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A thin hologram [1]: Section 4.1 is one where the thickness of the recording medium is much less than the spacing of the interference fringes which make up the holographic recording. The thickness of a thin hologram can be down to 60 nm by using a topological insulator material Sb 2 Te 3 thin film. [9]
In general usage, a hologram is a recording of any type of wavefront in the form of an interference pattern. It can be created by capturing light from a real scene, or it can be generated by a computer, in which case it is known as a computer-generated hologram, which can show virtual objects or scenes.
This hologram is a transmission hologram, where the hologram is illuminated on one side, and viewed from the other. Illumination and viewing can be done from the same side if the hologram is mounted onto a reflective surface. Mass replication of such holograms can be done using an embossing process. [3]
The spacecraft passed 3.8 million miles (6.1 million km) from the solar surface on Dec. 24, flying into the sun's outer atmosphere called the corona, on a mission to help scientists learn more ...
If the recorded field is superimposed on the "live field" scattered from the object, the two fields will be identical. If, however, a small deformation is applied to the object, the relative phases of the two light fields will alter, and it is possible to observe interference. This technique is known as live holographic interferometry.
Ordinary holograms are three-dimensional images encoded in a two-dimensional surface, such as the hologram on a typical credit card. "This time, the entire universe is encoded," he said.
Billing itself as the world’s “first holographic communications platform,” US startup Proto is beaming life-size, “3D” video into universities, hotels and medical centers.
A halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk') [1] is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky.