Holographic projection technology and its realization

(Compilation: Raul) We've all been looking forward to using smartphones to project holograms, but it's clear that smartphones have the potential to do so, but you don't know yet.

If you're curious, we'll tell you that in addition to smartphones, you need some basic tools and CD boxes to make your smartphone work with holographic projection. Now Mrwhosetheboss This tutorial on the web, it looks really cool.

Preparatory work

CD box;

coordinate grid paper;

Cellophane tape or strong glue;

Pen

Scissors

a smart phone;

Color glass knife or knife;

Step One:

First, use a pen on the grid to mark the size of the bottom 1 cm, bottom 6 cm, height 3.5 cm of the isosceles trapezoid, if you want, you can scale up twice times or three times times. But be aware that, do not be too big, as long as can be used as long as the size of the mobile phone camera is good.  

Cut this isosceles trapezoid down to spare.

Step Two:  

Take out the CD case you prepared before and remove the edges. From the material selection, as long as it is the glass material can be, the more transparent effect the better. For convenience, however, the most easily accessible CD case is chosen.

Step Three:  

using the isosceles trapezoidal for reference, cut out the same size trapezoid with glass knife, one needs four pieces.  

Step Four:  

The four trapezoidal small transparent panels are stitched together into a small pyramid with tape paper, but bonded to one another. In addition, we can also use strong glue to replace tape paper, but with strong glue to make glass plate adhesion more difficult, so it is more convenient to use cellophane tape.

Step Five:  

Turn off the lights, invert the transparent pyramid on the screen, and then test it with a few video demos that are specifically provided by Mrwhosetheboss. Interested friends can take a look at this video, and then hurry up and try it yourself.

Here we explore the holographic projection technology and its principle

Holographic technology is a technique that uses the principle of interference and diffraction to record and reproduce the real three-dimensional image of an object.

What is a holographic projection?

Holographic projection is the use of interference and diffraction principle to record and reproduce the real three-dimensional image of the object, simply, without wearing 3D glasses, can produce a three-dimensional effect of a technology. And we often see the 3D animated film is polarized glasses method, commonly known as "pseudo-3D holographic projection."

3D Holographic Projection Technology principle  

3D Holographic Stereoscopic projection device is not the use of digital technology, but the projection device will be different angle projection to the imported MP holographic projection film, so that you do not see the other images that do not belong to your own angle, thus realizing the true 3D holographic stereoscopic image.

The first step: using the interference principle to record the object light wave information, this is the shooting process. The subject is irradiated by a laser to form a diffuse beam of material, and the other part of the laser as a reference beam to the holographic film, and the object beam superimposed interference, the light wave on the objects of the phase and amplitude to change the intensity of the space, thus using the contrast between the interference fringes and the gap between the light wave of the whole information recorded. The film which records the interference fringes becomes a hologram, or holographic photograph, after the process of developing and fixing etc.

The second step: using the diffraction principle to reproduce the object light wave information, which is the imaging process. Hologram is like a complex grating, under the irradiation of coherent laser, the diffraction light of a sinusoidal hologram with a linear record can generally give two images, namely the original image and the conjugate image. The reconstructed image has a strong sense of three-dimensional and real visual effect. Each part of the hologram records the light information of each point on the object, so in principle each part of it can reproduce the whole image of the original, and can record many different images on the same film through multiple exposures, and it can be displayed separately without interfering with each other.

3D Holographic Projection Derivative products

holographic Phantom Imaging System: Holographic Phantom imaging is divided into 180-degree imaging and 360-degree imaging two, 180-degree suitable for single-sided display, generally used in 3D imaging area of the larger stage holographic projection and imaging area of the use of increased, and can achieve interactive 360-degree phantom imaging is a three-dimensional picture suspended in the sky imaging, creating a magic also true atmosphere, the effect is peculiar, with a strong sense of depth, true and false difficult to distinguish. The formation of aerial illusion in the middle can be combined with physical, to achieve the combination of image and physical. It can also be combined with a touch screen to achieve interaction with the audience. The 360 degree is suitable for displaying a single piece of valuable items, the audience can be viewed from any angle. It really renders a 3D image. And according to the user's line of sight needs a code horizon can create a 360-degree holographic phantom imaging stage for customers.  

Holographic Interactive Display system: Holographic interactive Display system is the nano-sensing touch film and scattering back-projection technology crystallization, is a novel, extraordinary display way, visitors can through the holographic display of glass interaction, to visitors a mysterious and magical fantasy feeling, Provides a modern, stylish means of interaction for display queries. Under the specific software production method, the holographic interactive display system can also provide a special image effect floating on the glass, giving the customer a strong visual shock. At the same time, this technology can be used to use finger or other natural objects on the projection screen touch selection, open Interface, conversion screen, information query, drag and other control functions.

Technical principle

The first step is to use the principle of interference to record the object Light wave information, which is the filming process: the subject under laser irradiation to form a diffuse object beam, the other part of the laser as a reference beam to the holographic film, and the object beam superposition to create interference, the light wave on the objects of the phase and amplitude of the changes in the spatial intensity, Thus, the whole information of the light wave is recorded by contrast and interval between the interference fringes. The film that records the interference fringes becomes a hologram, or hologram, after the process of developing, fixing, and so on. The second step is to reproduce the object's light wave information using the diffraction principle, which is the imaging process: the hologram is like a complex grating, under the coherent laser irradiation, The diffraction waves of a sinusoidal hologram with a linear record can generally give two images, namely the original image (also known as the initial image) and the conjugate image. The reconstructed image has a strong sense of three-dimensional and real visual effect. Each part of the hologram records the light information of each point on the object, so in principle each part of it can reproduce the whole image of the original, and can record many different images on the same film through multiple exposures, and it can be displayed separately without interfering with each other.

The holographic principle is that a system, in principle, can be fully described by some degrees of freedom on its boundaries, is a new basic principle based on the quantum nature of black holes. In fact, this basic principle is a quantum theory that links quantum elements with quantum bits. Its mathematical proof is that space-time has how many dimensions, there are quantum elements, how many quanta, there is how many qubits. Together, they form a finite set of space-time spaces that resemble matrices, that is, their permutation sets. Holographic insufficiency, is said to choose the number of permutations, choose the empty set and the whole arrangement, there is duality. That is, the holographic nature of space-time of a certain dimension is exactly equivalent to the number holographic of a few qubits; this is similar to the "Quantum error-Avoidance coding principle", which solves the problem of system computational error caused by coding errors in quantum computation. and space-time quantum computation, similar to the double-helix structure of biological DNA double conjugate coding, it is a real and virtual, positive and negative double conjugate coding together a quantum computer. This is called "biological space-time Science", which "entropy", also similar to "macroscopic entropy", not only refers to the degree of chaos, also refers to a range. From the "Origin of life", should mean. Therefore, all positions and times are range. The position "entropy" is the area "entropy", and the Time "entropy" is the thermodynamic Arrow "entropy". Second, a two-tuple arrangement similar to n-number qubits and N-number qubits, and a two-dollar arrangement similar to the determinant or matrix of n-Number lines and N-series, one of which is not the same as that of a determinant or matrix with a quantum bit less than the two-dollar array of N-number qubits and N-number qubits. The two-tuple permutation of N-number qubits and N-number qubits is an integrable system, and any dynamics of it can be described with a low quantum bit like the determinant of N-number rows and N-series, or the Matrix field theory. Mathematically, perhaps, can be proved or explored.

1, anti-de Sitter space, that is, point, line, the space within the plane, is integrable. Because point, line, polygon space and point, line, outer Space junction tends to "super 0" or "0 point can" zero, to here is an integrable system, its any dynamics can have a low one-dimensional field theory to achieve. In other words, because of the symmetry of the inverse de Sitter space, the symmetry of the space field theory in point, line and plane is greater than the Lorentz symmetry of the original point, line and outer space, this larger symmetry group is called the conformal symmetry group. Of course, this can be done by changing the geometry inside the inverse de Sitter space to eliminate this symmetry, so that the equivalent field theory does not have conformal symmetry, which can be called the new conformal conformal. If Madesina space is considered as "out-of-space", the general "out-of-space" or "point-in-space" can also be regarded as sphere-like space. Anti-de Sitter space, i.e. "point space", is a special limit in field theory. The classical gravitational and quantum fluctuation effect of "point space", the calculation of string theory is very complicated, the calculation can only be made under one limit. For example, the velocity of the cosmic mass orbital circle above the anti-de Sitter space is 8.88 times times the speed of light, which is made at a limit. At such limits, the "point space" transitions to a new space-time, or a pp-wave background. The spectra of multiple states of the cosmic chord can be accurately computed and reflected in the dual field theory, we can obtain the abnormal scale index of some operators in the mass spectrum calculation of the matter family.

2. This technique is that the chord is not made up of a finite sphere of quantum micro-elements. To get the usual meaning of the string, we must take the limit of the quantum string theory, at this limit, the length does not tend to zero, each string by the wire-coupled loop quantum can be divided into the micro-unit 10-33 square centimeters, and the number of micro-units is not tending to infinity, so that the string itself corresponds to the physical amount of energy In the operator construction of the presence theory, if we want to get the chord state in the background of the PP wave, we need to take this limit exactly. In this way, the micro-unit model is a universal construct, also clear. Under the special background of PP wave, the corresponding field theory description is also an integrable system.

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Original: Five simple steps to experience holographic projection technology with your smartphone

Holographic projection technology and its realization