Optical Spectroscopy with
Basics - Building Blocks - Systems - Applications
Illumination of and with Spectrometers
Light Sources – Fibre Optics – Transfer Systems – Radiometry.
Please note: The content
of the BASICS pages is available in extended, printed shape since June 2014:
"Fundamentals of dispersive optical Spectroscopy
SPIE-Monograph, ISBN No.: 9780819498243
The internet pages have been reduced to the headlines, equations, and figures of the different chapters . We hope, that the brief collection and the complete and extended book will be as helpful and useful for you, as the spectra-magic.de/Basics have been.
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Aim of the “Fundamentals” is to help starters with the definition and verification of the instrumentation for optical spectroscopy. Experienced spectroscopists and expert physicists will know some of the issues better and in deeper detail. But hopefully, every reader may find things worth mentioning.
5.0.1 Energy and Power of Optical Signals
Graph 109: displays the power of a single photon vs the wavelength.
5.0.2 The different Emission Characteristics of Light Sources, and the Principles of Collection
Light sources do emit in very different kinds, thus special techniques of collection are required.
Graph 110: The most important emission characteristics of light sources
5.0.3 Definition of Radiation, Parameters and Nomenclature
Radiometric Nomenclature and Parameters, Description:
5.1 The different Types of Radiation, and their Collection
5.1.1 Laser Radiation
Graph 111A: Four typical far field laser images
Graph 111B: Laser-internal normal incidence and grazing incidence spectrometer
Graph 112: shows two of the options of Laser beam transfer.
Graph 113 shows two ways of the transfer of cone shaped light.
5.1.3 Ball-shaped Radiation from Point Sources: Lamps
Graph 114: Ways to collect ball shaped radiation and illuminate a spectrometer.
Graph 115: the most popular wide band radiators used in optical spectroscopy:
Graph 116: Typical, simplified spectra of Deuterium (purple curve, D2), Tungsten Halogen (red curve, HLX) and Xenon
188.8.131.52 Light Collection and Transfer into a Spectrometer.
5.1.4 Diffuse Radiation, collected by integrating Spheres
Graph 117: Two typical applications of integrating spheres in optical spectroscopy.
Graph 118: Efficiency curves of popular coatings for integrating spheres
Graph 119 covers the equations required with graphical support.
The Collection of Lamp Radiation.
Graph 120 proposes a solution of efficient light collection from large and hot lamps.
184.108.40.206 Approaching the Design of a Sphere
5.1.5 NIR Radiation
Graph 121: Radiance of thermal sources in the NIR at filament temperatures between 1300°C and 2927°C.
5.1.6 IR Radiators
Graph 122: Typical performance data of thermal IR radiators.
5.2 Examples on the Optimization of Spectrometer Systems
Graph 123A shows three curves of an experimental setup with Deuterium Light Source,
Graph 123B: a series of measurements documents the transfer of a spectrometer with Deuterium lamp (the emission curve is “D2“ – red), a UV silicon detector (efficiency curve is the brown “UV-Si”).
Change-over Wavelengths of Lamps, Gratings, and Detectors
Graph 124 demonstrates the selection of the change-over point.
Graph 125 displays a measured Xenon spectrum in the range of 200 – 1700 nm.
5.2.1 and what will at the End really come out of an Illumination Monochromator System?
5.3 Light Transfer and Coupling by Fibre Guides and Optics
5.3.1 Fibreguides – Light Wave Guides – Fibre/fibre Optics
Graph 126: The components of an optical fibre guide and it´s angles.
Graph 127: Several typical Transmission Curves of Materials, used in optical Spectroscopy.
5.3.2 Fibre Optic Parameters
220.127.116.11 Bending Radius
18.104.22.168 Losses of in/out Coupling
22.214.171.124 Modes and Polarization
126.96.36.199 Acceptance Angle
188.8.131.52 Fluorescence, Raman, and Brillouin Effects in Fibres
5.3.3 The "flexible optical Bench", and a serious Precaution
5.3.4 Typical Kinds and Variations of single Fibres and Fibre Cables
Graph 128: Often found fibre optic cable designs:
5.4 Transfer Systems
5.4. Transfer Systems in General
the general Rule of Light Transfer
5.4.1 In and Out Coupling by Optical Fibres only
Graph 129 shows the coupling of a spectrometer with fibre optics, without further optics.
5.4.2 In and Out Coupling by Lens Systems
Graph 130 reviews some solutions to couple spectrometer and fibre optics by lens systems.
5.4.3 In and Out Coupling by Mirror Systems
Graph 131 deals with the mirror coupling of spectrometer and fibre guide.
Hoping, the study of the book Elements of dispersive optical Spectrometers will be of help for you, we remain with special thanks for your interest.
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Spectroscopy with dispersive Spectrometers
Basics - Building Blocks - Systems - Applications " are reserved by
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Status April 2012