Table of Contents
What is reflection hologram?
Reflection holograms are a special category of holograms that are visible using what is often referred to as “white light”. While they are still created with laser light, the structure of the captured holograms allows them to also be viewed without a laser, using more ordinary light sources.
Is a hologram reflection or refraction?
Like photographs, holograms are recordings of reflected light. Making them requires steps that are similar to what it takes to make a photograph: A shutter opens or moves out of the path of a laser. (In some setups, a pulsed laser fires a single pulse of light, eliminating the need for a shutter.)
What are the different types of holograms?
There are two main types of holograms, namely the reflection holograms and the transmission holograms [1]. Reflection holograms are the most common and can be usually found in galleries. A white incandescent light, placed in a specific angle and distance, is used to illuminate the hologram [1].
What is hybrid hologram?
The holograms are hybrid reflection holograms made using the diffractive structures or gratings of a holographic object such as a transmission hologram or holographic optical element (HOE). These hybrid reflection holograms are ideal for security and forgery prevention applications.
How do you describe a hologram?
A hologram (pronounced HOL-o-gram ) is a three-dimensional image, created with photographic projection. Unlike 3-D or virtual reality on a two-dimensional computer display, a hologram is a truly three-dimensional and free-standing image that does not simulate spatial depth or require a special viewing device.
What is a hologram and how does it work?
So, how do holograms work? Holography is a unique method of photography whereby 3D objects are recorded using a laser and then restored as precisely as possible to match the originally recorded object. The reference wave is created directly by the light source, and the object wave is reflected from the recorded object.
Do holograms reflect in a mirror?
If a mirror is the object, the holographic image of the mirror reflects white light; if a diamond is the object, the holographic image of the diamond is seen to “sparkle.”