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The slotted optical switch, sometimes known as opto switch or optical switch but not to be confused with the optical component, is a device comprising a photoemitter (e.g. LED) and a photodetector (e.g. photodiode) mounted in a single package so that the photoemitter normally illuminates the photodetector, but an opaque object can be inserted in a slot between them so as to break the beam.
CDemu is a free and open-source virtual drive software, designed to emulate an optical drive and optical disc (including CD-ROMs and DVD-ROMs) on the Linux operating system.. As of 30 June 2019, CDemu is not available in the official repositories of Debian, Ubuntu and Fedora Linux for any release, but it is available via official PPA for Ubuntu and COPR for Fedora Linux.
Tesseract is an optical character recognition engine for various operating systems. [5] It is free software, released under the Apache License. [1] [6] [7] Originally developed by Hewlett-Packard as proprietary software in the 1980s, it was released as open source in 2005 and development was sponsored by Google in 2006.
Photopia Optical Design Software: Proprietary: Yes No No No Picogen: GPLv3 Yes No Yes No Pixar RenderMan: Proprietary: Yes Yes Yes No Pixie GPL: Yes Yes Yes No POV-Ray: AGPLv3: Yes Yes Yes Quadoa Optical CAD: Proprietary: Yes No Yes No Rayshade: pre-gpl open source, gpl-like Yes Yes Yes Yes Radiance: BSD: Yes Yes Yes No Realsoft 3D: Proprietary ...
open source Yes Yes Yes Yes Yes manual, or can import other mesh formats FEM: General purpose, includes 2D and 3D magnetics solvers, both static and harmonic. 3D solver is based on the Whitney AV formulation of Maxwell's equations. VSimEM: Commercial Yes Yes Yes Yes Yes Automatic, variable mesh FDTD, PIC, finite volume
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This comparison of optical character recognition software includes: OCR engines, that do the actual character identification; Layout analysis software, that divide scanned documents into zones suitable for OCR; Graphical interfaces to one or more OCR engines
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