
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- turning arm
- semiconductor laser
- brewster
- swinging boom
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Abstract
The utility model provides a double -colored linearly polarized light brewster's law demonstrates appearance, surveys brewster's law's phenomenon, also measurable quantity transparent medium refracting index. Center pillar fixes in the square base top, the calibrated scale is fixed in the center pillar top, three swinging boom passes through the centre bore and links to each other with center pillar, semiconductor laser is fixed to one of them swinging boom, inclined to one side vibration -damping sheet and swinging boom positioning cursor, two other fixed receiving screen and swinging boom positioning cursor, semiconductor laser, inclined to one side vibration -damping sheet, receiving screen and swinging boom positioning cursor all fix on the vertical central line of swinging boom, two semiconductor laser are the longitudinal distribution, the clearing hole is inlayed on the swinging boom, the visible light source of different wavelength is selected for use to the laser instrument, two inclined to one side vibration -damping sheet pass through glue to be fixed at two bundles of semiconductor laser front ends, through two solid fixed splint of bolt installation on the calibrated scale, place transparent dielectric slab heap between two solid fixed splint. This brewster's law demonstration appearance simple operation, simple structure can supply students to observe simultaneously.
Description
Technical field
The utility model is related to a kind of double-colored linearly polarized light Brewster law demonstrator, belongs to a kind of wave optics demonstration
Instrument.
Background technology
Brewster's law is one of most important theories in College physics course with regard to wave optics.The law is pointed out when certainly
So light with brewster angle incidence to two media interface when, it is inclined perpendicular to the line of the plane of incidence that reflected light can become the plane of oscillation
Shake light, and refraction light is the plane of oscillation parallel to the stronger partial poolarized light of the light intensity of the plane of incidence.According to Brewster's law, can be with
Infer, when light with brewster angle incidence to sheet glass heap when, reflect light can also become linearly polarized light.
Theory and phenomenon described by the law is that student is daily cannot be observed, required to be allowed by certain demonstration instrument
Student observes phenomenon therein, helps student to understand physical theory.
At present the instrument of most of demonstration Brewster's law is primarily focused on and observes reflected light by rotatory polarization piece
Polarization state, the problem for existing is exactly to be not easy to allow students on classroom while observing phenomenon.
The content of the invention
For allowing students that the purpose of observation simultaneously is carried out to the phenomenon of Brewster's law on classroom, using natural light
Can be expressed as that two beams are equicohesive, the thought of the orthogonal linearly polarized light of direction of vibration, the utility model is strong with two beams etc.
The direction of vibration of degree replaces natural light to incide transparent medium parallel to the plane of incidence and perpendicular to the double-colored linearly polarized light of the plane of incidence
On piece (heap), by the change for observing two kinds of light light intensity on reflected light receiving screen, refraction light-receiving screen, demonstration Brewster is determined
The phenomenon of rule.
The technical solution of the utility model is realized in the following manner：
A kind of double-colored linearly polarized light Brewster law demonstrator, it is characterised in that：The Brewster demonstrator includes bottom
It is seat 1, dial 2, receiving screen 3, semiconductor laser 4, polarizer 5, transparent dielectric slab heap 6, turning arm 7, adjustment bolt 8, solid
Clamp plate 9, ambulatory splint 10, center stand column 11, turning arm positioning pointer 12；Center stand column 11 is fixed in square base 1
Side, dial 2 is fixed on the top of center stand column 11, and three turning arms 7 are connected by centre bore with center stand column 11, one of them
Turning arm 7 fixes semiconductor laser 4, polarizer 5 and turning arm positioning pointer 12, and respectively fixation connects two other turning arm 7
Screen 3 and turning arm positioning pointer 12 are received, semiconductor laser 4, polarizer 5, receiving screen 3 and turning arm positioning pointer 12 are fixed
On the vertical center line of turning arm 7, two semiconductor lasers 4 are genesis analysis, are fixed on turning arm 7, and two and half lead
Body laser 4 selects the visible light source of different wave length, two polarizers 5 to be fixed on before two beam semiconductor lasers 4 by glue
End, the polarization direction of one of polarizer 5 be vertical direction, another polarization direction of polarizer 5 be horizontal direction, scale
Two straps 9 are installed by bolt on disk 2, transparent dielectric slab heap 6 is placed between two straps, by adjustment bolt
8 promotion ambulatory splints 10 are fixed to transparent dielectric slab heap 6.
Two semiconductor lasers 4 incide transparent dielectric slab from the visible light source of different wave length after polarizer 5
The plane of polarization of the linearly polarized light of heap 6 is respectively parallel to and perpendicular to the plane of incidence.The normal direction of transparent dielectric slab heap 6 is along dial
2 90 ° of angular direction, the incidence angle of the light of semiconductor laser 4 to transparent dielectric slab heap 6, angle of reflection and refraction angle are by turning arm
Positioning pointer 12 indicates on dial 2, and when can directly verify that observation meets Brewster's law reflected light perpendicular to refraction
Light.
The demonstration instrument has the effect that：
1) when the light of semiconductor laser is equal to Brewster's angle to the incidence angle of transparent dielectric slab heap, reflected light only has
A kind of color, refraction light has two kinds of colors, and with the increase of dieelctric sheet quantity in transparent dielectric slab heap, refraction light is also only a kind of
Color, and it is different from reflection light color, and when incidence angle is not equal to Brewster's angle, reflected light and refraction light have two kinds of face
Color；2) by the quantity of dieelctric sheet in change dieelctric sheet heap, realized reflecting the effect that light becomes linearly polarized light with dieelctric sheet heap；
3) when can observe incident light with brewster angle incidence, reflected light and refraction light are at an angle of 90；4) can be used for measuring different Jie
The refractive index of matter piece.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is fixed transparent medium schematic device of the present utility model.
Fig. 3 is semiconductor laser schematic diagram of the present utility model.
Fig. 4 is polarizer constructions schematic diagram of the present utility model.
Fig. 5 is dial position view of the present utility model.
Fig. 6 is the turning arm schematic diagram of installation semiconductor laser of the present utility model.
Fig. 7 is the turning arm schematic diagram of installation receiving screen of the present utility model.
Specific embodiment
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the device is a kind of Brewster law demonstrator, should
Device simple operation, simple structure, effect is obvious.A kind of double-colored linearly polarized light Brewster law demonstrator, it is characterised in that：
The Brewster demonstrator includes base 1, dial 2, receiving screen 3, semiconductor laser 4, polarizer 5, transparent dielectric slab heap
6th, turning arm 7, adjustment bolt 8, strap 9, ambulatory splint 10, center stand column 11, turning arm positioning pointer 12.
Center stand column 11 is fixed on the top of square base 1, and dial 2 is fixed on the top of center stand column 11, three rotations
Arm 7 is connected by centre bore with center stand column 11, and one of turning arm 7 fixes semiconductor laser 4, polarizer 5 and rotation
Arm positioning pointer 12, two other fixed reception screen 3 of turning arm 7 and turning arm positioning pointer 12, semiconductor laser 4, polarization
Piece 5, receiving screen 3 and turning arm positioning pointer 12 are each attached on the vertical center line of turning arm 7, two semiconductor lasers 4
For genesis analysis, be embedded on turning arm 7 by hole, two semiconductor lasers 4 from different wave length visible light source, two
Polarizer 5 is fixed on the front end of two beam semiconductor laser 4 by glue, and the polarization direction of one of polarizer 5 is vertically side
To, another polarization direction of polarizer 5 is horizontal direction, by bolt two straps 9 of installation on dial 2, two
Transparent dielectric slab heap 6 is placed between strap, the piece number for constituting the transparent dielectric slab of transparent dielectric slab heap 6 passes through adjustment bolt
8 promotion ambulatory splints 10 are adjusted and transparent dielectric slab heap 6 are fixed.
Two semiconductor lasers 4 incide transparent dielectric slab from the visible light source of different wave length after polarizer 5
The plane of polarization of the linearly polarized light of heap 6 is respectively parallel to and perpendicular to the plane of incidence.The normal direction of transparent dielectric slab heap 6 is along dial
2 an angle of 90 degrees direction, the incidence angle of the light of semiconductor laser 4 to transparent dielectric slab heap 6, angle of reflection and refraction angle are by turning arm
Positioning pointer 12 indicates on dial 2, and when can directly verify that observation meets Brewster's law reflected light perpendicular to refraction
Light.
Claims (1)
1. a kind of double-colored linearly polarized light Brewster law demonstrator, it is characterised in that：The Brewster demonstrator includes base
(1), dial (2), receiving screen (3), semiconductor laser (4), polarizer (5), transparent dielectric slab heap (6), turning arm (7),
Adjustment bolt (8), strap (9), ambulatory splint (10), center stand column (11), turning arm positioning pointer (12)；Center stand column
(11) square base (1) top is fixed on, dial (2) is fixed on center stand column (11) top, and three turning arms (7) pass through
Centre bore is connected with center stand column (11), the fixed semiconductor laser (4) of one of turning arm (7), polarizer (5) and rotation
Arm positioning pointer (12), two other turning arm (7) difference fixed reception screen (3) and turning arm positioning pointer (12), semiconductor
Laser instrument (4), polarizer (5), receiving screen (3) and turning arm positioning pointer (12) are each attached to the vertical center of turning arm (7)
On line, two semiconductor lasers (4) are genesis analysis, are fixed on turning arm (7), and two semiconductor lasers (4) are selected
The visible light source of different wave length, two polarizers (5) are fixed on two beam semiconductor laser (4) front ends by glue, wherein one
Individual polarizer (5) polarization direction be vertical direction, another polarizer (5) polarization direction be horizontal direction, dial (2)
It is upper that two straps (9) are installed by bolt, transparent dielectric slab heap (6) is placed between two straps, by adjusting spiral shell
Bolt (8) promotes ambulatory splint (10) to be fixed transparent dielectric slab heap (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620691076.8U CN206097662U (en) | 2016-07-02 | 2016-07-02 | Double -colored linearly polarized light brewster's law demonstrates appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620691076.8U CN206097662U (en) | 2016-07-02 | 2016-07-02 | Double -colored linearly polarized light brewster's law demonstrates appearance |
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| CN206097662U true CN206097662U (en) | 2017-04-12 |
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| CN201620691076.8U Active CN206097662U (en) | 2016-07-02 | 2016-07-02 | Double -colored linearly polarized light brewster's law demonstrates appearance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105957430A (en) * | 2016-07-02 | 2016-09-21 | 北京工业大学 | Bicolor linearly-polarized light Brewster's law demonstration instrument |
-
2016
- 2016-07-02 CN CN201620691076.8U patent/CN206097662U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105957430A (en) * | 2016-07-02 | 2016-09-21 | 北京工业大学 | Bicolor linearly-polarized light Brewster's law demonstration instrument |
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