The principle of 3D holographic projection production method?

What is 3D holographic projection technology

3D holographic projection technology mainly uses the principles of interference and diffraction to reproduce the three-dimensional image of an object. It is the reverse display process of holographic photography technology. The first step is to use the principle of interference to record the light wave information of the object, which is the shooting process; the second step is to use the principle of diffraction to reproduce the light wave information of the object, which is the imaging process.

The production method of 3D holographic projection is as follows↓

1. Tools/Materials

Mobile phone, ruler, knife (or scissors), paper, pen? CD plastic Shell, a piece of draft paper, tape

Method/Steps

1. Very simple, use a pen to draw on the paper: use a ruler to measure the upper bottom 1cm, waist line 3.5 cm, a trapezoid with a lower base of 6cm.

2. Use a utility knife to cut out the drawn trapezoid

3. Carefully remove the corners of the CD plastic case

4. Cut out the Place the paper trapezoid on the CD plastic case and carefully cut out the trapezoid with a utility knife. ps: Please repeat this step to cut out 4 identical plastic trapezoids.

5. Don’t worry, the effect will come out immediately. Then use tape to stick the edges of the plastic trapezoid to make it a "pyramid" without a top.

Overview of the principles of 3D holographic projection technology

1. Interference principle: Before projection, the projected "shadow" needs to be recorded. This is the first step in holographic projection technology. That is, the principle of interference is used to record light wave information and complete the shooting process.

During the shooting process, part of the laser irradiates the object to form a diffuse object beam, and the other part of the laser serves as a reference beam and is emitted onto the holographic film and superimposes with the object beam to cause interference. Interference converts the phase and amplitude of each point on the object's light wave into spatially varying intensity, and uses the contrast and spacing between interference fringes to record all the information. The film recording the interference fringes is developed, fixed, etc. , it becomes a hologram, that is, a holographic photo.

2. Principle of diffraction: After completing the shooting process to form a hologram, the second step is to use the principle of diffraction to reproduce the light wave information of the object based on the hologram to complete the imaging process.

During the imaging process, the hologram is illuminated by coherent laser light to form two images: the original image and the yoke image. The reproduced image has strong three-dimensionality and visual effects. Since each part of the hologram records the light information of each point on the object, each part of the hologram can reproduce the entire image of the original object. After multiple exposures, multiple different images can be recorded on the same negative. , and can be displayed separately without interfering with each other.

Application of 3D holographic projection technology

3D holographic projection technology has a wide range of applications. It can produce images in the air and create interactive performances with performers. No matter what form it is, it can bring people for a stunning performance. Its applicable fields mainly include product exhibitions, press conferences, stage performances, entertainment venues, etc.