CN103646598A

CN103646598A - Light reflection law experiment probe instrument

Info

Publication number: CN103646598A
Application number: CN201310685503.2A
Authority: CN
Inventors: 王长录; 王以玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-14
Filing date: 2013-12-14
Publication date: 2014-03-19
Anticipated expiration: 2033-12-14
Also published as: CN103646598B

Abstract

The invention relates to a light reflection law experiment probe instrument. The light reflection law experiment probe instrument is characterized in that the center of a base plate 8 is symmetrically provided with a normal rod fixed plate 5; the middle of the normal rod fixed plate 5 is provided with a normal rod 4 which is fixed by a nut; a support I1 and a support II11 fixed by butterfly nuts 7 are respectively symmetrically installed at positions with a 90-degree center included angle at the two sides of the base plate 8; the upper portion of the support I1 is provided with a support bar 13 through a chuck 2; the other end of the support bar 13 is provided with a laser pen 3; the upper portion of the support II11 is provided with an optical screen rod 23 through a chunk 2; and a reflective mirror 10 is arranged at the circle center of the base plate 8. By using the light reflection law experiment probe instrument, incident light, a normal line and reflection light are fixed in an object form, and 360-degree rotation is realized so that all students around can understand the idea that the three lines are at the same plane. A matching index dial 17 is utilized so that the relation between an incident angle and a reflection angle can be successfully verified, and the probing of a light reflection law is more visual and simpler.

Description

A kind of reflection of light law Experimental Research instrument

Technical field

The present invention relates to a kind of Experiments of Optics instruments used for education, more specifically to a kind of reflection of light law Experimental Research instrument.

Background technology

Reflection of light law is proposed by the French civil engineering work physicist's Fresnel (1788～1827) of holding concurrently.He has found the relation between reflection/refraction and viewpoint angles.Therefore, reflection of light is called again Fresnel reflection.Saying of summarizing is exactly: reflection ray and incident ray, normal are at grade; Reflection ray and incident ray separation are in the both sides of normal; Incident angle equals reflection angle.Can be summarized as: " three lines are coplanar, two line separations, two jiaos equate ".We are very familiar for this law, but for the junior middle school student who just contacts the character of light, and their concept of space is not also set up completely, and they have certain difficulty in study, while understanding reflection of light law.The experimental facilities in existing laboratory can not make student understand reflection law very intuitively, and this also makes a lot of teacher of physics worried because allowing student well understand reflection of light law.

Summary of the invention

The object of the invention is: a kind of reflection of light law Experimental Research instrument is provided, can makes student understand intuitively the relation between reflection ray, normal and incident ray in reflection of light law.

The present invention includes base plate, support I, support II, normal bar fixed head, normal bar, the support bar of normal bar, chuck, laser pen, optical screen, reflective mirror, its feature is:

A, the support bar of normal bar is housed at the Central Symmetry of base plate, the other end of the support bar of symmetrical normal bar is equipped with normal bar fixed head, in the middle of normal bar fixed head, normal bar is housed and fixes by nut.

B, center, base plate both sides angle are 90 ° to be located symmetry respectively support I, support II is housed, and by wing nut, is fixed; Support bar is equipped with by chuck in support I top, and the other end of support bar is equipped with laser pen; Optical screen bar is equipped with by chuck in support II top.

C, the uniform bearing in base plate bottom.

D, reflective mirror are put on the center of circle of base plate.

The present invention compares with the existing instrument of laboratory of middle school, its advantage is: the present invention can be fixed up reflection ray, normal and incident ray with form in kind, and can 360 ° of rotations, make all classmates of surrounding can realize the intension of three lines in same plane.Coordinate supporting index plate, also can verify smoothly the relation of incident angle and reflection angle, make us probe into reflection of light law more directly perceived, simple.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.

Fig. 1 is the structural representation of a kind of reflection of light law of the present invention Experimental Research instrument;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the structural representation replacing after light by light path bar I 15 and light path bar II 16 in Fig. 1;

Fig. 4 is index plate 17 enlarged diagrams in Fig. 3;

Fig. 5 is the structure enlarged diagram of support bar 13 in Fig. 2;

Fig. 6 is the side view of Fig. 5;

Fig. 7 is the structural representation that in Fig. 2, optical screen bar 23 is threaded after optical screen 12;

Fig. 8 is the structure enlarged drawing of light path bar I 15 in Fig. 3;

Fig. 9 is the structure enlarged drawing of Fig. 1 medium-height trestle I 1;

Embodiment

In Fig. 1,2,5,6,7,9: base plate 8 360 ° of rotations in the plane, its uniform bearing 9 in bottom, the support bar 6 of normal bar is housed at the Central Symmetry of base plate 8, by nut, be fixed on base plate 8, support bar 6 other ends of symmetrical normal bar are equipped with normal bar fixed head 5, in the middle of normal bar fixed head 5, normal bar 4 is housed, by nut, fixes.Base plate 8 center, both sides angles are 90 ° to be located symmetry respectively support I 1, support II 11 is housed, and support I 1 is identical with support II 11.Support I 1 is welded by cradling piece 24 and carrier base 25, and carrier base 25 upper ends are provided with threaded hole 21, is provided with draw-in groove 22 in the middle of side.Draw-in groove 22 is stuck on base plate 8, by threaded hole 21, by wing nut 7, is fixed.Reflective mirror 10 is put on the center of circle of base plate 8.Support bar 13 is equipped with by chuck 2 in support I 1 top, and support bar 13 one end are polished rod, and its other end is provided with fixed orifice 18, and laser pen 3 inserts fixed orifice 18.Optical screen bar 23 is equipped with by chuck 2 in support II 11 tops, and optical screen bar 23 one end are polished rod, its other end optical screen 12 that is threaded, and optical screen 12 is provided with light hole 19.Effect is: by regulating the chuck 2 in support I 1, adjust position and the direction of laser pen 3, make the incident ray of laser pen 3 be radiated at base plate 8 centers, by regulating the chuck 2 in support II 11, adjust position and the direction of optical screen 12, the light of reflective mirror 10 reflections is irradiated on the light hole 19 on optical screen 12.

In Fig. 3,4,8: take out laser pen 3 and reflective mirror 10, rubber stopper 14(rubber stopper 14 is identical with the diameter of laser pen 3) be placed in fixed orifice 18, light path bar I 15 is inserted rubber stopper 14 center and is replaced incident ray, the light hole 19 that light path bar II 16 is inserted on optical screen 12, replace reflection ray, the direction of propagation of arrow 20 pilot lights, light path bar I 15, light path bar II 16 are made by iron wire, are equipped with arrow 20 on iron wire.Effect is: when rotary bottom plate 8, all classmates of surrounding can observe the position relationship of incident ray, normal and reflection ray.Be close to light path bar I 15, normal bar 4, light path bar II 16 placement index plates 17, in the middle of index plate 17, be provided with convex slot, its effect is: make index plate 17 can be close to light path bar I 15, normal bar 4, light path bar II 16.0 scale mark, in centre, is measured corresponding incident angle and reflection angle, can be verified smoothly the relation of incident angle and reflection angle for symmetrical each 90 °.

In sum: the present invention can change position and the incident direction of laser pen 3, repeat above-mentioned steps, just can many experiments, probe into the reflection law of bright dipping.The present invention also can be fixed up reflection ray, normal and incident ray with form in kind, and can 360 ° of rotations, makes all classmates of surrounding can realize the intension of three lines in same plane.Use supporting index plate 17, also can verify smoothly the relation of incident angle and reflection angle, make us probe into reflection of light law more directly perceived, simple.

Claims

1. a reflection of light law Experimental Research instrument, the support bar (6), chuck (2), laser pen (3), optical screen (12), the reflective mirror (10) that comprise base plate (8), support I (1), support II (11), normal bar fixed head (5), normal bar (4), normal bar, is characterized in that:

A, the support bar (6) of normal bar is housed at the Central Symmetry of base plate (8), the other end of the support bar of symmetrical normal bar (6) is equipped with normal bar fixed head (5), in the middle of normal bar fixed head (5), normal bar (4) is housed and fixes by nut;

B, base plate (8) center, both sides angle are 90 ° to be located symmetry respectively support I (1), support II (11) is housed, fixing by wing nut (7); Support bar (13) is equipped with by chuck (2) in support I (1) top, and the other end of support bar (13) is equipped with laser pen (3); Optical screen bar (23) is equipped with by chuck (2) in support II (11) top;

The uniform bearing in bottom (9) of c, base plate (8);

D, reflective mirror (10) are put on the center of circle of base plate (8).

2. a kind of reflection of light law Experimental Research instrument according to claim 1, it is characterized in that: support I (1) is welded by cradling piece (24) and carrier base (25), carrier base (25) upper end is provided with threaded hole (21), is provided with draw-in groove (22) in the middle of side.

3. a kind of reflection of light law Experimental Research instrument according to claim 1, is characterized in that: support bar (13) one end is polished rod, and its other end is provided with fixed orifice (18).

4. a kind of reflection of light law Experimental Research instrument according to claim 1, is characterized in that: optical screen bar (23) one end is polished rod, its other end optical screen (12) that is threaded, and optical screen (12) is provided with light hole (19).