1,977 terms
Photonics Dictionary
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octaveIn optics, an octave typically refers to a range of frequencies or wavelengths that spans a factor of 2. In other words, when dealing with optics, an octave encompasses a doubling of frequency or...
ocular -> eyepieceAlso known as ocular. The lens system used between the final real image in a visual optical system and eye. It acts as an image magnifier. Many types of eyepieces are known; e.g., the Huygens used in...
ocular accommodationOcular accommodation is the process by which the eye changes its optical power to maintain a clear image (focus) on an object as its distance varies. This process is essential for seeing objects at...
oculometerAn electro-optical infrared tracker consisting of a beamsplitter, an illuminating source, an image dissector tube and an electronics unit, that automatically acquires and tracks particular eye...
OCVoptical character verification
OCWRoptical continuous wave reflectometer
ODoptical density; outside diameter
ODMoptical disc memory
ODNoptical distribution network
ODPoptical data processing
ODSoptical data storage
OESoptical emission spectroscopy
OFDRoptical frequency domain reflectometer
off-axis paraboloid and ellipsoid mirrorOff-axis paraboloid and ellipsoid mirrors are specialized optical components used in various optical systems, particularly in applications requiring precise focusing, collimation, or imaging of...
off-axis paraboloidal mirror -> paraboloidal mirrorA concave mirror that has the form of a paraboloid of revolution. The paraboloidal mirror may have only a portion of a paraboloidal surface through which the axis does not pass, and is known as an...
offset prismA prism or prism assembly that serves to displace the instrument's optical axis.
OFToptical fiber thermometry
OIGoptically isolated gate
OISLoptical intersatellite link
OLToptical lay-up template; optical line terminator
OLTSoptical loss test set
OMoptical master
OMAoptical multichannel analyzer
OMDoptical modulation depth
OMRoptical mark reader
OMUoptical measuring unit
ONIoptical network interface
ONNoptical neural network
ONUoptical network unit
OOIopen optical interface
OPADECoptical particle decoy
OPALoptical access line
OPCoptical phase conjugation
OPDoptical path difference
OPDARoptical detection and ranging
open optical interfaceAn interface in an optical network that permits an optical signal to pass without changing the optical signal to an electrical signal and therefore does not limit the signal to a specific protocol.
ophthalmologyOphthalmology is a branch of medicine that focuses on the anatomy, physiology, and diseases of the eyes and visual system. Ophthalmologists are medical doctors who specialize in the diagnosis,...
ophthalmoscopeAlso referred to as a funduscope, an ophthalmoscope is a specialized instrument used by ophthalmologists for observing and photographing the fundus (interior) of the eye which includes the retina,...
ophthalmoscopyAlso referred to as fundus photography, ophthalmoscopy is the dioptrical study of the various interior components of the eye such as the macula, fovea, and opticdisk, and is overall essential in...
OPMoptical performance monitor
OPOoptical parametric oscillator
OPRoptical page reader; optical pattern recognition
OPSoptical power spectrum
optic lobeThe optic lobe refers to a specific part of the brain found in vertebrates and some invertebrates, particularly in the visual systems of these organisms. In vertebrates, including humans, the optic...
opticalPertaining to optics and the phenomena of light.
optical aberration -> optical aberrationOptical aberration refers to imperfections or deviations from ideal optical behavior in an imaging system, such as a lens or a mirror. These aberrations can cause distortions, blurring, or other...
optical aberrationOptical aberration refers to imperfections or deviations from ideal optical behavior in an imaging system, such as a lens or a mirror. These aberrations can cause distortions, blurring, or other...
optical accumulatorAn optical accumulator is a concept or device that collects and stores optical energy or data for subsequent use. This can be applied in various fields within optics and photonics:
Optical data...
optical activityThe capacity of a chiral substance such as a crystal or molecule to rotate the plane of polarized light that is transmitted through it. Any substance that cannot be superimposed onto it's mirror...
optical air massA measure of the optical path length for light traveling from the sun or other celestial source through Earth's atmosphere to sea-level relative to the optical path length traveled by light from the...
Photonics Dictionary