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An OTDR. An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber.It is the optical equivalent of an electronic time domain reflectometer which measures the impedance of the cable or transmission line under test.
It employs geometric ray tracing, a technique for modeling the propagation of light through an optical system by assuming that wavelength of light is much smaller than the components in the system and thus that the light can be treated as pencil-thin rays. Ansys Zemax OpticStudio can perform sequential and non-sequential ray tracing.
This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.
thejns.org: High-definition fiber tracking for assessment of neurological deficit in a case of traumatic brain injury: finding, visualizing, and interpreting small sites of damage Case report (2012-04-30) upmc.com: New High Definition Fiber Tracking Reveals Damage Caused by Traumatic Brain Injury, Pitt Team Reports (2012-03-02)
Ray-Tracing engine has been switched from OpenCL to GLSL implementation. Open CASCADE Technology 6.7 2013-12-18 6.7.1 2014-04-30 License changed to LGPL-2.1-only with added exception. [3] Built-in GPU-accelerated Ray-Tracing rendering engine [9] using OpenCL. Open CASCADE Technology 6.6 2013-04-22 — — Open CASCADE Technology 6.5 2011-04-04 ...
Diagram showing vectors used to define the BRDF. All vectors are unit length. points toward the light source. points toward the viewer (camera). is the surface normal.. The bidirectional reflectance distribution function (BRDF), symbol (,), is a function of four real variables that defines how light from a source is reflected off an opaque surface. It is employed in the optics of real-world ...
A Seifert fiber space is a 3-manifold together with a decomposition as a disjoint union of circles. In other words, it is a S 1 {\displaystyle S^{1}} -bundle ( circle bundle ) over a 2-dimensional orbifold .
MTR is licensed under the terms of the GNU General Public License (GPL) and works under modern Unix-like operating systems. It normally works under the text console, but it also has an optional GTK+-based graphical user interface (GUI).