A device for observation and recognition of visual illusion of square size
A recognition device, optical illusion technology, applied in educational appliances, instruments, teaching models, etc., to achieve the effect of facilitating observation and recognition, and deepening understanding
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[0009] Such as figure 1 As shown, the present invention includes a light box 1 , a shading film 2 , a light-transmitting frame 3 , a light-transmitting hole 4 , and a verification board 5 . The light box 1 is rectangular, the light-shielding film 2 is pasted on the surface of the light box 1, the light-transmitting frame 3 and the light-transmitting hole 4 are opened on the light-shielding film 2, and the check board 5 is hung on the long side of the light box 1 by a lanyard 52. Both the light hole 4 and the calibration plate 5 are square, the light-transmitting frame 3 is a square frame, and the size of the square 31 surrounded by the light-transmitting frame is exactly the same as that of the light-transmitting hole 4 and the calibration plate 5 .
[0010] Turn on the light box power switch 11 located on the side of the light box 1, the light-transmitting frame 3 and the light-transmitting hole 4 are illuminated, which is conducive to clearly observing the optical illusion. ...
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