How to Make a Homemade Holographic Display

Would you like to learn how to create your own? homemade holographic display? On this occasion we will show you the methods and materials so that you can have your own projection screen at home. We invite you to stay with us.

Raw materials to create a homemade holographic screen

Holograms made by humans are usually exposed on very high-resolution photographic film coated with a silver halide emulsion. Holograms made for mass production are exposed on a glass plate pretreated with iron oxide and then coated with photoresist.

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The photoresist will react chemically to the specific wavelength of light that will be used to create the hologram. Because of their availability at a relatively low cost, helium-neon lasers are most commonly used by people making their own holograms. Commercial hologram makers use different types of lasers, such as ruby, helium-cadmium, or krypton-argon ion.

After exposure, the film or photoresist plate It is processed in chemical developers like those used in photography. Both nickel and silver are used to make the production masters that will be used to stamp multiple copies of the holograms onto polyester or polypropylene film. Aluminum is used to create the reflective coating on the back of the embossed holograms.

Homemade holographic display design

A three-dimensional physical object can be used to create a hologram. The holographic image is usually the same size as the original.

This may require building a detailed scale model of the actual subject in a size suitable for the holographic image. Alternatively, the artwork to be reproduced as a hologram may be computer-generated, in which case the software controls the laser exposure of the image file, one pixel at a time.

Pixels are the individual dots that make up a graphic image on a computer screen or printed copy.

The manufacturing process of the homemade holographic display

There are several manuals available that explain to amateur holographers how to make holograms at home. The following steps describe the commercial mass production of a holographic image of a real three-dimensional object.

Mastering the homemade holographic display

1. A laser is used to illuminate the physical object, and the reflected light falls on the photoresist plate. Simultaneously, a reference beam from the laser also falls directly on the photoresist plate.
2. The interference patterns of these two light beams react with the photosensitive coating to record a holographic image of the object.
3. Common exposure times are between one and 60 seconds. In photography, slight movement of the object or film results in a blurred image.
4. In holography, however, the exposed plate will be blank (contain no image) if during the exposure there is as little motion as a quarter of the wavelength of laser light (visible light wavelengths range from 400 to 700 billionths of a meter).

A typical photoresist plate has a 6-inch (15,24 cm) square working area; an extra half-inch (1,25 cm) space on two edges allows the plate to be held in position. Because many holograms are smaller than this, they can be "group» (to group) several different images on a plate, just as numerous individual photographs are exposed on a roll of film.

5. The plate on which the original hologram is recorded is called the master. After being exposed, the master is processed in a chemical bath using standard photographic developers.
6. Before further production, the master is inspected to confirm that the image has been recorded correctly. Because of the chemical reactions caused by the laser and the developer on the photoresist, the surface of the developed plate resembles the surface of a phonograph record; there are about 15.000 grooves per inch (600 per cm), reaching a depth of about 0,3 microns (1 micron is one thousandth of a millimeter).

Electro formed homemade holographic display

1. Step 1:: The master is mounted on a template (frame) and sprayed with silver paint to achieve good electrical conductivity.
2. Step 2:: The template is lowered into a tank along with a supply of nickel.
3. Step 3:: An electric current is introduced and the master is electroplated with nickel. The template is removed from the tank and washed with deionized water.

4. Step 4:: The thin nickel coating, called the metal master shim, is removed from the master plate.

NOTE: : Contains a negative image of the master hologram (the negative is actually a mirror image of the original hologram). Using similar processes, several generations of shims are created.

Those made with the metal master wedge are known as "grandmothers» and contain positive images of the original hologram. At this stage, it is «combined» numerous copies of the original image (duplicated in rows) on a shim that can be used to print multiple copies with a single impression. Successive generations of shims are known as "mothers", "daughters" and "printing tights".

Because these generations alternate between negative and positive images of the original, the stamper's wedges are negative images that will be used during actual production runs to print the final product holograms.

Homemade Holographic Display Enhancement

Stamper foils are mounted on stamping machines. A roll of polyester film (or similar material) that has been smoothed with an acrylic coating is passed through the machine. Under intense heat and pressure, the wedge presses the holographic image onto the film, to a depth of 25 millionths of a millimetre. The embossed film is then rewound onto a roll.

Metalizing homemade holographic screen

1. The embossed film roll is loaded into a chamber from which air is removed to create a vacuum.
2. The chamber also contains aluminum wire, which vaporizes when heated to 2000°F (1093°C).
3. The sheet is exposed to vaporized aluminum as it is rewound onto another roll and, in the process, becomes coated with aluminum.
4. After being removed from the vacuum chamber, the film is treated to restore the moisture lost under the hot vacuum condition.
5. A top coat of lacquer is applied to the film to create a surface that can be printed with ink.
6. The film roll, which can be up to 92 inches (2,3 m) wide, is cut into narrower rolls.

Moving from homemade holographic display

Depending on the type of film used and the type of product being manufactured, one or more finishing steps may be performed.

• E.g.The film can be laminated to cardboard to give it strength. The film is also cut into the desired shapes for the final product and can be printed with messages. Heat-sensitive or pressure-sensitive adhesive is applied to the back of the holograms which will be affixed to other objects or used as stickers.

Refinement of the homemade holographic display

Holograms are attached to other products or counted and packaged for shipping.

The future of the homemade holographic display

Today, the most common use of holograms is in consumer products and advertising materials. There are also some unusual applications. For example, in some military aircraft, pilots can read their instruments while looking through the windshield using a holographic display projected in front of their eyes. Car manufacturers are considering similar displays for their cars.

Holograms can be created without visible light. Ultraviolet, X-ray, and sound waves can all be used to create them. Microwave holography is being used in astronomy to record radio waves from deep space. Acoustic holography can look through solid objects to record images, much like ultrasound is used to generate images of a fetus inside a woman's womb. Holograms made with short waves such as X-rays can create images of particles as small as molecules and atoms.

Holographic televisions may project performers into viewers' homes within the next decade. Fiber optic communications systems will be able to transmit holographic images of people to distant friends' homes for realistic visits. Just as CD-ROM technology used optical methods to store large amounts of computer information on a relatively small disk, fiber optic communications systems will be able to transmit holographic images of people to distant friends' homes for realistic visits. storage Three-dimensional holographic data storage will further revolutionize storage capabilities. It is estimated that this technology will store an amount of information equivalent to the contents of the Library of Congress in a space the size of a sugar cube.

Homemade holographic screen construction process

Now, let's see how the homemade holographic screen construction process is

Part 1: What you need:

To begin this project, you will need the following:

1. Thin plastic (may be old packaging)
2. A rule
3. Tape
4. Hot glue gun (with hot glue gun sticks)
5. An equilateral triangle to draw
6. Scissors
7. Permanent marker
8. A screen (iPad/smartphone/tablet) you get the idea.

Part 2: Follow-up

Get your permanent marker and trace four equilateral triangles onto your thin plastic using a ruler.

Part 3: Scissors

Now, carefully cut out the triangles you traced with your permanent marker on the plastic.

Part 4: Tape and Glue

2 more images

1. Step 1:: This is where the hot glue and tape come into play, glue the edges on one side of each of your triangles.
2. Step 2:: Once you have glued all the slides together, the plastic shapes are pyramidal.
3. Step 3::The tape is a temporary hold until you glue the sides down permanently with hot glue.
4. Step 4:: Once you glue the sides with hot glue, you can choose whether or not to remove the tape.

Part 5: Tablet time

Go to YouTube and search for: Hologram Jellyfish. From there, you will find several videos that you can use for your hologram pyramid. Hold your pyramid over the center of the screen and look through the side of your pyramid.

Part 6: Enjoy watching your homemade holographic display

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Conclusion

As you can see, you can create your own homemade holographic screen. Just follow the steps we explain and enjoy it. We hope this information has been helpful to you.