Off-axis compressed holographic microscopy in low
... minimization constraint restricted to the actual support of the output image, to enhance image quality. We consider the holographic detection of an object field E of small amplitude with a reference (or local oscillator) field ELO of much larger amplitude, to seek low-light detection conditions, usi ...
... minimization constraint restricted to the actual support of the output image, to enhance image quality. We consider the holographic detection of an object field E of small amplitude with a reference (or local oscillator) field ELO of much larger amplitude, to seek low-light detection conditions, usi ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
... 2. State why crosswires cannot be used in Huygen’s eyepiece? 3. What are coherent sources? 4. In Newton’s rings experiment, the diameter of the 8th ring changes from 1.4cm to 1.27cm when a liquid is introduced between the lens and the plate. Calculate the refractive index of the liquid. 5. Define re ...
... 2. State why crosswires cannot be used in Huygen’s eyepiece? 3. What are coherent sources? 4. In Newton’s rings experiment, the diameter of the 8th ring changes from 1.4cm to 1.27cm when a liquid is introduced between the lens and the plate. Calculate the refractive index of the liquid. 5. Define re ...
Lecture 27
... e.g. Photograph with SLR camera with Fuji “minicopy” film. The negative is the hologram. ...
... e.g. Photograph with SLR camera with Fuji “minicopy” film. The negative is the hologram. ...
Assignment #2 - Rose
... 3. (Saleh and Teich 3.2-1) An argon-ion laser produces a Gaussian beam of wavelength 488 nm and waist spot size of 0.5 mm. Design a single-lens optical system for focusing the light to a spot diameter of 100 m. What is the shortest focal-length lens that may be used? (There are two ways to approach ...
... 3. (Saleh and Teich 3.2-1) An argon-ion laser produces a Gaussian beam of wavelength 488 nm and waist spot size of 0.5 mm. Design a single-lens optical system for focusing the light to a spot diameter of 100 m. What is the shortest focal-length lens that may be used? (There are two ways to approach ...
Holografie – lasery
... Figure: Gabor in-line hologram Gabors method had two stages. In the first stage, the object was illuminated by an electron beam. This beam was partially scattered from the object. The scattered wave then interfered with the primary beam and the interference pattern was recorded on a photographic pla ...
... Figure: Gabor in-line hologram Gabors method had two stages. In the first stage, the object was illuminated by an electron beam. This beam was partially scattered from the object. The scattered wave then interfered with the primary beam and the interference pattern was recorded on a photographic pla ...
Methods and Applications of Optical Holography
... for advertising purpose. The second reason is that they are easy recognizable by inexperienced user – that allows almost every user to identify them without any equipment – so called “first line inspection”. The third reason is that manufacture of holograms and OVID is complicated, it requires expen ...
... for advertising purpose. The second reason is that they are easy recognizable by inexperienced user – that allows almost every user to identify them without any equipment – so called “first line inspection”. The third reason is that manufacture of holograms and OVID is complicated, it requires expen ...
Document
... The last two terms contain the complex field U1 and its U1* . An observer positioned behind the hologram will see at position z behind the transparency an image that resembles the original object (field U1 ). Field U * indicates “backward” propagation, such that a second (virtual) image is form ...
... The last two terms contain the complex field U1 and its U1* . An observer positioned behind the hologram will see at position z behind the transparency an image that resembles the original object (field U1 ). Field U * indicates “backward” propagation, such that a second (virtual) image is form ...
Holography
... In-line Hologram (Gabor) The technique of straightforward holography developed by Gabor places the light source and the object on the axis perpendicular to the holographic layer. Only transparent objects can be considered. If an axial point O is chosen as an object emitting a spherical wave the res ...
... In-line Hologram (Gabor) The technique of straightforward holography developed by Gabor places the light source and the object on the axis perpendicular to the holographic layer. Only transparent objects can be considered. If an axial point O is chosen as an object emitting a spherical wave the res ...
219_cha.pdf
... computers, can be processed in two ways, first the two holograms can be superimposed and it’s reconstruction gives the intensity interferogram superimposed on the image of the object [14-17], second the individual phases of two numerically reconstructed wavefronts are calculated and can be compared ...
... computers, can be processed in two ways, first the two holograms can be superimposed and it’s reconstruction gives the intensity interferogram superimposed on the image of the object [14-17], second the individual phases of two numerically reconstructed wavefronts are calculated and can be compared ...
tutorial #10 [wave nature of light] .quiz
... 1) A beam of light is sent directly down onto a glass plate, ng = 1.5, and a plastic plate, np = 1.2, that form a thin wedge of air as shown in fig. 1. An observer looking down through the glass plate sees the fringe pattern shown in the lower part of the drawing, with the dark fringes at the ends A ...
... 1) A beam of light is sent directly down onto a glass plate, ng = 1.5, and a plastic plate, np = 1.2, that form a thin wedge of air as shown in fig. 1. An observer looking down through the glass plate sees the fringe pattern shown in the lower part of the drawing, with the dark fringes at the ends A ...
Holography - Princeton University
... Reflection holograms get their name from the fact is why transmission are holograms. not visible in ...
... Reflection holograms get their name from the fact is why transmission are holograms. not visible in ...
principles of recording image-matrix holographic stereogram
... Fig.2 Reconstruction from holographic stereogram the set of parallax images into successive zones of viewing (apertures). Results and discussion. The most important thing which helps us to see the world in three-dimensions is the phenomenon of parallax. When you look at an object, you see only the f ...
... Fig.2 Reconstruction from holographic stereogram the set of parallax images into successive zones of viewing (apertures). Results and discussion. The most important thing which helps us to see the world in three-dimensions is the phenomenon of parallax. When you look at an object, you see only the f ...
Holography
Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than of an image formed by a lens, and it is used to display a fully three-dimensional image of the holographed subject, which is seen without the aid of special glasses or other intermediate optics. The hologram itself is not an image and it is usually unintelligible when viewed under diffuse ambient light. It is an encoding of the light field as an interference pattern of seemingly random variations in the opacity, density, or surface profile of the photographic medium. When suitably lit, the interference pattern diffracts the light into a reproduction of the original light field and the objects that were in it appear to still be there, exhibiting visual depth cues such as parallax and perspective that change realistically with any change in the relative position of the observer.In its pure form, holography requires the use of laser light for illuminating the subject and for viewing the finished hologram. In a side-by-side comparison under optimal conditions, a holographic image is visually indistinguishable from the actual subject, if the hologram and the subject are lit just as they were at the time of recording. A microscopic level of detail throughout the recorded volume of space can be reproduced. In common practice, however, major image quality compromises are made to eliminate the need for laser illumination when viewing the hologram, and sometimes, to the extent possible, also when making it. Holographic portraiture often resorts to a non-holographic intermediate imaging procedure, to avoid the hazardous high-powered pulsed lasers otherwise needed to optically ""freeze"" living subjects as perfectly as the extremely motion-intolerant holographic recording process requires. Holograms can now also be entirely computer-generated and show objects or scenes that never existed.Holography should not be confused with lenticular and other earlier autostereoscopic 3D display technologies, which can produce superficially similar results but are based on conventional lens imaging. Stage illusions such as Pepper's Ghost and other unusual, baffling, or seemingly magical images are also often incorrectly called holograms.