A hologram is a three-dimensional image generated by light beam interference. Unlike traditional photographs or images, holograms capture both the intensity and phase of light waves, allowing them to recreate a realistic 3D representation of an object or scene. The process of making holograms is called holography.
Unlike 2D images, which capture only the intensity of light, holograms capture both the amplitude and phase of light waves. It allows them to store more information about the light field, enabling the creation of a more realistic 3D image.
Holograms are created by recording the interference pattern between two coherent light sources. One beam, the reference beam, remains unchanged, while the other beam, the object beam, interacts with the recording of the object. The interference pattern is recorded on a photosensitive surface, such as a holographic film or a digital sensor.
Reconstruction of 3D Image
When illuminated with light similar to that used during the recording, the hologram can recreate a three-dimensional image of the original object. The viewer perceives depth, parallax, and other visual cues that contribute to a realistic 3D experience.
These holograms allow light to be transmitted through them, and the 3D image is visible from the side where the light is coming through.
These holograms are viewed by reflecting light off the holographic surface.
Holograms can be applicable for various purposes, including arts and entertainment, security, medical imaging, and scientific visualization.
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