In 1947, Dennis Gabor, a physicist of British-Hungarian origin, invented holography, for which he was awarded the Nobel Prize in Physics in 1971. Today, we're going to make a model that looks a lot like a holographic projection, more accurately called "stereoscopic projection", which can help us better understand holographic projection technology.
Experimental materials
Cardboard, transparent acrylic sheet, marker, ruler, scissors, paper cutter.
Experimental Procedure
1.Draw 4 sides with a marker on cardboard with a length of 13Large squares of 5 cm, cut with scissors for later use.
2.On 1 of the large squares, draw 4 trapezoids with a marker. The upper bottom of the trapezoid is 15 cm, the bottom is 95 cm, 4 cm high. Draw another small square, the side length of the small square is 15 cm. Reserve 4 holes in the 4 corners of the large square. Use a paper cutter to cut out the trapezoids and small squares.
3.Repeat step 2, but be careful that the small square in the middle is not cut out, but 2 holes are reserved on it.
4.On the 3rd large square, draw 1 square with a side length of 10 cm;On the 4th large square, draw 1 square with a side length of 11 cm. Use a paper cutter to cut the two squares separately. Note that the 4 corners of these two large squares still need to be holed.
5.Then draw 4 polygons and 2 small rectangles as shown in the image below.
6.This gives you 4 square frames. For the sake of explanation, we named them A, B, C, and D. Place A on B, as the top plate;Place C on D, as the base plate. Connect the top and bottom plates with polygons and place the small rectangles in the holes reserved for d. In this way, the framework of the 3D holographic projection model is built.
7.Transparent acrylic sheets are placed inside the frame to form an "inverted pyramid". Use your phone to search for 3D holography**, a piece that can be used for projection**. Place the finished model at the top of the phone screen. Dim the lights in the room, and you'll be able to enjoy a stereoscopic projection that looks like a holographic projection.
Experimental principleOn the screen of the mobile phone, there are 4 identical images, which are refracted by transparent acrylic plates in the position of the "inverted pyramid" and intertwined with each other. In our eyes, the image of the 4 planes is combined into a three-dimensional image. And it's vivid from any angle, it's stereoscopic projection.
If you want to make the effect more obvious and the stereoscopic projection effect more stunning, you can also try using a larger screen and a larger transparent acrylic sheet. For example, you can try using a computer screen or tablet as a projection source. However, it should be noted that the data of the upper bottom, lower bottom and height of the trapezoid need to be enlarged in equal proportions. Do you know why?
Knowledge is Power" magazine, the original title "It's so cool!".Self-made 3D projection model", written by Duan Yupei, with deletions, original work**Please indicate**.
Order now for 2024Knowledge is Power magazineOnly 360 RMBYou can take home a whole year's knowledge!