search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
Display Technology


A holographic display, science


without the fi ction


D CIE GTK Classified ads:Layout 1 07/04/2020 11:28 Page 5


isplays are a big part of our lives - we rely on our phones, work from our laptops and computer screens, binge Netflix shows on our smart TVs. The technology has come a long way from the bulky Cathode-Ray Tube television sets to slim augmented reality smart glasses that we wear on our heads. Realising that we can put displays in every corner of our human existence, the big question is “What’s the next wave in display technology?” True 3D display, where a viewer cannot distinguish between the real and the virtual, has always been the ultimate goal and the term “Holographic Display” is often mentioned in this context. Let us look at the origins of holography to put into perspective where we are now.


Historical account


The science of holography dates back to 1947 when Denis Gabor, a hungarian-born physicist-engineer introduced the concept to enhance the image in electron microscopes. His method was ingenious, as it imaged the object using a physical process of diffraction and interference. Unlike photography, which captures the intensity of the object, but disregards the phase, holography preserved the complete pattern, including the 3D nature of the object.


Holography was perfected within the academic labs and better processes and materials to record holograms were developed. Researchers realized that holographic patterns can function in the same way as “classical” optical elements - lenses and mirrors. These earned the


name Holographic Optical Elements (HOEs). The HOE windshield combiner of the Head-Up-Display acts as a big lens, without the associated size and weight. Holograms also found applications in security materials. They are challenging to produce and require specialized equipment, which makes them difficult to forge. All of these applications spun out of the single stroke of insight of Denis Gabor, and the wide applications of the idea earned him the Nobel Prize in Physics in 1971.


A concept of Computer-Generated Holography emerged in the late 1960s. Instead of recording holograms on film or gelatine, one can compute and display the holograms dynamically on devices known as Spatial Light Modulators (SLMs).


Computational challenge In generating CGH, the task is to numerically answer the question, “what pattern has to be displayed on an SLM so that the modulated laser beam diffracts into a 3D shape we desire?”. This in itself is a challenging undertaking, which, back in the 1990s needed a supercomputer. It is complicated still, as SLMs are only capable of displaying some small number of phase states. Doing it in a naive way gives rise to noise, which degrades image quality and ruins the viewing experience. VividQ has bridged the gap by developing a novel set of algorithms to answer this question and do it effectively, achieving high image quality in real time. Our complete software pipeline takes a 3D representation of data and handles the steps from hologram computation all the way to the integration


20 May 2020


Components in Electronics


www.cieonline.co.uk


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44