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36 Sheets A4 Holographic Paper Sticker Transparent Waterproof Self Adhesive Film 11.7 x 8.3 Inches (Gem, Dot, Colorful, Star)

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A hologram represents a recording of information regarding the light that came from the original scene as scattered in a range of directions rather than from only one direction, as in a photograph. This allows the scene to be viewed from a range of different angles, as if it were still present. On top of reusability and not needing any developing or chemicals, another advantage with this type of photochromic film is that it does not need gelatin, which renders it a vegan alternative. However, the main disadvantage is still the film's very slow exposure, requiring hours of exposure time. This means that currently this type of film can be used only in ultra-long-exposure film photography where the subject is e.g. a city center where the photographer wants to fade all movement. [61]

Although cellulose acetate or " safety film" had been introduced by Kodak in 1908, [45] at first it found only a few special applications as an alternative to the hazardous nitrate film, which had the advantages of being considerably tougher, slightly more transparent, and cheaper. The changeover was completed for X-ray films in 1933, but although safety film was always used for 16mm and 8mm home movies, nitrate film remained standard for theatrical 35mm films until it was finally discontinued in 1951. [46] Claire Elise Campton (17 August 2016). "Film Photography". Photopholio. Archived from the original on 19 September 2016 . Retrieved 17 August 2016. Holography film is widely used for brand protection, increases the brand value and protects against counterfeiting of the end products by making it completely holographic. A hologram can be made by shining part of the light beam directly into the recording medium, and the other part onto the object in such a way that some of the scattered light falls onto the recording medium. A more flexible arrangement for recording a hologram requires the laser beam to be aimed through a series of elements that change it in different ways. The first element is a beam splitter that divides the beam into two identical beams, each aimed in different directions:Holography is a technique that enables a wavefront to be recorded and later reconstructed. It is best known as a method of generating real three-dimensional images, but also has a wide range of other applications. In principle, it is possible to make a hologram for any type of wave. In a hologram, the two intersecting light wave fronts form a pattern of hyperboloids — three-dimensional shapes that look like hyperbolas rotated around one or more focal points. You can read more about hyperboloidal shapes at Wolfram MathWorld. Holography may be better understood via an examination of its differences from ordinary photography: Just like with a photograph, the result of this process is a piece of film that has recorded the incoming light. However, when you develop the holographic plate and look at it, what you see is a little unusual. Developed film from a camera shows you a negative view of the original scene — areas that were light are dark, and vice versa. When you look at the negative, you can still get a sense of what the original scene looked like.

The Hungarian- British physicist Dennis Gabor (in Hungarian: Gábor Dénes) [1] [2] was awarded the Nobel Prize in Physics in 1971 "for his invention and development of the holographic method". [3] Well, you may not know it, but making holograms was not always this easy Usually, after creating your hologram with the laser, you still had one of the hardest parts ahead of you: the developing. For years and years, holograms have typically been made on silver-halide emulsion film, very much like a higher resolution version of the film in traditional cameras. The concentration of dyes or silver halide crystals remaining on the film after development is referred to as optical density, or simply density; the optical density is proportional to the logarithm of the optical transmission coefficient of the developed film. A dark image on the negative is of higher density than a more transparent image. A photograph can be recorded using normal light sources (sunlight or electric lighting) whereas a laser is required to record a hologram. H&D curve of film vs digital". Archived from the original on September 23, 2015 . Retrieved August 11, 2015.Krakow, Gary. "How to Make Holograms at Home." MSNBC. 5/6/2005 (4/9/2007) http://www.msnbc.msn.com/id/7759505/ But when you look at a developed piece of film used to make a hologram, you don't see anything that looks like the original scene. Instead, you might see a dark frame of film or a random pattern of lines and swirls. Turning this frame of film into an image requires the right illumination. Spectratek’s mastering and manufacturing techniques create consistently bright holographic diffraction films over long manufacturing runs. Liou, Yea Wenn; Wang, Chong Mou (2000), "Reusable photographic films based on iron-containing clay minerals", Chemical Communications: 27–28, doi: 10.1039/A908503C

Day Lance McNeil Ian (2002). Biographical Dictionary of the History of Technology. Routledge. p.631. ISBN 1-134-65020-5. Another reusable film invented by Liou et al. is based on 9-methylacridinium-intercalated clay particles, but erasing the image requires dipping the material in sulfuric acid. [62] Image gallery [ edit ] A hologram is a recording of an interference pattern which can reproduce a 3D light field using diffraction. The reproduced light field can generate an image which still has the depth, parallax, and other properties of the original scene. [5] A hologram is a photographic recording of a light field, rather than an image formed by a lens. The holographic medium, for example the object produced by a holographic process (which may be referred to as a hologram) is usually unintelligible when viewed under diffuse ambient light. It is an encoding of the light field as an interference pattern of variations in the opacity, density, or surface profile of the photographic medium. When suitably lit, the interference pattern diffracts the light into an accurate reproduction of the original light field, and the objects that were in it exhibit visual depth cues such as parallax and perspective that change realistically with the different angles of viewing. That is, the view of the image from different angles represents the subject viewed from similar angles. In this sense, holograms do not have just the illusion of depth but are truly three-dimensional images.One method of mass-producing holograms is coating this surface in metal to strengthen it, then using it to stamp the interference pattern into metallic foil. A lot of the time, you can view these holograms in normal white light. You can also mass-produce holograms by printing them from a master hologram, similar to the way you can create lots of photographic prints from the same negative. In 2013 Ferrania, an Italy-based film manufacturer which ceased production of photographic films between the years 2009 and 2010, was acquired by the new Film Ferrania S.R.L taking over a small part of the old company's manufacturing facilities using its former research facility, and re-employed some workers who had been laid off 3 years earlier when the company stopped production of film. a b Peres, Michael R. (2008). The concise Focal encyclopedia of photography: from the first photo on paper to the digital revolution. Burlington, Mass.: Focal Press/Elsevier. p.75. ISBN 978-0-240-80998-4. For those unfamiliar with these concepts, it is worthwhile to read those articles before reading further in this article.

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