Since the beginning of holography, amateur experimenters have explored its uses. All the waves have to be identical when they leave the laser. Here's what happens when you turn on a laser to expose a holographic plate: There are a couple of things to keep in mind about the object beam. This changes the texture of the emulsion's surface. As of January 2012 such holographic projectors are in the development stage. Miniature versions of such projectors are in development. In a hologram, the two intersecting light wave fronts form a pattern of hyperboloids -- three-dimensional shapes that look like hyperbolas rotated around one or more focal points. Iridescent flakes are a nice option that dont always sink, and often will float nicely in some resins.. The scattered light from the object beam is out of phase with the reference beam, so when the two beams interact they form an interference pattern. Instead, you might see a dark frame of film or a random pattern of lines and swirls. You're still seeing a virtual image -- your brain's interpretation of light waves that seem to be coming from a real object on the other side of the hologram. Cambridge Press. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. instantly see that the image is dead history: The light from each layer interferes with the light in the layers above it. happens, we can look forward to three-dimensional holographic TV and When this beam illuminates the hologram, it is diffracted by the hologram's surface pattern. object beam on the left passes through the specimen on a slide (red, 10); the high intensity reference beam on the right continues in parallel without touching the specimen. that's simply another way of saying "what the object looks like." The silver halide in the emulsion responds to these light waves just like it responds to light waves in an ordinary photograph. Each of those little pieces will go on spreading on the other side. How Do Holographic Projectors Work? | Sciencing Either way, the sine wave is the carrier wave that is overlaid with a second wave that carries the information.