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Diffraction Limited Astronomical Imaging Through the Atmosphere
Diffraction Limited Astronomical Imaging Through the Atmosphere

... for building a low noise camera and knowing how to use it to its best advantage; and John Baldwin for developing the original concepts on which this work is based. Both John and Craig have guided me through this project, tactfully correcting my conceptual errors, providing a mathematical background ...
Temporal evolution of the angular response of a PVA/acrylamide photopolymer
Temporal evolution of the angular response of a PVA/acrylamide photopolymer

... points on the same diffraction efficiency curve. In order to determine the angular response at different points of the same diffraction efficiency curve, it is necessary to obtain various holograms with diffraction efficiencies corresponding to different points on the same graph and determine the an ...
TUPB049
TUPB049

... It is clear that summing the projections without the application of the algorithm leads to a loss of contrast and a consequent reduction of the visibility, while for the projections of the matched images the effect is strongly reduced. The interferogram as sum of the unmatched images is presented in ...
Intraframe Scene Capturing and Speed Measurement Based on
Intraframe Scene Capturing and Speed Measurement Based on

... 3.1. Description of a Global Shutter Pixel. A fundamental component of a global shutter (or snapshot) pixel [6] is a sample-and-hold (S/H) switch with analog storage (all parasitic capacitances in the amplifier input) and a source follower amplifier, which acts as a buffer amplifier to isolate the s ...
Methods of measuring the modulation transfer function
Methods of measuring the modulation transfer function

... to reduce the density on the low density side. Chemical diffusion effects are most marked in developers of low concentration and high pH [27]. If this effect is absent, then most workers agree that the effective exposure technique using the macro-characteristic curve allows Fourier techniques to be ...
Electron Beam Lithography
Electron Beam Lithography

... with acceleration voltage of 40 kV). Compare the result to the wave length of visible light (600 nm). ...
Laser Chemosensor with Rapid Responsivity and Inherent Memory
Laser Chemosensor with Rapid Responsivity and Inherent Memory

IOSR Journal of Applied Physics (IOSR-JAP)
IOSR Journal of Applied Physics (IOSR-JAP)

... fullerene and nanotubes into chemical composition of polymers gives one more opportunities for their study and application as composite materials, films, and fibers serving different purposes [13]. Plasma treatment have distinct advantages over other methods, modifications are limited to the surface ...
Retinal illuminance from vertical daylight openings in office
Retinal illuminance from vertical daylight openings in office

... in front of the person to make them comparable with each other and with results in the daylight situation. The preset for the electric lighting creates a constant average illuminance level on the desk (800 lux, see Table 2). The position of the eye differs according to both the task the person is do ...
Diffractive optical elements stored on photopolymers
Diffractive optical elements stored on photopolymers

... material compositions and different thicknesses. The size of the error bars included in the figures indicates the repeatability or our experiments. This repeatability decreases when there are variations of the humidity and temperature in our laboratory during the drying process. Let us begin the ana ...
Dual-pixel CMOS APS Architecture for Intra
Dual-pixel CMOS APS Architecture for Intra

... certain objects between two frames, or image sequences. On the other hand, intra-frame methods [2-6] measure the displacement during the exposure, thus capable of providing speed estimates based on a single image. For the latter case, there are only a few publications available [2-4]. In these paper ...
LS1-60 luminance standard
LS1-60 luminance standard

... aperture. External light incident on the viewing opening does not affect accuracy. 2. The LS1-60-D, which is fitted with an opal glass window. With this the luminance standard can be used for calibration of luminance meters with wider acceptance angles than the telescopic versions, e.g. for fibre op ...
Tutorial: Are You Safe at a Laser Light Show?
Tutorial: Are You Safe at a Laser Light Show?

... meter detector. The peak hold detector of the BC20 is able to register pulses as short as 10us, thus making the device suitable for directly measuring the peak power present in the majority of scanned laser show emissions. Once the peak power present in the emission at the point of accessible contac ...
Exposure and Imaging
Exposure and Imaging

... – The best lenses used in projection lithography have NA = 0.3 - 0.4 – A lens with NA = 0.50 is a f/1.00 lens: its focal length and effective diameter are the same! – The largest NA lenses ever made were a NA = 0.54 and a NA = 0.60 by Nikon. ...
RIT - People - Rochester Institute of Technology
RIT - People - Rochester Institute of Technology

... In fully incoherent imaging, the diffraction orders have a spread that causes them to fill the entire pupil. This results in an imaging condition where the minimum resolvable pitch is smaller than that possible using ...
PHYS 1111 Mechanics, Waves, & Thermodynamics
PHYS 1111 Mechanics, Waves, & Thermodynamics

... refract at different angles when passing through a lens (for the same paraxial ray) The rays focus at different locations for each  Not a problem for monochromatic light beams For ordinary (polychromatic) light, chromatic aberration can be reduced by - choose materials with minimal  dependence of ...
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Exposure value

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