Brenn Hologram

3D HOLOGRAM

Holographic projection has been around since the 1940s, and while 3D technology has advanced quite rapidly since then, it still has considerable challenges to overcome to give us that “as-seen-in-the-movies” experience. However, some revolutionary 3D holographic pioneers are smashing boundaries in holographic projection and shattering the status quo when it comes to bringing holograms to life.

In this article, we’ll discover more about what holographic projection is, its relationship to holograms and where the future of this technology is headed.

What is a hologram?

Before we travel to the future, let’s take a trip to the past and go back to the very beginning, so that we can find out just what a hologram is and ask ourselves,”what does “holographic” mean exactly”?

The term “hologram” was coined by Dennis Gabor in 1949, a Hungarian-born British electrical engineer and physicist, who later went on to win the Nobel Prize in Physics in 1971, for his work on the invention and development of the “holographic” method.

Hologram is a combination of two Greek words––“holos” meaning “whole,” and “gramma” meaning “message”; coming together to create a whole message, or in other words, a complete picture.

Unlike traditional photography, a hologram is a three-dimensional image, or gives the impression of one. Created using light, sometimes in the form of lasers, there are a number of types of holographic techniques that present varying results.

What are holograms and where may you have seen them?

You have probably seen a hologram this week (if not today). That’s right. Holograms are all around us. Forget those science fiction fantasies of Princess Leia pleading for help, the ones you’re likely to have come across are nowhere near as glamorous. However, they are extremely useful.

The holograms you may have seen are even closer to you than you think...in fact, they’re probably in your back pocket right now. Your credit card or driver’s license are perfect examples.

These holograms are created by splitting a laser beam into two separate beams, using an angled mirror. This then forms an object beam and a reflection beam. Heading in different directions, both are reflected off of other angled mirrors. The object beam is then reflected off of the object that will form the hologram image, and finally onto the end surface (also known as the holographic plate), while the reflection beam is directed straight onto the plate. As these two beams come together the hologram is created.

You may have also seen holograms in the form of product authentications, available on the back of many product packets. Simple and effective, although as we have begun to unpack above, the technology behind them is rather complex.

How to make own 3d holograms Projector?

How can you make your own Hologram Projector at your home in just 5-10 mins.It is very easy and very cheap.You can turn your smartphone into 3D holographic video viewer with this simple DIY projector.

Step 1: Collect All Parts and Tools for Creating This Device.

You only need couple of things for create this device:-

1.Transparent Plastic

2.Graph Paper

3.Pen,Pencil,Scale

4.Scissors and Glass Cutter

5.Tape and Super Glue

6. Smart Mobile

Step 2: Now Let's Start to Make Projector.

First thing you have to do is that you have to make a ruff diagram on Graph paper of pyramid side as shown in image,

here i'll make medium size of pyramid you can reduce or increase as per your requirement.

Now if you want bigger then the Base=18 Cm, Height=10.5 and Top (1 Cm or 2 Cm)is as it is.

Step 3: Cut the Glass

Now cut transparent plastic cover with cutter as dimension as we decide in graph paper,

cut same 4 pics of transparent plastics.

Step 4: Join Glass Pieces Together

Attach transparent plastic with each other by tape of super glue.

Step 5: Search for Video on YouTube.

Now, take your Smartphone and go to YouTube and search hologram videos.

You can find lots of 4 SIDE hologram videos.

Put your hologram projector on center of your smart phone

play videos and make sure to turn off your room lights for batter observation .

The video that make use of this device play the same video from four direction,

and when these are reflected in the panes of your device it look like a floating 3D hologram.

WATCH VIDEO TUTORIAL

Using ultrasonic sound wave to be tested on an oscilloscope

What is Oscilloscope?

An oscilloscope is a machine that shows the wave shape of an electrical signal. When connected to a ultrasonic module they can show the wave signal.

The Arduino ultrasonic module includes transmitters, a receiver and control circuit. This distance sensor works by sending out an ultrasonic wave from the trigger terminal and detecting whether there is a pulse signal back through the echo. If there is a returning pulse signal, it is measured, and the length of time the pulse remains at a peak corresponds to the distance an object is from the sensor.

The longer the returning pulse is, the further the object is away. A short pulse of at least 10 micro sec is supplied to the trigger input to start the ranging, and the module sends out an 8 cycle burst of ultrasound at 40kilohurts, and the echo is raised.

Here is how to calibrate an Oscilloscope:

With the use of Probe
put the ground then the test calibration and setup the settings.

Oscilloscopes principally measure voltage and time. Measuring another physical property such as temperature, pressure, flow, velocity, or displacement on an oscilloscope requires use of a transducer or sensor to convert the measured quantity into voltage. Using the oscilloscope's function you can scale the input voltages into units that match the transducer's input.

Procedure

The 5V DC supply was connected to the VCC pin on the sensor.

The function output was connected to the Trig pin.

All the grounds were connected together

Chanel2 of the oscilloscope was connected to measure the input pulse (Trig).

Chanel4 of the oscilloscope was connected to the Echo pin to measure the returning pulse, if any.

Without any object positioned in front of the sensor, the following was obtained on the screen of the oscilloscope:

The function output was set to produce a low frequency pulse.

The distance was measured, and the waveforms displayed on the oscilloscope were recorded. The waveforms displayed were used to calculate the actual distance the sensor measured from the object.

An object was then positioned in front of the sensor:

And the oscilloscope displayed the following. Here the peak of the returning signal was of a duration of roughly 1.5milli second, the distance measured with the calculated distance of approximately 25cm

The object was then moved closer to and further from the sensor. One such position

The angle of the object to the sensor was also varied to test the sensor’s ability in detecting objects that aren’t straight in front of it.

Here the peak of the returning signal was of a duration of roughly 0.333milli second, and thereby measured a distance of approximately 5.5cm when calculated, which is close to the distance.

The angle of the object to the sensor was also varied to test the sensor’s ability in detecting objects that aren’t straight in front of it. One such position

The waveform displayed on CH4 of the oscilloscope indicates that the object was approximately 25cm from the sensor, thereby showing that the sensor can quite accurately detect the distance it is from an object that is an acute angle. This maximum angle at which the sensor detected the object during testing was approximately 20°.

One negative about this sensor is that it’s blind for the first 2cm, but more importantly, careful mounting must be adhered to, as if it’s positioned too high it won’t detect other robots and if it’s positioned too far back on the robot, it will detect itself and presume it’s an opposition robot