Topics Discussed... 1. INTRODUCTION 2. Hologram & Holography 3. History of holography 4. Photography vs Holography 5. HOLOGRAM- Recording & Reading 6. Usages 7. Types of hologram 8. Holographic Memory 9. Holographic Versatile Discs (HVD) 10.Applications 8/29/22 10:42:19 PM 2 Hologram & Holography A hologram is a flat surface that, under proper illumination, appears to contain a three-dimensional image. Holography is the Nobel award-winning science The hologram presents a true three dimensional recreation of the original ...
HOLOGRAM NEDR ? Hologram, orijinal objenin uc boyutlu gercek kayd, ksaca uc boyutlu lazer fotorafdr. Hologramlarn en buyuk ozellikleri uc boyutlu goruntuleri yanstmalardr. Baka bir deyile; 3 boyutlu fotoraflarn lazer teknolojisiyle kaydedilmesi, depolanmas ve hareket efektinin kazandrlarak cok boyutlu ortama aktarlmas sonucu elde edilir. Bu fotoraflar hareket edebilme becerisine sahiptirler. Hologramn uretilmesi icin uygulanan teknie ise holografi ad verilir. HOLOGRAMIN TARH Hologram, ilk kez 1947 senesinde Gabor tarafndan k dalgalarnn film uzerinde coalmas fikriyle elde edilen desenlerden oluturulmutur. 1960 senesine gelindiinde ...
• Record of light scattered from an object • Same light field is ‘reconstructed’ without original object present • Requires laser for tight control of light source and light field • Appears 3-dimensional • ‘Object’ beam –Beam is spread and illuminates scene to be recorded • ‘Reference’ beam –Beam is directed to recording medium w/o scattering off of object • Beams create interference pattern on recording medium • When light similar to reference is shined ...
Contents Introduction Magnetic and conventional optical data storage technologies are approaching physical limits beyond which individual bits may be too small or too difficult to store. Holographic data storage is an approach of storing information throughout the volume of a medium—not just on its surface. With the rapidly increasing demand for increased storage capacity in a smaller space, this technology offers an economy in price. Features Next – Next generation Technology 1 HVD = 5800 CDs = 830 DVDs ...
Holography 2 History of Holography • Invented in 1948 by Dennis Gabor for use in electron microscopy, before the invention of the laser • Leith and Upatnieks (1962) applied laser light to holography and introduced an important off-axis technique 3 Conventional vs. Holographic photography • Conventional: –2-d version of a 3-d scene –Photograph lacks depth perception or parallax –Film sensitive only to radiant energy –Phase relation (i.e. interference) are lost 4 Conventional vs. Holographic photography ...
We propose to by-pass electronic recalling by using the SPHRAM-JTC architecture INPUT IMAGE HOLOGRAPHIC FT LENS MUX/ DEMUX BEAM EXPANDER IMAGE HOLOGRAPHIC SHUTTER S2 FLATTENING MEMORY UNIT REDUCING BEAM TELESCOPE EXPANDER FILTER IMAGE SHUTTER APERTURE S1 FT LENS REDIRECTOR REDIRECTOR DYNAMIC CORRELATION BEAM HOLOGRAM SHUTTER ARRAY IMAGING BEAM CCD DEFLECTOR TTAARGRGEET T IIDD:: 77996688 TTAARRGGEET T IID:D: 77996688002233 IMAGING CCD RETRIEVED IMAGE READ LASER Images stored in the Super-Parallel Holographic RAM will be correlated in a translation-invariant manner. We will ...
Topics covered: • What is holography? • History of holography – Timeline • Basic terms and concepts in holography – Interference – Fresnel Zone Lens – Visibility – Influence of polarization – Holographic recording and reconstruction • Fundamental Imaging Techniques in Holography • Formation of holograms in general • Basic holography equations • Holography in everyday life • Interesting articles to read on holography What is holography? Holography is a technique that allows the light scattered from an object to ...
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