Part I : Theory of two
... • The optical absorption in reduced crystals (due to intrinsic defects) decreases • The intensity of X-ray-induced luminescence increases by several orders of magnitude while other related properties, such as width and energy of the band, also change abruptly. • The absorption edge shows a blueshift ...
... • The optical absorption in reduced crystals (due to intrinsic defects) decreases • The intensity of X-ray-induced luminescence increases by several orders of magnitude while other related properties, such as width and energy of the band, also change abruptly. • The absorption edge shows a blueshift ...
Many other important inventions involve the use of
... which use a CCD camera to examine a sample, and the image is shown directly on a computer screen without the need for optics such as eye-pieces. Other microscopic methods which do not use visible light include scanning electron microscopy and transmission electron microscopy. A simple microscope is ...
... which use a CCD camera to examine a sample, and the image is shown directly on a computer screen without the need for optics such as eye-pieces. Other microscopic methods which do not use visible light include scanning electron microscopy and transmission electron microscopy. A simple microscope is ...
Beam steering with spatial light modulators: Quantisation effects
... hologram design. From now on, we will develop the experimental details that need to be taken into consideration in hologram computation. For this purpose, we created a Matlab program. Due to the SLM non-flatness [4], a modification to the described holograms has to be made: the full area of the SLM ...
... hologram design. From now on, we will develop the experimental details that need to be taken into consideration in hologram computation. For this purpose, we created a Matlab program. Due to the SLM non-flatness [4], a modification to the described holograms has to be made: the full area of the SLM ...
Topic 4.5 - Aurora City School
... • The new wavefront would then be the surface that is tangent to all the forward wavelets from each point on the old wavefront. • We can easily see that a plane wavefront moving undisturbed forward easily obeys this construction. ...
... • The new wavefront would then be the surface that is tangent to all the forward wavelets from each point on the old wavefront. • We can easily see that a plane wavefront moving undisturbed forward easily obeys this construction. ...
Microscopy Basics
... Bright field microscopy is based on absorption of light in the sample. Most biological objects, however, absorb only weakly in the visible spectrum. This lead to: • Development of specific staining (nowadays almost entirely replaced by fluorescent labeling) • Development of UV microscopy (Köhler) fa ...
... Bright field microscopy is based on absorption of light in the sample. Most biological objects, however, absorb only weakly in the visible spectrum. This lead to: • Development of specific staining (nowadays almost entirely replaced by fluorescent labeling) • Development of UV microscopy (Köhler) fa ...
Apparatus and method for producing holograms with acoustic waves
... Referring now to FIGURE 3, the spatial frequency ?ected from the object. The output of the microphone on line 15 is ampli?ed ‘by ampli?er 16 and ?ltered by narrow f0 of acoustic waves incident on detection plane D'— D’ at the angle 6 is representable as in = l/Ao sin '7 band ?lter 17. The center fre ...
... Referring now to FIGURE 3, the spatial frequency ?ected from the object. The output of the microphone on line 15 is ampli?ed ‘by ampli?er 16 and ?ltered by narrow f0 of acoustic waves incident on detection plane D'— D’ at the angle 6 is representable as in = l/Ao sin '7 band ?lter 17. The center fre ...
INTERFERENCE
... Both of these involve splitting the light from a single source into two beams. Division of amplitude This involves splitting a single light beam into two beams, a reflected beam and a transmitted beam, at a surface between two media of different refractive index. ...
... Both of these involve splitting the light from a single source into two beams. Division of amplitude This involves splitting a single light beam into two beams, a reflected beam and a transmitted beam, at a surface between two media of different refractive index. ...
Interference with monochromatic light
... the observation screen only if the source consists of a point. As soon as the source is laterally extended, the same point x, y on the screen is attained by many light rays, all with different ϑ. It is obvious that the contrast in the interference pattern then must decrease. Loss of contrast will al ...
... the observation screen only if the source consists of a point. As soon as the source is laterally extended, the same point x, y on the screen is attained by many light rays, all with different ϑ. It is obvious that the contrast in the interference pattern then must decrease. Loss of contrast will al ...
Geometrical Optics: Curved Mirrors Worksheet Part I:
... Drag the object back and forth. In this animation, when the image is on the left of the mirror it is a real image, but when it is on the right it is a virtual image. Place the object so that the image is to the right of the mirror (a virtual image). Now, let’s identify where your eye/brain thinks th ...
... Drag the object back and forth. In this animation, when the image is on the left of the mirror it is a real image, but when it is on the right it is a virtual image. Place the object so that the image is to the right of the mirror (a virtual image). Now, let’s identify where your eye/brain thinks th ...
pp. 273
... repeated the same quadruple exposure experiment, but we processed the film to a y = 2. Curve A of Fig. characterizes the storage process. The resulting retrievals* are shown in Fig. 13. Crosstalk in this case is disturbing, while in Fig. 11 it is virtually undetectable. One technique to suppress the ...
... repeated the same quadruple exposure experiment, but we processed the film to a y = 2. Curve A of Fig. characterizes the storage process. The resulting retrievals* are shown in Fig. 13. Crosstalk in this case is disturbing, while in Fig. 11 it is virtually undetectable. One technique to suppress the ...
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.