Who invented peppers ghost

Credit for inventing holograms is usually given to Hungarian physicist Dennis Gabor. His work on optical physics led to breakthroughs in the field of holography in the s. Holograms are made by using lasers. If you shine a laser through a prism, the entire beam bends together, since all of its waves are the same size. Holograms are made by using a single laser beam. The beam is then split into two beams by a special lens. In real life, holograms are virtual three-dimensional images created by the interference of light beams that reflect real physical objects.

There are two ways to create holograms: via computer — with augmented reality glasses, and physical — for optical displays. The mirascope is a toy made of two parabolic mirrors that fascinates children and adults alike.

The two mirrors work together and project a small object placed at the bottom to the top, creating a hologram-like illusion Figure 1a-b. The name mirascope seems to be a blend of the two words: mirage and scope. Most of the movement is from simple turntables. As you look down into the ballroom, the glass reflects the image of the ghostly audio-animatronics that are below you.

As lights pointed onto the animatronic figures turn on and off, they illuminate or darken the figures — making them appear and disappear. Monitor ghosting occurs when an image artifact appears as a trail of pixels behind a moving object, almost like a motion blur. This is referred to as ghosting because it creates a trace of the image that looks like a ghost. Creating a ghost effect for video is quite simple, as long as you have an editing package capable of using layers and setting layer opacity.

Shoot the scene empty without the ghost , then shoot the scene again with the ghost actor. Holograms are key to our technology as they allow the manipulation of light: controlling its flow and direction. The actor would stand across from a glass pane placed perpendicular to the theater floor. Through light manipulation, the ghost would illuminate onto the stage.

The strength of the light determined how strong the apparition appeared on stage. The placement of the glass on the stage then reflected the actor to the audience on stage. This simple technique is still used today in amusement park attractions and rides. His technique could fit into almost any existing theater venue design. To use this trick, two rooms are necessary.

The audience is facing one room, unaware of a second identical room. The second room holds objects or the actor out of sight of the viewer, only to be visible once light enters the space.

The main room has a plate of glass placed at a 45 degree angle. When light enters the second room, the main room dims its lights to make the effect stand out. The reflection shows the hidden objects and actor within the second room, appearing in the main room out of thin air. This method is still popular in carnival shows like Girl to Gorilla, a film you can preview below this text.

To design a haunting hologram for Halloween, you will need a few materials to get started. The main components throughout are a pane of glass, a light source, and a space to setup your scene. I recommend starting small with a shoe box sized display to test your idea. Have your glass be placed 45 degrees between the two spaces. Then project your light into the second room holding your objects, while your main room remains empty.

An alternative method to making this age old illusion, is to use modern day technology. Pre-made 3D models get made on computers, smartphones and animation software. These images are then projected onto an Optical Beam Splitter on stage. These holograms come across in a crisp, clear high definition displays. This helps make the holograms appear even more life like being fully rendered. Old footage of performers can be altered in animation software to bring dead celebrities back to life.

Famous performances like Tupac at Coachella in and Michael Jackson at the Billboard Music Awards in make use of such technology. Programs like p5. You are also not limited to just using a glass mirror or Plexiglas to bring holograms into the real world. A smartphone can be all you need to summon fantastic illusions and holograms.

There are a few tips and tricks you will need to obtain this illusion, which can be found in the video above. It creates 3D images off a 2D surface. How is it different? Encourage students to take their time. Details Activity Length 15 mins.

Objectives Describe the locations of the real image, virtual image and reflection of light occurring in this activity. Compare this optical illusion to the light physics of an actual hologram. Make observations and develop questions for further exploration. Place your pyramid in the middle of your screen with the narrow end facing down. Dim the lights in the room and look through the side of the pyramid!

What observations can you make? Extensions What is it about the projection pyramid that makes the illusion work? Try changing some variables i. Draw a ray diagram showing how light is reflected from the screen to your eye.