Searches , social queries for OPTICAL FEEDBACK
Search references for OPTICAL FEEDBACK. Phrases containing OPTICAL FEEDBACK
See searches and references containing OPTICAL FEEDBACK!
Search references for OPTICAL FEEDBACK. Phrases containing OPTICAL FEEDBACK
See searches and references containing OPTICAL FEEDBACK!OPTICAL FEEDBACK
Loop delay that occurs when a video camera is pointed at its own playback video monitor
a fractal pattern. Optical feedback in science is often closely related to video feedback, so an understanding of video feedback can be useful for other
Video_feedback
Optical phenomenon
Optical feedback (OF) is an optical phenomenon that involves a part of the coherent emission light from a laser returns to the laser cavity. The effect
Optical_feedback
Process where information about current status is used to influence future status
Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause and effect that forms a circuit or loop. The system can
Feedback
Device that amplifies an optical signal
laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and
Optical_amplifier
Feedback between climate change and the effect of clouds on radiation
conditions but omitting the optical effects of clouds. Cloud feedback is one of a number of climate feedbacks. Cloud feedback sums up the influence of all
Cloud_feedback
Type of laser diode
A distributed-feedback laser (DFB) is a type of laser diode, quantum-cascade laser or optical-fiber laser where the active region of the device contains
Distributed-feedback_laser
Laser fundamental design principles
diode. The optical resonator, or optical cavity, in its simplest form is two parallel mirrors placed around the gain medium, which provide feedback of the
Laser_construction
Device that emits light via optical amplification
a mechanism to energize the gain medium, and something to provide optical feedback. The gain medium is a material with properties that allow it to amplify
Laser
Arrangement of mirrors
resonator confines microwaves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser light. They
Optical_cavity
Laser whose optical feedback occurs from scattering
laser in which optical feedback is provided by scattering particles. As in conventional lasers, a gain medium is required for optical amplification. However
Random_laser
Laser using an optical fiber as the active gain medium
mirrors to provide optical feedback. They may also be designed for single longitudinal mode operation of ultra-narrow distributed feedback lasers (DFB) where
Fiber_laser
Microscopy technique
near-field optical (NFO) microscope involved a sub-wavelength aperture at the apex of a metal coated sharply pointed transparent tip, and a feedback mechanism
Near-field scanning optical microscope
Near-field_scanning_optical_microscope
Optoelectronics component
SLEDs lack optical feedback, so that no laser action can occur. Optical feedback resulting from back-reflections of light from optical components such
Superluminescent_diode
Press, 2009). Wiseman, H.; Milburn, G. J. (1993). "Quantum theory of optical feedback via homodyne detection" (PDF). Phys. Rev. Lett. 70 (5): 548–551. Bibcode:1993PhRvL
Quantum_feedback
Cycles going through a hierarchy
travelPages displaying short descriptions of redirect targets Optical feedback – Optical phenomenon Ouroboros – Symbolic serpent with its tail in its mouth
Strange_loop
Laser that uses surface plasmon polaritons
exploiting hybrid quadrupole plasmons as an optical feedback mechanism. The spaser is a proposed nanoscale source of optical fields that is being investigated in
Spaser
Vacuum tube device for increasing the intensity of available light
alternative to the cascade tube explored in the mid 20th century involves optical feedback, with the output of the tube fed back into the input. This scheme has
Image_intensifier
Technique for measuring chemical composition of a gas
Cavity-Enhanced Optical-Heterodyne Molecular Spectroscopy (NICE-OHMS) technique. or combination of frequency modulation and optical feedback locking CEAS
Tunable diode laser absorption spectroscopy
Tunable_diode_laser_absorption_spectroscopy
Optical instrument
used. A QCL however does not use bulk semiconductor materials in its optically active region. Instead, it consists of a periodic series of thin layers
Quantum-cascade_laser
Optical component allowing the transmission of light in only one direction
used to prevent unwanted feedback into an optical oscillator, such as a laser cavity. The operation of conventional optical isolators relies on the Faraday
Optical_isolator
Type of light that can be emitted by an optical amplifier
gain medium is pumped to produce a population inversion. Feedback of the ASE by the laser's optical cavity may produce laser operation if the lasing threshold
Amplified spontaneous emission
Amplified_spontaneous_emission
Sub-field of computer graphics
elements. Bounding interval hierarchy Demoscene Geometry instancing Optical feedback Quartz Composer Real time (media) Real-time raytracing Tessellation
Real-time_computer_graphics
by optical or electronic feedback. Optical feedback (OF) locking, originally developed by Romanini et al. for cw-CRDS, uses the optical feedback from
Laser_absorption_spectrometry
Optical techniques for the study of biology
Biolasers, like any lasers, require three components: a gain medium, an optical feedback structure and a pump source. For the gain medium, a variety of naturally
Biophotonics
onto the array itself at the Talbot distance, creating optical feedback. This interference feedback forces the lasers in the array to transverse mode lock
Talbot_cavity
Semiconductor material
semiconductor material in which a p-n junction forms the active medium and optical feedback is typically provided by reflections at the device facets. AlGaInP
Aluminium gallium indium phosphide
Aluminium_gallium_indium_phosphide
Topics referred to by the same term
systems Video feedback, the optical equivalent of audio feedback, caused when a camera films the image it is producing Positive feedback, a feedback system that
Feedback_(disambiguation)
Physicist
(2011), Laser Cleaning II (2007), and Unlocking Dynamic Diversity: Optical Feedback Effects on Semiconductor Lasers (2005). Physics, Director Research
Deborah_M_Kane
with less physical feedback. Optical fingerprint sensor Wikimedia Commons has media related to Optical trackpads. "RIM's optical trackpads: they weren't
Optical_trackpad
Art form using video technology
List of video artists Music video Music visualization New media art Optical feedback Real-time computer graphics Scratch video Single-channel video Sound
Video_art
Control system for the motion of a mechanical system
automatic feedback that controls position—the operator does this by observation. By contrast a car's cruise control uses closed-loop feedback, which classifies
Servomechanism
transmissions states are possible and stable, dependent on the input. Optical devices with a feedback mechanism, e.g. a laser, provide two methods of achieving bistability
Optical_bistability
Japanese engineer and physicist
picosecond pulse generation in semiconductor lasers with incoherent optical feedback," Optics Letters vol. 16, 1759–1761 (1991). K. Otsuka, "Nonlinear antiresonant
Kenju_Otsuka
Capturing of human-marked data from document forms
Optical mark recognition (OMR) collects data from people by identifying markings on a paper. OMR enables the hourly processing of hundreds or even thousands
Optical_mark_recognition
Israeli-Swiss engineering company
(PhD). University of Oxford. Bergin, Ann G.V. (2013). Applications of optical-feedback cavity-enhanced absorption spectroscopy (PhD). University of Oxford
Alpes_Lasers
"Piezo-electrically tuned optical resonator and laser using same." US Patent 5,757,831, "Electronic suppression of optical feedback instabilities in a solid-state
Lightwave Electronics Corporation
Lightwave_Electronics_Corporation
Phenomenon where corals expel algae tissue
Pratchett, Morgan; Ziegler, Maren; Wiedenmann, Jörg (July 2020). "Optical Feedback Loop Involving Dinoflagellate Symbiont and Scleractinian Host Drives
Coral_bleaching
coherence tomography Optical cross section Optical decay Optical dilatometer Optical disc drive Optical downconverter Optical feedback Optical heterodyne detection
List_of_laser_articles
Optical rogue waves are rare pulses of light analogous to rogue or freak ocean waves. The term optical rogue waves was coined to describe rare pulses of
Optical_rogue_waves
Transmitting information over optical fiber
of optical communication for transmitting information from one place to another by sending pulses of infrared or visible light through an optical fiber
Fiber-optic_communication
Type of motor
servomechanism, and consists of a motor coupled to a sensor (for position feedback) and a controller (often a dedicated module designed for servomotors).
Servomotor
Filipino academic (born 1960)
Optics & Photonics News (Optical Society of America), p. 30 (December 2006). P J Rodrigo, M Lim and C Saloma, "Optical-feedback semiconductor laser Michelson
Caesar_Saloma
Laser source with equal intervals of spectral lines
the accuracy of such clocks into the optical part of the electromagnetic spectrum. A simple electronic feedback loop can lock the repetition rate to a
Frequency_comb
Imaging technique
Optical coherence tomography (OCT) is a high-resolution imaging technique with most of its applications in medicine and biology. OCT uses coherent near-infrared
Optical_coherence_tomography
Small arms telescopic sight
The C79 optical sight (SpecterOS3.4×) is a telescopic sight manufactured by Elcan. A variant, the M145 Machine Gun Optic is in use by the US military
C79_optical_sight
Clock that monitors the resonant frequency of atoms
Toscani De Col, Luca; et al. (3 June 2026). "A thorium-229 optical nuclear clock with feedback loop". arXiv:2606.04997 [physics.atom-ph]. Huang, Beichen;
Atomic_clock
American physicist and engineer
of optical components, including filters and couplers to integrated optical devices. His innovation was the beginning of the "distributed feedback laser
Herwig_Kogelnik
Hardware technology of keyboards
interface, have no physical switches and provide artificial audio and haptic feedback instead. This variety of keyboard can prove useful, as it is not limited
Keyboard_technology
Type of very-high-resolution microscopy
order of fractions of a nanometer, more than 1,000 times better than the optical diffraction limit. Atomic force microscopy (AFM) gathers information by
Atomic_force_microscopy
Microchip manipulating light instead of electricity
A photonic integrated circuit (PIC) or integrated optical circuit is a microchip containing two or more photonic components that form a functioning circuit
Photonic_integrated_circuit
Amplifier that converts current to voltage
(Fig. 1), a transimpedance amplifier is just an opamp with a large-valued feedback resistor, Rf. This resistor sets the amplifier's transimpedance (i.e. its
Transimpedance_amplifier
Metal oxide powder production method
behavior. The small particle size of the rare earth metals provide optical feedback. YAG has been studied because of their high temperature mechanical
Liquid-feed flame spray pyrolysis
Liquid-feed_flame_spray_pyrolysis
Process of recording the movement of objects or people
into its headquarters. Namco's 1995 arcade game Soul Edge used passive optical system markers for motion capture. Motion capture also uses athletes in
Motion_capture
Apollo spacecraft guidance system
angles to signals usable for servo control optical units, a Space Sextant for the CM and an Alignment Optical Telescope for the LM a mechanical frame, called
Apollo_PGNCS
Digital video game controllers
steering wheels. Several types of joysticks were made, including the Force Feedback 2, the 3D Pro, and the regular SideWinder joystick. Also, several types
Microsoft_SideWinder
Measurement of oven temperatures
circuits" Kapusta, Evelyn (2005), Using Thermal Profiling to Monitor Optical Feedback in Semiconductor Lasers (Thesis) K. Gill, M. Appleton and G. J. Lye
Thermal_profiling
regular surface such as sphere or a cylinder), or by an automatic optical feedback system (i.e. a camera can be used to evaluate the alignment of test
Image_geometry_correction
Device used to reduce the power level of an optical signal
optical attenuator, or fiber optic attenuator, is a device used to reduce the power level of an optical signal, either in free space or in an optical
Optical_attenuator
mechanical quantities such as surface structure and orientation. Optical sensors are used in a feedback loop as part of control systems for mechatronic devices
Optomechatronics
"Experimental investigation of solitary structures in a nonlinear optical feedback system". Optics Communications. 136 (5–6). Elsevier BV: 415–418. Bibcode:1997OptCo
Dissipative_soliton
Climatic effect causing a planet's atmosphere to trap heat and prevent cooling
temperatures evaporating water into the atmosphere, increasing its optical depth. This positive feedback loop means the planet cannot cool down through longwave
Runaway_greenhouse_effect
Optical instrument for non-contact measurement of angles
is an optical instrument for non-contact measurement of angles. They are typically used to align components and measure deflections in optical or mechanical
Autocollimator
Ratio of how much light is reflected back from a body
feedbacks: increased by "self-reinforcing" or "positive" feedbacks and reduced by "balancing" or "negative" feedbacks. The main reinforcing feedbacks
Albedo
downconverter Optical equivalence theorem Optical feedback Optical field Optical flat Optical force Optical format Optical lattice Optical lens design Optical levitation
Index_of_physics_articles_(O)
Electronic component
An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between
Opto-isolator
Sensor that uses optical fiber
A fiber-optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a
Fiber-optic_sensor
British semiconductor laser physicist
distributed-feedback laser modelling. In 1992 he received the J. J. Thomson Medal for Electronics for his work on semiconductor lasers and optical devices
George_Horace_Brooke_Thompson
sensing of the ball's movement uses optical encoders connected to rollers, that touch the ball. The Marble Optical Technology uses 1 or 2 red LEDs to shine
List_of_Logitech_products
Method of providing feedback to voters
trail (VVPAT) or verified paper record (VPR) is a method of providing feedback to voters who use an electronic voting system. A VVPAT allows voters to
Voter-verified paper audit trail
Voter-verified_paper_audit_trail
Classification of Artificial Neural Networks (ANNs)
without additional parameters. A regulatory feedback network makes inferences using negative feedback. The feedback is used to find the optimal activation
Types of artificial neural networks
Types_of_artificial_neural_networks
Semiconductor laser
characterized by an optical cavity consisting of an electrically or optically pumped gain region between two mirrors to provide feedback. One of the mirrors
Laser_diode
Optical point-to-point Free Space Optics data link
RONJA (Reasonable Optical Near Joint Access) is a free-space optical communication system developed in the Czech Republic by Karel Kulhavý of Twibright
RONJA
Type of electronic circuit
connected in a feedback loop with its output fed back into its input through a frequency selective electronic filter to provide positive feedback. When the
Electronic_oscillator
Lithography using 13.5 nm UV light
optical proximity correction (OPC), including the assist features mentioned above, may also be applied to address the aberrations, they also feedback
EUV_lithography
Captures vibrations produced by musical instruments
filter, producing a non-linearity effect not found in piezoelectric or optical transducers. Pickups are usually designed to feed a high input impedance
Pickup_(music_technology)
Dutch-born American physicist
Leiden University. He served as the President of Optica (formerly the Optical Society) in 2017. Mazur studied physics and astronomy at Leiden University
Eric_Mazur
Pointing device used to control a computer
detect motion, in turn connected to internal rollers. Most modern mice use optical movement detection with no moving parts. Though originally all mice were
Computer_mouse
Astronomical telescope at Roque de los Muchachos Observatory
The Nordic Optical Telescope (NOT) is an astronomical telescope located at Roque de los Muchachos Observatory, La Palma in the Canary Islands. The telescope
Nordic_Optical_Telescope
Device for producing coherent EM waves in the sub-visible spectrum
Theodore Maiman. When the coherent optical oscillator was first imagined in 1957, it was originally called the "optical maser". This was ultimately changed
Maser
Branch of microscopy
Gerd Binnig and Heinrich Rohrer. The key to their success was using a feedback loop to regulate gap distance between the sample and the probe. Many scanning
Scanning_probe_microscopy
Field of physics relating to optics and quantum mechanics)
Physics for his pioneering work on trapping with optical tweezers. Instead of applying a linear feedback signal, one can also combine position and velocity
Levitated_optomechanics
Software component
facilitate typing numbers. Optically projected keyboard layouts or similar arrangements of "keys" or sensing areas Optically detected human hand and finger
Virtual_keyboard
Laser that uses a carbon-based material as the gain medium
Dennis (2000-06-20). "Distributed-feedback dye-doped solgel silica lasers". Applied Optics. 39 (18). The Optical Society: 3104–3107. Bibcode:2000ApOpt
Organic_laser
Atomic-scale structure formed through the Stark shift by opposing beams of light
of the laser power into the optical lattice. Active power stabilization of the lattice laser can be accomplished by feedback of a photodiode signal to the
Optical_lattice
Study of light interaction with water and submerged materials
satellites. The vast majority of the world's oceans by area are optically deep. Optically deep water can still be relatively shallow water in terms of total
Ocean_optics
Type of variable active electronic filter
classified as Multiple Feedback (MFB) and Multi Feedback Loop (MFL) Filters because of the typical feedback configurations. The multiple feedback architecture contributes
State_variable_filter
Noise-immune cavity-enhanced optical-heterodyne molecular spectroscopy (NICE-OHMS) is an ultra-sensitive laser-based absorption technique that utilizes
Noise-immune cavity-enhanced optical heterodyne molecular spectroscopy
Noise-immune_cavity-enhanced_optical_heterodyne_molecular_spectroscopy
Electromechanical device
wear. They are common in human interfaces such as digital multimeters. Optical: This uses a light shining onto a photodiode through slits in a disc, commonly
Rotary_encoder
German family of precision-guided glide bombs
Diameter: Approx 40 cm (16 in) Guidance: GPS/INS and electro-optical (EO) video feedback Eurofighter Typhoon Panavia Tornado Taurus missile – (Sweden
HOPE/HOSBO
Image shown by a computer program while loading or initializing
purpose is to inform users that their system is still working and to provide feedback during delay. Loading screens may display animated graphics, rotating symbols
Loading_screen
Camera model
camera has a 12× optical zoom Leica lens and OIS (optical image stabilization). The optical zoom can be increased to 19.1× optical zoom by decreasing
Panasonic_Lumix_DMC-FZ30
Electronic amplifier that varies its gain depending on a control input
inverting op-amp configuration with a light-dependent resistor (LDR) in the feedback loop. The gain of the amplifier then depends on the light falling on the
Variable-gain_amplifier
American physicist (born 1943)
technologies, and laser communications, and is the co-inventor of the distributed feedback laser. He studied the femtochemistry of rhodopsin, a photosensitive pigment
Charles_V._Shank
Failure mode of semiconductor lasers
thermal runaway, a form of positive feedback, and the result can be melting of the facet, known as catastrophic optical damage, or COD. Deterioration of
Catastrophic_optical_damage
North American networking equipment company
including packet optical networking, based on customer feedback. Optelian now designs and develops optical transport network components for over 200 service
Optelian
Proposed space observatory to characterize exoplanets' atmospheres
may be and determine the range of their characteristics. It would be an optical, UV and infrared telescope that would also use spectrographs to study planetary
Habitable Exoplanets Observatory
Habitable_Exoplanets_Observatory
Standards for Ethernet at ten times the speed of Gigabit Ethernet
pluggable formats on either end (e.g., XPAK and SFP+) as long as the 10GbE optical or copper port type (e.g. 10GBASE-SR) supported by the pluggable is identical
10_Gigabit_Ethernet
Israeli-American professor
on optical electronics and photonics. He has said that the highlight of his group's work was the invention of the semiconductor distributed feedback laser
Amnon_Yariv
that occurs within a single mode optical fiber. This dispersion mechanism is a result of material properties of optical fiber and applies to both single-mode
Intramodal_dispersion
Term in optics
In optics, the term soliton is used to refer to any optical field that does not change during propagation because of a delicate balance between nonlinear
Soliton_(optics)
travel, tourism, insurance
OPTICAL FEEDBACK
OPTICAL FEEDBACK
OPTICAL FEEDBACK
OPTICAL FEEDBACK
OPTICAL FEEDBACK
OPTICAL FEEDBACK
OPTICAL FEEDBACK
OPTICAL FEEDBACK
OPTICAL FEEDBACK
travel, tourism, insurance