{"product_id":"optics-and-photonics-isbn-9780470017845","title":"Optics and Photonics","description":"The Second Edition of this successful textbook provides a clear, well-written introduction to both the fundamental principles of optics and the key aspects of photonics to show how the subject has developed in the last few decades, leading to many modern applications. \u003cb\u003e\u003ci\u003eOptics and Photonics: An Introduction, Second Edition\u003c\/i\u003e\u003c\/b\u003e thus provides a complete undergraduate course on optics in a single integrated text, and is an essential resource for all undergraduate physics, science and engineering students taking a variety of optics based courses. \u003cp\u003eSpecific changes for this edition include:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eNew material on modern optics and photonics\u003c\/li\u003e \u003cli\u003eRearrangement of chapters to give a logical progression, comprising groups of chapters on geometric optics, wave optics and photonics\u003c\/li\u003e \u003cli\u003eMany more worked examples and problems\u003c\/li\u003e \u003cli\u003eSubstantial revisions to chapters on Holography, Lasers and the Interaction of Light with Matter\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSolutions can be found at: www.booksupport.wiley.com\u003c\/p\u003e  PREFACE.  \u003cp\u003e\u003cb\u003e1. LIGHT AS WAVES, RAYS AND PHOTONS.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe nature of light.\u003c\/p\u003e \u003cp\u003eWaves and rays.\u003c\/p\u003e \u003cp\u003eTotal internal reflection.\u003c\/p\u003e \u003cp\u003eThe light wave.\u003c\/p\u003e \u003cp\u003eElectromagnetic waves.\u003c\/p\u003e \u003cp\u003eThe electromagnetic spectrum.\u003c\/p\u003e \u003cp\u003eStimulated emission: the laser. Photons and material particles.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e2. GEOMETRIC OPTICS.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe thin prism: the ray approach and the wavefront approach.\u003c\/p\u003e \u003cp\u003eThe lens as an assembly of prisms.\u003c\/p\u003e \u003cp\u003eRefraction at a spherical surface.\u003c\/p\u003e \u003cp\u003eTwo surfaces; the simple lens.\u003c\/p\u003e \u003cp\u003eImaging in spherical mirrors.\u003c\/p\u003e \u003cp\u003eGeneral properties of imaging systems.\u003c\/p\u003e \u003cp\u003eSeparated thin lenses in air.\u003c\/p\u003e \u003cp\u003eRay tracing by matrices.\u003c\/p\u003e \u003cp\u003eLocating the cardinal points: position of a nodal point, focal point, principal point, focal length, the other cardinal points.\u003c\/p\u003e \u003cp\u003ePerfect imaging.\u003c\/p\u003e \u003cp\u003ePerfect imaging of surfaces.\u003c\/p\u003e \u003cp\u003eRay and wave aberrations.\u003c\/p\u003e \u003cp\u003eWave aberration on-axis – spherical aberration.\u003c\/p\u003e \u003cp\u003eOff-axis aberrations.\u003c\/p\u003e \u003cp\u003eThe influence of aperture stops.\u003c\/p\u003e \u003cp\u003eThe correction of chromatic aberration.\u003c\/p\u003e \u003cp\u003eAchromatism in separated lens systems.\u003c\/p\u003e \u003cp\u003eAdaptive optics.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e3. OPTICAL INSTRUMENTS.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe human eye.\u003c\/p\u003e \u003cp\u003eThe simple lens magnifier.\u003c\/p\u003e \u003cp\u003eThe compound microscope.\u003c\/p\u003e \u003cp\u003eThe confocal scanning microscope.\u003c\/p\u003e \u003cp\u003eResolving power; conventional and near-field microscopes.\u003c\/p\u003e \u003cp\u003eThe telescope.\u003c\/p\u003e \u003cp\u003eAdvantages of the various types of telescope.\u003c\/p\u003e \u003cp\u003eBinoculars.\u003c\/p\u003e \u003cp\u003eThe camera.\u003c\/p\u003e \u003cp\u003eIllumination in optical instruments.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e4. PERIODIC AND NON-PERIODIC WAVES.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eSimple harmonic waves.\u003c\/p\u003e \u003cp\u003ePositive and negative frequencies.\u003c\/p\u003e \u003cp\u003eStanding waves. Beats between oscillators.\u003c\/p\u003e \u003cp\u003eSimilarities between beats and standing wave patterns.\u003c\/p\u003e \u003cp\u003eStanding waves at a reflector.\u003c\/p\u003e \u003cp\u003eThe Doppler effect.\u003c\/p\u003e \u003cp\u003eDoppler radar.\u003c\/p\u003e \u003cp\u003eAstronomical aberration.\u003c\/p\u003e \u003cp\u003eFourier series.\u003c\/p\u003e \u003cp\u003eModulated waves: Fourier transforms.\u003c\/p\u003e \u003cp\u003eModulation by a non-periodic function.\u003c\/p\u003e \u003cp\u003eConvolution.\u003c\/p\u003e \u003cp\u003eDelta and grating functions.\u003c\/p\u003e \u003cp\u003eAutocorrelation and the power spectrum.\u003c\/p\u003e \u003cp\u003eWave groups.\u003c\/p\u003e \u003cp\u003eAn angular spread of plane waves.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e5. ELECTROMAGNETIC WAVES.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eMaxwell’s equations.\u003c\/p\u003e \u003cp\u003eTransverse waves.\u003c\/p\u003e \u003cp\u003eReflection and transmission: Fresnel’s equations.\u003c\/p\u003e \u003cp\u003eTotal internal reflection: evanescent waves.\u003c\/p\u003e \u003cp\u003eEnergy flow.\u003c\/p\u003e \u003cp\u003ePhoton momentum and radiation pressure.\u003c\/p\u003e \u003cp\u003eBlackbody radiation.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e6. FIBRE AND WAVEGUIDE OPTICS.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe light pipe.\u003c\/p\u003e \u003cp\u003eGuided waves.\u003c\/p\u003e \u003cp\u003eThe slab dielectric guide.\u003c\/p\u003e \u003cp\u003eEvanescent fields in fibre optics.\u003c\/p\u003e \u003cp\u003eCylindrical fibres and waveguides.\u003c\/p\u003e \u003cp\u003eNumerical aperture. Materials for optical fibres.\u003c\/p\u003e \u003cp\u003eDispersion in optical fibres.\u003c\/p\u003e \u003cp\u003eDispersion compensation.\u003c\/p\u003e \u003cp\u003eModulation and communications.\u003c\/p\u003e \u003cp\u003eFibre optical components.\u003c\/p\u003e \u003cp\u003eHole-array light guide; photonic crystal fibres.\u003c\/p\u003e \u003cp\u003eOptical fibre sensors.\u003c\/p\u003e \u003cp\u003eFabrication of optical fibres.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e7. POLARIZATION OF LIGHT.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003ePolarization of transverse waves.\u003c\/p\u003e \u003cp\u003eAnalysis of elliptically polarized waves.\u003c\/p\u003e \u003cp\u003ePolarizers.\u003c\/p\u003e \u003cp\u003eLiquid crystal displays.\u003c\/p\u003e \u003cp\u003eBirefringence in anisotropic media.\u003c\/p\u003e \u003cp\u003eBirefringent polarizers.\u003c\/p\u003e \u003cp\u003eGeneralizing Snell’s law for anisotropic materials.\u003c\/p\u003e \u003cp\u003eQuarter- and half-wave plates.\u003c\/p\u003e \u003cp\u003eOptical activity.\u003c\/p\u003e \u003cp\u003eFormal descriptions of polarization.\u003c\/p\u003e \u003cp\u003eInduced birefringence.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e8. INTERFERENCE.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eInterference.\u003c\/p\u003e \u003cp\u003eYoung’s experiment.\u003c\/p\u003e \u003cp\u003eNewton’s rings.\u003c\/p\u003e \u003cp\u003eInterference effects with a plane-parallel plate.\u003c\/p\u003e \u003cp\u003eThin films.\u003c\/p\u003e \u003cp\u003eMichelson’s spectral interferometer.\u003c\/p\u003e \u003cp\u003eMultiple beam interference.\u003c\/p\u003e \u003cp\u003eThe Fabry–Pérot interferometer.\u003c\/p\u003e \u003cp\u003eInterference filters.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e9. INTERFEROMETRY: LENGTH, ANGLE AND ROTATION.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe Rayleigh interferometer.\u003c\/p\u003e \u003cp\u003eWedge fringes and end gauges.\u003c\/p\u003e \u003cp\u003eThe Twyman and Green interferometer.\u003c\/p\u003e \u003cp\u003eThe standard of length.\u003c\/p\u003e \u003cp\u003eThe Michelson–Morley experiment.\u003c\/p\u003e \u003cp\u003eDetecting gravitational waves by interferometry.\u003c\/p\u003e \u003cp\u003eThe Sagnac ring interferometer.\u003c\/p\u003e \u003cp\u003eOptical fibres in interferometers.\u003c\/p\u003e \u003cp\u003eThe ring laser gyroscope.\u003c\/p\u003e \u003cp\u003eMeasuring angular width.\u003c\/p\u003e \u003cp\u003eThe effect of slit width.\u003c\/p\u003e \u003cp\u003eSource size and coherence.\u003c\/p\u003e \u003cp\u003eMichelson’s stellar interferometer.\u003c\/p\u003e \u003cp\u003eVery long baseline interferometry.\u003c\/p\u003e \u003cp\u003eThe intensity interferometer.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e10. DIFFRACTION.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eDiffraction at a single slit.\u003c\/p\u003e \u003cp\u003eThe general aperture.\u003c\/p\u003e \u003cp\u003eRectangular and circular apertures: uniformly illuminated single slit: two infinitesimally narrow slits: two slits with finite width: uniformly illuminated rectangular aperture: uniformly illuminated circular aperture.\u003c\/p\u003e \u003cp\u003eFraunhofer and Fresnel diffraction.\u003c\/p\u003e \u003cp\u003eShadow edges – Fresnel diffraction at a straight edge.\u003c\/p\u003e \u003cp\u003eDiffraction of cylindrical wavefronts.\u003c\/p\u003e \u003cp\u003eFresnel diffraction by slits and strip obstacles.\u003c\/p\u003e \u003cp\u003eSpherical waves and circular apertures: half-period zones.\u003c\/p\u003e \u003cp\u003eFresnel–Kirchhoff diffraction theory.\u003c\/p\u003e \u003cp\u003eBabinet’s principle.\u003c\/p\u003e \u003cp\u003eThe field at the edge of an aperture.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e11. THE DIFFRACTION GRATING AND ITS APPLICATIONS.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe diffraction grating.\u003c\/p\u003e \u003cp\u003eDiffraction pattern of the grating.\u003c\/p\u003e \u003cp\u003eThe effect of slit width and shape.\u003c\/p\u003e \u003cp\u003eFourier transforms in grating theory.\u003c\/p\u003e \u003cp\u003eMissing orders and blazed gratings.\u003c\/p\u003e \u003cp\u003eMaking gratings.\u003c\/p\u003e \u003cp\u003eConcave gratings.\u003c\/p\u003e \u003cp\u003eBlazed, echellette, echelle and echelon gratings.\u003c\/p\u003e \u003cp\u003eRadio antenna arrays: end-fire array shooting equally in both directions: end-fire array shooting in only one direction: the broadside array: two-dimensional broadside arrays.\u003c\/p\u003e \u003cp\u003eX-ray diffraction with a ruled grating.\u003c\/p\u003e \u003cp\u003eDiffraction by a crystal lattice.\u003c\/p\u003e \u003cp\u003eThe Talbot effect.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e12. SPECTRA AND SPECTROMETRY.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eSpectral lines.\u003c\/p\u003e \u003cp\u003eLinewidth and lineshape.\u003c\/p\u003e \u003cp\u003eThe prism spectrometer.\u003c\/p\u003e \u003cp\u003eThe grating spectrometer.\u003c\/p\u003e \u003cp\u003eResolution and resolving power.\u003c\/p\u003e \u003cp\u003eResolving power: the prism spectrometer.\u003c\/p\u003e \u003cp\u003eResolving power: grating spectrometers.\u003c\/p\u003e \u003cp\u003eThe Fabry–Pe´rot spectrometer.\u003c\/p\u003e \u003cp\u003eTwin beam spectrometry; Fourier transform spectrometry.\u003c\/p\u003e \u003cp\u003eIrradiance fluctuation, or photon-counting spectrometry.\u003c\/p\u003e \u003cp\u003eScattered laser light.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e13. COHERENCE AND CORRELATION.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eTemporal and spatial coherence.\u003c\/p\u003e \u003cp\u003eCorrelation as a measure of coherence.\u003c\/p\u003e \u003cp\u003eTemporal coherence of a wavetrain.\u003c\/p\u003e \u003cp\u003eFluctuations in irradiance.\u003c\/p\u003e \u003cp\u003eThe van Cittert–Zernike theorem.\u003c\/p\u003e \u003cp\u003eAutocorrelation and coherence.\u003c\/p\u003e \u003cp\u003eTwo-dimensional angular resolution.\u003c\/p\u003e \u003cp\u003eIrradiance fluctuations: the intensity interferometer.\u003c\/p\u003e \u003cp\u003eSpatial filtering.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e14. HOLOGRAPHY.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eReconstructing a plane wave.\u003c\/p\u003e \u003cp\u003eGabor’s original method.\u003c\/p\u003e \u003cp\u003eBasic holography analysis.\u003c\/p\u003e \u003cp\u003eHolographic recording: off-axis holography.\u003c\/p\u003e \u003cp\u003eAspect effects.\u003c\/p\u003e \u003cp\u003eTypes of hologram.\u003c\/p\u003e \u003cp\u003eHolography in colour.\u003c\/p\u003e \u003cp\u003eThe rainbow hologram.\u003c\/p\u003e \u003cp\u003eHolography of moving objects.\u003c\/p\u003e \u003cp\u003eHolographic interferometry.\u003c\/p\u003e \u003cp\u003eHolographic optical elements.\u003c\/p\u003e \u003cp\u003eHolographic data storage.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e15. LASERS.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eStimulated emission.\u003c\/p\u003e \u003cp\u003ePumping: the energy source.\u003c\/p\u003e \u003cp\u003eAbsorption and emission of radiation.\u003c\/p\u003e \u003cp\u003eLaser gain.\u003c\/p\u003e \u003cp\u003ePopulation inversion.\u003c\/p\u003e \u003cp\u003eThreshold gain coefficient.\u003c\/p\u003e \u003cp\u003eLaser resonators.\u003c\/p\u003e \u003cp\u003eBeam irradiance and divergence.\u003c\/p\u003e \u003cp\u003eExamples of important laser systems: gas lasers, solid state lasers, liquid lasers.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e16. LASER LIGHT.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eLaser linewidth.\u003c\/p\u003e \u003cp\u003eSpatial coherence: laser speckle.\u003c\/p\u003e \u003cp\u003eTemporal coherence and coherence length.\u003c\/p\u003e \u003cp\u003eLaser pulse duration: Q-switching, mode-locking.\u003c\/p\u003e \u003cp\u003eLaser radiance.\u003c\/p\u003e \u003cp\u003eFocusing laser light.\u003c\/p\u003e \u003cp\u003ePhoton momentum: optical tweezers and trapping; optical tweezers; laser cooling.\u003c\/p\u003e \u003cp\u003eNon-linear optics.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e17. SEMICONDUCTORS AND SEMICONDUCTOR LASERS.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eSemiconductors.\u003c\/p\u003e \u003cp\u003eSemiconductor diodes.\u003c\/p\u003e \u003cp\u003eLEDs and semiconductor lasers; heterojunction lasers.\u003c\/p\u003e \u003cp\u003eSemiconductor laser cavities.\u003c\/p\u003e \u003cp\u003eWavelengths and tuning of semiconductor lasers.\u003c\/p\u003e \u003cp\u003eModulation.\u003c\/p\u003e \u003cp\u003eOrganic semiconductor LEDs and lasers.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e18. SOURCES OF LIGHT.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eClassical radiation processes: radiation from an accelerated charge; the Hertzian dipole.\u003c\/p\u003e \u003cp\u003eFree–free radiation.\u003c\/p\u003e \u003cp\u003eCyclotron and synchrotron radiation.\u003c\/p\u003e \u003cp\u003eFree electron lasers.\u003c\/p\u003e \u003cp\u003eCerenkov radiation.\u003c\/p\u003e \u003cp\u003eThe formation of spectral lines: the Bohr model; nuclear mass; quantum mechanics; angular momentum and electron spin.\u003c\/p\u003e \u003cp\u003eLight from the Sun and Stars.\u003c\/p\u003e \u003cp\u003eThermal sources.\u003c\/p\u003e \u003cp\u003eFluorescent lights. Luminescence sources.\u003c\/p\u003e \u003cp\u003eElectroluminescence.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e19. INTERACTION OF LIGHT WITH MATTER.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe classical resonator.\u003c\/p\u003e \u003cp\u003eRayleigh scattering.\u003c\/p\u003e \u003cp\u003ePolarization and refractive index in dielectrics.\u003c\/p\u003e \u003cp\u003eFree electrons.\u003c\/p\u003e \u003cp\u003eFaraday rotation in a plasma.\u003c\/p\u003e \u003cp\u003eResonant atoms in gases.\u003c\/p\u003e \u003cp\u003eThe refractive index of dense gases, liquids and solids.\u003c\/p\u003e \u003cp\u003eAnisotropic refraction.\u003c\/p\u003e \u003cp\u003eBrillouin scattering.\u003c\/p\u003e \u003cp\u003eRaman scattering.\u003c\/p\u003e \u003cp\u003eThomson and Compton scattering by electrons.\u003c\/p\u003e \u003cp\u003eA summary of scattering processes.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e20. THE DETECTION OF LIGHT.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003ePhotoemissive detectors.\u003c\/p\u003e \u003cp\u003eSemiconductor detectors.\u003c\/p\u003e \u003cp\u003eSemiconductor junction photodiodes.\u003c\/p\u003e \u003cp\u003eImaging detectors. Noise in photodetectors. Image intensifiers.\u003c\/p\u003e \u003cp\u003ePhotography.\u003c\/p\u003e \u003cp\u003eThermal detectors.\u003c\/p\u003e \u003cp\u003e\u003cb\u003e21. OPTICS AND PHOTONICS IN NATURE.\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eLight and colour in the open air.\u003c\/p\u003e \u003cp\u003eThe development of eyes.\u003c\/p\u003e \u003cp\u003eCorneal and lens focusing.\u003c\/p\u003e \u003cp\u003eCompound eyes.\u003c\/p\u003e \u003cp\u003eReflection optics.\u003c\/p\u003e \u003cp\u003eFluorescence and photonics in a butterfly.\u003c\/p\u003e \u003cp\u003eBiological light detectors.\u003c\/p\u003e \u003cp\u003ePhotosynthesis.\u003c\/p\u003e \u003cp\u003eAppendix 1: Answers to Selected Problems.\u003c\/p\u003e \u003cp\u003eAppendix 2: Radiometry and Photometry.\u003c\/p\u003e \u003cp\u003eAppendix 3: Refractive Indices of Common Materials.\u003c\/p\u003e \u003cp\u003eAppendix 4: Spectral Lineshapes and Linewidths.\u003c\/p\u003e \u003cp\u003eAppendix 5: Further Reading.\u003c\/p\u003e \u003cp\u003eINDEX.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eSir Francis Graham Smith\u003c\/strong\u003e, Macclesfield, Cheshire, UK\u003cbr\u003eNow retired, Graham Smith has had a distinguished career in radio astronomy having held the post of Astronomer Royal 1982 - 1990, and most recently was Langworthy Professor of Physics at Manchester University. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProfessor Terry King\u003c\/strong\u003e, School of Physics \u0026amp; Astronomy, University of Manchester, UK\u003cbr\u003eCurrently head of the Laser Photonics Group, Terry King has many years experience in research, teaching and consultancy. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProfessor Daniel Wilkins\u003c\/strong\u003e, Department of Physics, University of Nebraska, Omaha, NE, USA\u003cbr\u003eDan Wilkins holds the Milo Bail Chair of Physics at Nebraska and has taught optics and a wide variety of undergraduate courses for many years. His main research focus is general relativity theory.   \u003ca id=\"JACKET_COPY\" name=\"JACKET_COPY\"\u003eThe second edition of this successful textbook provides a clear, well-written introduction to both the fundamental principles of optics and the key aspects of photonics to show how the subject has developed in the last few decades, leading to many modern applications. The book thus provides a complete undergraduate course on optics in a single integrated text. The new edition has been completely updated and specific important changes include:\u003c\/a\u003e  \u003c\/p\u003e\u003cul type=\"disc\"\u003e \u003cli\u003eNew material on modern optics and photonics.\u003c\/li\u003e \u003cli\u003eA rearrangement of chapters to give a logical progression comprising groups of chapters on geometric optics, wave optics and photonics. \u003c\/li\u003e \u003cli\u003eMany more worked examples and problems.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eIn addition, substantial revisions have been made to chapters on holography, lasers and the interaction of light with matter. For this edition Smith and King have been joined by a new co-author, Professor Dan Wilkins from the University of Nebraska at Omaha, who has many years experience of teaching optics courses. \u003c\/p\u003e \u003cp\u003eThis balanced, practical, modern introduction to optics and photonics and will prove invaluable to students taking optics courses within science and engineering.\u003c\/p\u003e","brand":"Wiley","offers":[{"title":"Default Title","offer_id":47989721170149,"sku":"NP9780470017845","price":63.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1842\/7735\/files\/9780470017845.jpg?v=1761785243","url":"https:\/\/k12savings.com\/products\/optics-and-photonics-isbn-9780470017845","provider":"K12savings","version":"1.0","type":"link"}