CN2700993Y - Inclination adjustable double flat mirrors imaging demonstration instrument - Google Patents

Abstract

The utility model discloses an inclination adjustable double flat mirror imaging demonstration instrument, comprising square flat mirrors, a base and a flat mirror connecter. The base is a flat plate on which one flat mirror is vertically fixed; one edge of the other movable flat mirror is movably connected with one vertical edge of the fixed flat mirror into a rotary shaft; the movable flat mirror can rotate 180 degrees along the shaft; the upper face of the base is provided with a rotating angle indicating scale corresponding to the rotating track of the movable flat mirror of which one end of the bottom edge away from the rotary shaft is provided with an auto-locking stopping component; and the base is provided with a groove corresponding to the auto-locking stopping component. When used, the demonstration instrument can conveniently and visually demonstrate the imaging cases of the two flat mirrors after reflecting twice or reflecting a plurality of times when the two flat mirrors have different inclued angles, and the demonstration instrument can demonstrate the original direction reflecting phenomenon of the light ray by means of another square flat mirror when three flat mirrors are perpendicular to each other.

Description

Adjustable included angle formula two mirror imaging demonstrators

Technical field

The utility model relates to a kind of instruments used for education, more specifically is physics teaching mirror imaging apparatus for demonstrating.

Technical background

At present, imaging problem of the number when often running into two level crossings in the physics teaching in secondary school and becoming 90 degree angles or other angles, owing to relate to the secondary reflection of light or repeatedly reflection, graphing method is very complicated, not directly perceived yet, the student is difficult for understanding, and uses two or three level crossing demonstrations inconvenient simply, brings certain difficulty to teaching.

The utility model content

The utility model purpose is the problem that overcomes existing physics teaching midplane mirror image-forming demonstration difficulty, provides a kind of simple to operate, visual result, adjustable included angle formula two mirror imaging apparatus for demonstrating.

The utility model is realized in the following way: adjustable included angle formula two mirror imaging demonstrators, comprise square planar mirror, base, level crossing web member, base is a flat board, a fixed pan mirror is vertically fixed on this flat board, one side of another free cheek mirror flexibly connects into turning axle with a stile of the level crossing of fixing, the free cheek mirror has on base and the corresponding anglec of rotation indicating graduation of free cheek mirror rotational trajectory along these rotatable 180 degree; Fixing wooden frame is arranged on four limits of level crossing, and the end on the base of free cheek mirror away from rotating shaft is provided with the self-locking stop component, has on base and the corresponding groove of self-locking stop component.

The self-locking stop component is set is when making the free cheek mirror rotate to certain scale can relative fixed, so that demonstration.Can be designed to: on the end inferior horn of the base of free cheek mirror wooden frame, a circular hole is arranged, embed retaining spring and steel ball in the circular hole, having on the base and the corresponding groove that is distributed on the special calibration points of spring steel ball away from rotating shaft.

The beneficial effects of the utility model are: though structure is simple, can makes things convenient for, carry out following demonstration intuitively: two level crossings are through secondary reflection or catoptric imaging situation repeatedly when 1. demonstrating different angle; 2. again by a square planar mirror, can demonstrate the former direction reflex of three level crossings light when vertical each other.

Description of drawings

Fig. 1 is the spatial structure sketch of the utility model embodiment.

Fig. 2 is the web member sketch of the utility model embodiment.

Fig. 3 is free cheek mirror chocking construction parts enlarged drawings.

Fig. 4 is auxiliary square planar mirror.

Among the figure, 1. base, 2. scale, 3,4. frame, 5. free cheek mirror, 6. fixed pan mirror, 7. web member, 8. circular hole, 9. steel ball, 10. nail hole, 11. axis holes, 12. rotating shafts, 13. springs, 14. auxiliary square planar mirrors.

Embodiment: square planar mirror (5,6) go up wooden frame or batten (3 with the multi-purpose adhesive bonding, 4), each one up and down of web member (7), square planar mirror (5,6) link together by the rotating shaft (12) in web member (7) and the commentaries on classics hole (11), fixed pan mirror (6) is vertically fixed on the base (1), free cheek mirror (5) can rotate freely from the 0-180 degree along rotating shaft (12), on base (1), scribe 0--180 degree indicating graduation (2), at the base frame of free cheek mirror (5) away from an end of the rotating shaft circular hole (8) that to make a call to a diameter be 0.5cm, be pressed into a suitable spring (13), steel ball (9), and the special calibration points on base (1) is (as 30 degree, 45 degree, 60 degree, 120 degree, 180 degree) make groove, so that free cheek mirror (5) can self-locking when turning to some special angle, relative fixed.

Concrete demonstration is described: two mirror imaging situations when 1. demonstrating different angle: put a wisp (as checker) in the angle of two level crossings, the angle that changes two level crossings divides unique 30 degree, 45 degree, 60 degree, 120 degree, 180 degree etc., at this moment the imaging number that can be observed in two level crossings is respectively 11,7,5,2,1, thereby bootable student summarizes formula n=360 ° of ÷ a-1, wherein n is the imaging number, a is two level crossing angles, also know by observing, when angle was not integer, the number of imaging was got carry value; 2. demonstrate the former direction reflection of light: earlier the level crossing angle is adjusted to 90 degree, on base, place a square planar mirror more then near above-mentioned two level crossings, make three facial plane mirrors vertical in twos, shine any one of three level crossings from different perspectives with the miniature laser transmitter, laser reflects back along former direction through triple reflection, if add the smog environment, can see the concrete reflection case of light more clearly, effect can be better.

Claims (3)

1. adjustable included angle formula two mirror imaging demonstrators, comprise square planar mirror (5,6), base (1), level crossing web member (7), it is characterized in that at described base (1) be a flat board, a fixed pan mirror (6) is vertically fixed on this flat board, one side of another free cheek mirror (5) flexibly connects into turning axle with a stile of the level crossing of fixing (6), free cheek mirror (5) has on base (1) and free cheek mirror (5) the corresponding anglec of rotation indicating graduation of rotational trajectory (2) along these rotatable 180 degree.

2. adjustable included angle formula two mirror imaging demonstrators according to claim 1 is characterized in that fixing wooden frame is arranged on four limits of level crossing; The base of free cheek mirror is provided with the self-locking stop component away from an end of rotating shaft, has on base (1) and the corresponding groove of self-locking stop component.

3. adjustable included angle formula two mirror imaging demonstrators according to claim 2, it is characterized in that described self-locking stop component structure is: on the end inferior horn of the wooden frame in the base of free cheek mirror (5), a circular hole (8) is arranged away from rotating shaft, embed retaining spring (13) and steel ball (9) in the circular hole (8), on wooden base (1), have and the corresponding groove that is distributed on the special calibration points of steel ball (9).

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