instruments.owl This ontology covers classes and properties of instruments that are commonly used by astronomers. It includes terms from the IVOA Thesaurus plus terms frGom the UMD astronomical ontology Ed Shaya aberration absorption spectroscopy active optics adaptive optics airplane-borne instrument airplane borne instrument Airy disk alignment optics all-sky camera all sky camera all-sky photography all sky photography altazimuth mounting azimuth mounting alt-azimuth mounting altimeter altimetry altitude angle elevation angle aluminizing aluminum coating amplifier analog recorder anemometer angular resolution antarctic observatory antenna aerials antennas antenna design antireflection coating aperture aperture synthesis synthetic aperture apodization apodisation UK armillary sphere array artificial satellite astigmatism astrograph astrographic camera astrolabe astrometric instrument astronomical optics atomic clock cesium clock caesium clock attenuation autoguider automated telescope robotic telescope automatic patrol telescope auxiliary instrument avalanche photodiode Baker-Nunn camera balloon-borne instrument balloon borne instrument barometer beam switching beam waveguide beamwidth Bessel photometry Bessel UBVRI photometry bias calibration blink comparator bolometer Bouwers telescope calibration camera camera lens Cape photometry UCBV photometry Cape RI photometry Cassegrain antenna Cassegrain antennas two reflector antennas two-reflector antennas Cassegrain focus Cassegrain telescope catadioptric system cathode catoptric system CCD detector CCD camera CCD observation CCD photometry Cerenkov counter Cherenkov counter charge-coupled device charge coupled device CCD charge-injection device CID charge injection device charge-transfer device CCD charge transfer device chromatic aberration clean method clock cloud monitor coelostat collimation collimator colorimetry color photography coma comatic aberration coma comparison lamp control system coronagraph corrector plate Coude focus Coude spectrograph Coude spectrum counter count cryogenics cryostat Danjon astrolabe dark-current calibration darkroom data acquisition DDO photometry dead-time calibration densitometer densitometry detector detector array dichroic mirror Dicke radiometer differential image motion monitor DIMM diffraction grating grating digital image digital recorder diode diode array dioptric system dipole antenna dipole antennas directional antenna directional antennas dish antenna dish antennas dome telescope dome dome seeing drift scan drive dust detector echelle grating echelons echelle spectrograph echelle spectrometer echelle spectrum electrode electronic camera electronic equipment electronics electronographic camera electrographic camera English mounting equatorial mounting eyepiece Fabry-Perot interferometer Fabry Perot interferometer Fabry-Perot spectrograph Fabry Perot spectrograph Fabry Perot spectrometer Fabry-Perot spectrometer false color photography feed feed horn fiber optics field corrector correcting lens field curvature curvature of field field of view figuring filter wheel finding chart flat field flat field lamp flattening flexure focal reducer focus fork mounting Fourier spectrograph Fourier spectrometer Fourier transform spectroscopy gamma-ray observatory gamma ray observatory gamma-ray spectrograph gamma ray spectrograph gamma-ray spectroscopy gamma-ray telescope Geneva photometry ubvgri photometry geophysical observatory geostationary satellite German mounting global positioning system GPS grating response grating ring grating spectrograph gravimetry grazing incidence grazing incidence spectrograph grazing incidence telescope Gregorian telescope grism guide system Gunn diode Gunn photometry Gunn g,r,i,z photometry half-wave plate half wave plate halfwave plate H alpha photometry Hartmann test H beta photometry heliograph heliometer heliostat heterodyne high-resolution spectrosopy high dispersion spectroscopy high resolution spectrosopy high-dispersion spectroscopy high-resolution spectrum high dispersion spectrum high resolution spectrum high-dispersion spectrum high-speed photometer high speed photometer horn antenna horn antennas horseshoe mounting HST photometry HST Fnnn[LMNW] photometry Hubble photometry Hubble Space Telescope HST image image tube photoelectric image tube image converters light amplifier image intensifier imaging instrument impersonal astrolabe inertial reference frame infrared detector infrared observatory infrared telescope instrument instrumentation astronomical instrument instrumental profile integral field spectrograph integration time intensity interferometer interference filter interference fringe fringe patterns fringe interference spectrosocopy interferometer interferometric correlation iodine cell IRAS satellite IRAS Johnson noise Johnson photometry UBVRIJKL photometry Johnson-Morgan filter system UBV photometry three-color photometry UBVRI photometry Kellner eyepiece Kron-Cousins photometry Kron Cousins photometry Kron-Cousins R,I photometry lamp laser laser ranging lens lens antenna lens antennas lens design linearity calibration long baseline interferometer long baseline interferometry long slit long slit spectrum magnetograph magnetoheliograph magneto-optical effect magneto optical effect Maksutov telescope measuring instrument mechanical component meridian circle meteor camera metrology Michelson interferometer Michelson interferometry microchannel plate microdensitometer microdensitometry micrometer microphotometer microwave antenna microwave antennas microwave imaging microwave spectroscopy Mills cross antenna Mills cross antennas mirror mirror cell modulation transfer function MTF monochromator multi-channel detector multichannel detector multi-channel spectrograph multi-channel spectrometer multichannel spectrograph multi-fiber spectrograph multiple mirror telescope MMT multi-slit spectrograph Nasmyth focus neutral density filter Newtonian focus Newtonian telescope objective objective grating objective prism oblateness observation observatory occulting disk optical aberration aberration optical component optical design optical fiber glass fiber optical film film [optical] optical filter color filter optical glass optical instrument optical equipment optical interferometer stellar interferometer optical interferometry light interferometry stellar interferometry optical material optical observation optical observatory optical radar optical scanners optical spectrograph optical spectrometer optical spectroscopy optical surface optical system optical telescope optical testing optical transfer function OTF optical transmission window optical waveguide optical window optics orrery orthoscopic eyepiece parabolic antenna parabolic antennas parabolic mirror parabolic reflector parametric amplifier pendulum phased array phase sensitive detector phase switching phase switching interferometer phosphorescent scintillation photocathode photoconductive cell photodiode photoelectric instrument photoelectric photometer photoelectric photometry photoelectronic device photogrammetry photograph photographic astrometry photographic developer photographic emulsion photographic film film [photographic] photographic filter photographic instrument photographic material photographic photometry photographic plate photographic processing photography photoheliograph photometer photometric element photometric system photomultiplier tube photocell photoelectric cell photon counting system photovoltaic cell point spread function PSF polarimeter polishing position sensitive proportional counter PSPC preamplifier primary lens primary mirror prime focus prism prism spectrograph proportional counter pulse counter pulse counting quadrant quadrant detector quantum efficiency Q.E. QE quarter wave plate radar radar equipment radar mapping radar telescope radio antenna radio antennas radioheliograph radio interference radio frequency interference radio noise radio interferometer radiometer radiometry radio observatory radio spectrograph radio spectrometer radio spectroscopy radio telescope radio transmission window radio waveguide Ramsden eyepiece range finder read out noise RON reflecting telescope reflector reflection grating reflector antenna reflector antennas refracting telescope remote control system remote sensing resolution reticle reticon array rgb photometry red-green-blue photometry rgu photometry Ritchey-Chretien telescope RC rocket-borne instrument rocket borne instrument satellite satellite-borne instrument satellite borne instrument satellite laser ranging Schmidt camera Schmidt telescope scintillation counter secondary mirror seeing seeing monitor segmented optics self-calibration method self calibration method semiconductor device sensitivity sensitometer sextant shaped reflector shot noise shutter sidelobe lobe [telescope beam] siderostat silver coating site protection site testing slit mask Sloan photometry SDSS photometry solar observatory solar optical telescope solar radio telescope solar telescope tower telescope space astrometry space observatory orbiting observatory space probe instrument space telescope space vehicle speckle speckle interferometry spectral band spectral resolution spectrograph spectrograph slit slit spectrography spectrophotography spectroheliograph spectrophotometer spherical aberration streak photography stroboscope Stromgren photometry Stromgren uvby system uvby system four-color photometry subreflector superconducting tunnel junction synchronous detector t array telescope telescope array telescope construction telescope design telescope instrument telescope instrumentation telescope mirror telescope mounting television TV television camera TV camera television detector TV camera television camera tube temperature control tertiary mirror thin film three-dimensional spectroscopy three dimensional spectroscopy time measurement time determination time-resolved spectroscopy time signal time synchronization time synchronisation UK timing equipment timing device tip-tilt mirror tip tilt mirror tracking transfer function transit circle transit instrument transit telescope transmission grating two-dimensional detector two dimensional detector two-dimensional spectroscopy two dimensional spectroscopy ultraviolet camera ultraviolet detector ultraviolet filter ultraviolet observatory ultraviolet photography ultraviolet spectrograph ultraviolet telescope vacuum technique vapor deposition vertical circle Very Large Array VLA very large telescope very long baseline interferometer VLBI very long baseline interferometry VLBI vignetting Vilnius photometry visibility function VPH grating Walraven photometry VBLUW photometry waveguide weather station webcam wide-angle lens wide angle lens wide-field telescope wide field telescope wind vane X-ray detector X-ray observatory X-ray spectrograph X-ray spectrometer X-ray telescope Yagi antenna y array yoke mounting zenith telescope zenith tube photographic zenith tube