Holograms are images that are captured in a three-dimensional form and are presented on a two-dimensional surface. When looking at holograms, one might have the sensation that the image being seen is actually right in front of him or her, when in fact, it is not. These holographic images are like looking at a three-dimensional movie without having to use the special three-dimensional glasses. There are many types of holograms, such as an embossed hologram, a reflection hologram and a rainbow hologram, to name a few.
An embossed hologram is a transparent type of image that typically is used in security measures because the image is extremely complex and difficult to recreate. Embossed images have one single color for each light source being used. After an image is created, a mirror effect is placed behind the original picture, which creates an effect that makes it seem as if the original image has been multiplied. The image is embedded into an object by the heat and pressure of a metal stamp. Embossed holograms are more commonly seen in everyday life.
A reflection hologram forms an image by reflecting light. Reflection holograms are created when a white incandescent light is used to light the image, which in turn causes the holographic effect. Light is held at a precise angle and distance, and the holographic picture is shown on the same side as the person viewing the image. With this type of hologram, a person is seeing the image in a true three-dimensional form, up close and personal. Unlike others, this hologram can be seen in regular light.
Rainbow holograms are also known as Benton holograms, after Dr. Stephen Benton, who was the creator of this type of image. It is best described as a hologram of a hologram, with one light being shown in various directions. This causes the viewer to see different colors that change depending on the stance of the viewer when the image is being projected. If viewing this image from above or below, the image might not appear to change even though it has.
Holographic images are used in many different ways. Some are used on stationary items such as credit cards and stickers, and others are used as light sources in many light shows that are seen in places such as theme parks. Wherever one might see them, they can bring a sense of joy and excitement to people of all ages.