Other secure uses include apparel hang tags, certificates (tag registration, diamond jewellery, etc.,) tickets (theatre shows, sporting event, etc.,), coupons (gift vouchers, payment receipts, etc.,) and many kinds of identification and membership cards. Holograms also grace currencies and passports in many countries. High security holograms are used on excise labels on liquor bottles in many states of India, as well as on bank demand drafts and a variety of government issued bonds and certificates. Security holograms are very difficult to forge because they are replicated from a master hologram which requires expensive, specialized and technologically advanced equipment
This technique is image based rendering. PROJECTOR AND COMBINER: PROJECTOR: The transformed image must be shone on to the cloak. The image is sent through an opening controlled by iris diaphragm .Its is made of thin opaque plates and rings to change the diameter. The size of the opening must be in the size of the pin hole to ensure larger depth of field. larger field depth allows the screen to be located at any difference from the projector.
Telescopes collect a larger amount of light compared to your eyes therefore resulting in a brighter image Telescopes can resolve more detail than your eye without the need of any assistance such as glasses Telescopes can magnify images so you can see in more detail The behaviour of light passing through different media There are two types of telescopes -refractors and reflectors. The
Among them are double random phase encoding (DRPE) , digital holography , Fractional Fourier transform FrFT , , optical exclusive- OR , virtual (digital) optics , watermarking, and polarization . These techniques use a complete optical set up which include; source light, lenses, mirrors, splitters, spatial filters, gratings…etc. Conventional optical encryption techniques are based on the classical 4-f system architecture ,see figure 1.1, , A two-lens processor, that uses two fixed random phase-masks one in the input and the other in the Fourier plane, respectively. In this technique the original image will converted into a stationary white noise  and the encrypted data is complex and have to be stored holographically. To record high quality approximations of both the amplitude and phase of complex valued wavefronts output by the optical encryption systems, digital holographic techniques have been used.
The aperture diameter, rim angle and absorber size and shape may be used to define the concentrator .The absorber tube may be used better performance .Depending on the temperature different heat transfer liquids may be used. Reflectors may be of anodized aluminium sheet, aluminized Mylar or curved silvered glass. Since it is difficult to curve a very large glass, mirror strips are sometimes used in the shape of parabolic cylinder. The reflecting part is fixed on a light weight structure. The concentration ratio for a cylindrical absorber varies from 5-30.
Concept of Close Range Photogrammetry Close Range Photogrammetry technique basically works on the principle of Triangulation. Photographs are taken from at least two different locations and for each location line of sight is developed. These lines of sight mathematically intersected to produce three dimensional coordinates of point of interest. In the figure 1.1 shown below there are four camera positions from where photographs are taken. In first step multiple overlapping of the scene are recorded by referencing 2D positions of feature point on two or more photographs then determination of 3D coordinates of these features happens via a process called “Photogrammetric Bundle
And with the rapid evolution and advancements in visual CGI effects and moviemaking tools, even more fantastical, hyper-detailed visualizations of the imagination are possible. The rise in digital filmmaking technology has made it easier to depict a more accurate picture of the digital
Nevertheless, the institution should pay more attention to the factor "Holographic technology used in conducting practical training" which is the factor that currently received the least response with rating of 1. It is a quite important factor which has a weight of 0.10. The company should make use of this opportunity to use this technology in teaching and practical training in their campus, for instance medical or health science courses to enhance the understanding of