C. Huang, X. Wu, H. Liu, B. Aldalali, J.A. Rogers and H. Jiang
... optical features such as minimum chromatic aberration, wide-angle field of view (FOV), high sensitivity to light and superb acuity to motion. Here, we present lifesized, large-FOV, wide-spectrum artificial RSCEs as optical imaging devices inspired by the unique designs of their natural counterparts. ...
... optical features such as minimum chromatic aberration, wide-angle field of view (FOV), high sensitivity to light and superb acuity to motion. Here, we present lifesized, large-FOV, wide-spectrum artificial RSCEs as optical imaging devices inspired by the unique designs of their natural counterparts. ...
Structure and Imaging of a Transmission Electron Microscope (TEM)
... For high-energy electrons such as 200 keV, the wavelength is 0.0028 nm. The diffraction/scattering angle by 200 lattice planes of gold (d = 0.21 nm) is 0.013 rad (a = k/d = 0.0028 nm/0.21 nm) or 0.74°, which is a very small angle! Also for high-resolution electron microscopy, the size of observing a ...
... For high-energy electrons such as 200 keV, the wavelength is 0.0028 nm. The diffraction/scattering angle by 200 lattice planes of gold (d = 0.21 nm) is 0.013 rad (a = k/d = 0.0028 nm/0.21 nm) or 0.74°, which is a very small angle! Also for high-resolution electron microscopy, the size of observing a ...
Ray Optics - Sakshi Education
... 1. Light is a form of energy which on striking the eye makes things visible (stimulates the sensation of vision). 2. A substance through which light can more or less pass is called optical medium. 3. A medium through which light can pass very easily is called transparent medium. 4. A medium through ...
... 1. Light is a form of energy which on striking the eye makes things visible (stimulates the sensation of vision). 2. A substance through which light can more or less pass is called optical medium. 3. A medium through which light can pass very easily is called transparent medium. 4. A medium through ...
WHITEPAPER Centration Measurement, Alignment
... the VIS, so specialized image processing algorithms are used to reach the required high resolution. OptiCentric® in the standard reflection mode relies on back-reflection from the lens surface, so the light intensity of the reflected reticule image strongly depends on the type of coating used. Typic ...
... the VIS, so specialized image processing algorithms are used to reach the required high resolution. OptiCentric® in the standard reflection mode relies on back-reflection from the lens surface, so the light intensity of the reflected reticule image strongly depends on the type of coating used. Typic ...
52.3: An Improved Polarizing Beamsplitter LCOS Projection
... The purity of polarization extinction is a key element in color consistency, as well as contrast, across the display. Polarization components also contribute to the overall flux efficiency of optical systems. LCOS light valves, in particular, are dependent upon optical architectures built around a p ...
... The purity of polarization extinction is a key element in color consistency, as well as contrast, across the display. Polarization components also contribute to the overall flux efficiency of optical systems. LCOS light valves, in particular, are dependent upon optical architectures built around a p ...
Transformation-designed optical elements
... The transformation method allows one to design continuous media that exert precise and arbitrary control over a field, particularly the electromagnetic field[1][2][3][4]. Even the challenging problem of reflectionless design in arbitrary geometries is quite straight foward. The resulting material sp ...
... The transformation method allows one to design continuous media that exert precise and arbitrary control over a field, particularly the electromagnetic field[1][2][3][4]. Even the challenging problem of reflectionless design in arbitrary geometries is quite straight foward. The resulting material sp ...
University of Groningen Unraveling structure and dynamics by
... Fluorescence Microscopy has been one of the most exploited microscopy techniques since its development in the 1940s. Fluorescence Microscopy is based on the idea that the optical excitation of the sample creates electronic excited states, which then emit light upon relaxation to the ground state. Fl ...
... Fluorescence Microscopy has been one of the most exploited microscopy techniques since its development in the 1940s. Fluorescence Microscopy is based on the idea that the optical excitation of the sample creates electronic excited states, which then emit light upon relaxation to the ground state. Fl ...
Partially Coherent Image Formation Theory for X
... provides the image contrast, phase contrast mechanisms such as differential phase contrast (DIC) [10–14] and Zernike phase contrast [10, 15, 16] are also available. These phase contrast imaging mechanisms are especially attractive at the x-ray wavelengths where phase contrast of most materials is ty ...
... provides the image contrast, phase contrast mechanisms such as differential phase contrast (DIC) [10–14] and Zernike phase contrast [10, 15, 16] are also available. These phase contrast imaging mechanisms are especially attractive at the x-ray wavelengths where phase contrast of most materials is ty ...
concave mirror
... 13. Enter your data into the GoogleDoc. Record the class average when everyone is done. Then calculate the percentage difference between your values and those of your classmates. Show your work for this. Data Table 3: Focal Length using an object distance of “infinity” ...
... 13. Enter your data into the GoogleDoc. Record the class average when everyone is done. Then calculate the percentage difference between your values and those of your classmates. Show your work for this. Data Table 3: Focal Length using an object distance of “infinity” ...
Porous Biomimetic Microlens Arrays as Multifunctional Optical
... on eyes as their photosensory organs for focusing, detection and imaging. Million of years of evolution have perfected the design of the lenses that are used for the image formation by organisms, and resulted in optical structures, whose multifunctional and hybrid characteristics are unparalleled in ...
... on eyes as their photosensory organs for focusing, detection and imaging. Million of years of evolution have perfected the design of the lenses that are used for the image formation by organisms, and resulted in optical structures, whose multifunctional and hybrid characteristics are unparalleled in ...
spatial filtering
... where “f” is the focal length of the “Fourier transform” lens. The magnification (the ratio of the size of the final image to the original) will be i/o, and you will get an image of equal size to the original when o=I=2f. Of course, you will need to have the distance between the aperture and the “F ...
... where “f” is the focal length of the “Fourier transform” lens. The magnification (the ratio of the size of the final image to the original) will be i/o, and you will get an image of equal size to the original when o=I=2f. Of course, you will need to have the distance between the aperture and the “F ...
Partially coherent image formation with x
... investigated the same system with a 2D knife edge as an object. Analyzing the image of a knife edge is a very common and convenient method to check the image quality experimentally. To simulate the partially coherent imaging of a knife edge, Eq. 112 was evaluated numerically with the program SPLAT,1 ...
... investigated the same system with a 2D knife edge as an object. Analyzing the image of a knife edge is a very common and convenient method to check the image quality experimentally. To simulate the partially coherent imaging of a knife edge, Eq. 112 was evaluated numerically with the program SPLAT,1 ...
3D differential interference contrast microscopy using synthetic
... in post-processing. In addition to the contrast enhancement, we also implement depth-selective visualization by angular spectrum method (Chapter 3 in Goodman).10 Conventional holography and quantitative phase microscopy have the ability to image in 3-D by the propagation of the field.22 But their ax ...
... in post-processing. In addition to the contrast enhancement, we also implement depth-selective visualization by angular spectrum method (Chapter 3 in Goodman).10 Conventional holography and quantitative phase microscopy have the ability to image in 3-D by the propagation of the field.22 But their ax ...
High refractive index Fresnel lens on a fiber fabricated by
... manufacturer of the fiber. The intensity of the side lobes is higher than expected from simulations, with the highest side lobe intensity being 9% as opposed to the simulated 1.3%. This might be explained by small fabrication inaccuracies introduced by the FIB and subsequent imprint. Nevertheless, t ...
... manufacturer of the fiber. The intensity of the side lobes is higher than expected from simulations, with the highest side lobe intensity being 9% as opposed to the simulated 1.3%. This might be explained by small fabrication inaccuracies introduced by the FIB and subsequent imprint. Nevertheless, t ...
Ray Diagrams Powerpoint
... Reflection is when light changes direction by bouncing off a surface. When light is reflected off a mirror, it hits the mirror at the same angle (the incidence angle, θi) as it reflects off the mirror (the reflection angle, θr). ...
... Reflection is when light changes direction by bouncing off a surface. When light is reflected off a mirror, it hits the mirror at the same angle (the incidence angle, θi) as it reflects off the mirror (the reflection angle, θr). ...
Document
... Reflection is when light changes direction by bouncing off a surface. When light is reflected off a mirror, it hits the mirror at the same angle (the incidence angle, θi) as it reflects off the mirror (the reflection angle, θr). ...
... Reflection is when light changes direction by bouncing off a surface. When light is reflected off a mirror, it hits the mirror at the same angle (the incidence angle, θi) as it reflects off the mirror (the reflection angle, θr). ...
U-direction
... the camera at the telescope focus in short time. This can be achieved by obtaining some frames where the camera at different positions along the optical axis. Images of some stars are examined to assign the frame whose images have smallest number of pixels. The camera position where such frame is ob ...
... the camera at the telescope focus in short time. This can be achieved by obtaining some frames where the camera at different positions along the optical axis. Images of some stars are examined to assign the frame whose images have smallest number of pixels. The camera position where such frame is ob ...
Resolution and Sampling Considerations
... frequency of 2 samples per cycle is a theoretical minimum sampling rate to resolve an object of 1 cycle in size. In reality, many more samples are usually necessary to actually “resolve” the object. Most microscopists use a sampling rate of between 3-10 samples per object as a rule of thumb (7). Thi ...
... frequency of 2 samples per cycle is a theoretical minimum sampling rate to resolve an object of 1 cycle in size. In reality, many more samples are usually necessary to actually “resolve” the object. Most microscopists use a sampling rate of between 3-10 samples per object as a rule of thumb (7). Thi ...
Lecture_22
... light enters the camera. A faster shutter speed makes a sharper picture. • f-stop: controls the maximum opening of the shutter. This allows the right amount of light to enter to properly expose the film, and must be adjusted for external light conditions. • Focusing: this adjusts the position of the ...
... light enters the camera. A faster shutter speed makes a sharper picture. • f-stop: controls the maximum opening of the shutter. This allows the right amount of light to enter to properly expose the film, and must be adjusted for external light conditions. • Focusing: this adjusts the position of the ...
Non-invasive ophthalmic imaging of adult zebrafish eye using
... of the crystalline lens. Keywords: Eyes, non-invasive ophthalmic imaging, optical coherence tomography, zebrafish. USE of optical techniques for biomedical imaging is a topic of considerable current interest. This is motivated by the potential of optical techniques to provide sub-millimetre resoluti ...
... of the crystalline lens. Keywords: Eyes, non-invasive ophthalmic imaging, optical coherence tomography, zebrafish. USE of optical techniques for biomedical imaging is a topic of considerable current interest. This is motivated by the potential of optical techniques to provide sub-millimetre resoluti ...
Integral holography: white-light single-shot hologram
... 65×65 middle microlenses are employed in the experiment. The focal length of each of the microlenses in the MLA is fMA = 3.3 mm. In order to project the MLA image plane onto the camera with the magnification factor of −2, we have used a spherical imaging lens L2 with a focal length of f2 = 10 cm. A ...
... 65×65 middle microlenses are employed in the experiment. The focal length of each of the microlenses in the MLA is fMA = 3.3 mm. In order to project the MLA image plane onto the camera with the magnification factor of −2, we have used a spherical imaging lens L2 with a focal length of f2 = 10 cm. A ...
infos on Underwater optics theory
... need not go to incomprehensible limits for this. The formulae are shown more to allow the operator to calculate the likely results rather than as a demonstration incomprehensible limits for this. The formulae are shown more to allow the operator to calculate the likely results rather than as a demon ...
... need not go to incomprehensible limits for this. The formulae are shown more to allow the operator to calculate the likely results rather than as a demonstration incomprehensible limits for this. The formulae are shown more to allow the operator to calculate the likely results rather than as a demon ...
Fourier-Space Image Restoration Ronald R. Parenti
... into orbit by a relatively inexpensive launch vehicle. Although the raw imagery produced by a sparse-aperture system would show significant distortions, neardiffraction-limited images can be recovered by using appropriate data processing techniques. To motivate this investigation, we use a three-pet ...
... into orbit by a relatively inexpensive launch vehicle. Although the raw imagery produced by a sparse-aperture system would show significant distortions, neardiffraction-limited images can be recovered by using appropriate data processing techniques. To motivate this investigation, we use a three-pet ...
ABCD law for Gaussian laser beams
... through a distance d and transmission through a thin lens with focal length f (or a concave mirror with focal length f ). From these elements we can derive more complicated systems. The ABCD matrix for a thick lens cannot be constructed from just these two elements. However, we can construct the mat ...
... through a distance d and transmission through a thin lens with focal length f (or a concave mirror with focal length f ). From these elements we can derive more complicated systems. The ABCD matrix for a thick lens cannot be constructed from just these two elements. However, we can construct the mat ...
7.1 textbook answers - aiss-science-9
... b Optical fibres work by passing light along the fibre through totally internal reflection. This requires that the surface of the fibre be very smooth. Scratches on the surface of the optical fibre would prevent the light from being reflected. Instead, the light might be scattered or escape from the ...
... b Optical fibres work by passing light along the fibre through totally internal reflection. This requires that the surface of the fibre be very smooth. Scratches on the surface of the optical fibre would prevent the light from being reflected. Instead, the light might be scattered or escape from the ...