Results 21 to 30 of about 54,811 (238)

Modulation Transfer Function Analysis in Myopic Model Eye

open access: yesASM Science Journal, 2021
Hitherto, the eye modelling is based on the emmetropic eye taken its ocular optical components value from the population-based studies. However, no studies have been done to study the effect of aberration of myopic refractive error by modelling the eye ...
Shah Farez Othman   +3 more
doaj   +1 more source

Automatic Estimation of Modulation Transfer Functions

open access: yes, 2018
The modulation transfer function (MTF) is widely used to characterise the performance of optical systems. Measuring it is costly and it is thus rarely available for a given lens specimen.
Bauer, Matthias   +3 more
core   +1 more source

Dynamic MTF measurement [PDF]

open access: yesInternational Conference on Space Optics — ICSO 2010, 2017
MTF (Modulation Transfer Frequency) of a detector is a key parameter for imagers. When image is not moving on the detector, MTF can be measured by some methods (knife edge, slanted slit,…). But with LEO satellites, image is moving on the surface of the detector, and MTF has to be measured in the same way: that is what we call "dynamic MTF".
Frederic Seve   +3 more
openaire   +1 more source

Electro-Optical Design of Imaging Payload for a Remote Sensing Satellite [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2010
Remote sensing using small spacecraft arising from multi-objective economic activity problems is getting more and more developed. These satellites require very accurate pointing to specific locations of interest, with high reliability and small latency ...
E Peighani-Asl   +3 more
doaj  

Satellite Operation Design for Assessing MTF Performance of Earth Observation Satellite Using Stellar Sources [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2007
Modulation Transfer Function (MTF) of satellite image is an important performance index in satellite image applications. Therefore MTF performance is assessed using satellite image for the ground target during LEOP phase after launch.
Hee Seob Kim   +2 more
doaj   +1 more source

Imaging performance of a CaWO4/CMOS sensor

open access: yesFracture and Structural Integrity, 2019
The aim of this study was to investigate the modulation transfer function (MTF) and the effective gain transfer function (eGTF) of a non-destruc¬¬tive testing (NDT)/industrial inspection complementary metal oxide semi¬conductor (CMOS) sensor in ...
Niki Martini   +11 more
doaj   +1 more source

Retrospective analysis of restoration of the anatomy of the damaged thoracic and lumbar spinal motion segment using transpedicular repositioning device

open access: yesХирургия позвоночника, 2022
Objective. To carry out a retrospective analysis of the restoration of the anterior and posterior vertebral body heights and the elimination of deformation of the anterior spinal canal wall caused by thoracic and lumbar spine injury, based on the data of
Vladimir D. Usikov   +2 more
doaj   +1 more source

Determining the optimal choice of attenuation filters and propagation distance for polychromatic phase-contrast micro-computed tomography of a multi-material electromotor using synchrotron radiation

open access: yesJournal of Synchrotron Radiation
Optimizing phase-contrast micro-computed tomography (µCT) for a given object is not trivial if the radiation is polychromatic and the object multi-material.
Matthias Diez, Simon Zabler
doaj   +1 more source

A quality assurance phantom for electronic portal imaging devices [PDF]

open access: yes, 2011
Electronic portal imaging device (EPID) plays an important role in radiation therapy portal imaging, geometric and dosimetric verification. Consistent image quality and stable radiation response is necessary for proper utilization that requires routine ...
Cao, Minsong   +6 more
core   +1 more source

The Impact of the 2009 Federal Tobacco Excise Tax Increase on Youth Tobacco Use [PDF]

open access: yes, 2012
Based on surveys of eighth-, tenth-, and twelfth-grade students, examines how the tobacco tax increase affected their use of cigarettes and other tobacco products.
Frank J. Chaloupka, IV, Jidong Huang
core   +1 more source

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