Definition:
A reflection hologram is a type of hologram that is used to protect products from counterfeiting. These types of holograms have an image that is stored in a wide emulsion and it can be viewed only in white light. Reflection holograms are used in a huge variety of products like bags, CDs, sunglasses, etc.
Working:
Reflection hologram is a special type of hologram that is incorporated with a three dimensional image which can be seen only in white light or one particular angel. These holograms are made to be multicolored. The visibility of the image depends upon the angel of the light i.e. the object beam and the reference beam.
The image that is imprinted in a reflection hologram is stored inside an emulsion; this is the reason that it is not viewable clearly. The image is rebuilt only at the point when there is a contact between the two beams of light, i.e. the object beam and the reference beam, which are traveling in conflicting directions. If the light that falls on the image is not at the precise angel, then the hologram selects the beam of light itself, that is declining on the necessary angle for it to be visible in multi-color and three dimensions form, and then rebuilt the image. The additional light passes through the hologram with reflecting.
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