Optical Spectroscopy with dispersive Spectrometers
Basics - Building Blocks - Systems - Applications

This page summarizes chapter 8 of the book
"Fundamentals of Dispersive Optical Spectroscopy Systems",
ISBN 9780819498243, SPIE monographs, Bellingham, WA, USA

Application S1
Straylight / False Light
Origin, Impact, Analysis
 

This page presents the directory, the signs and symbols, conversions, and equations of the book, while the details are an exclusive part of  the book.

Pls Note: even the topic of Calibration is presented as part of the "Applications" here, it is part of the "Fundamentals" in the printed books.

S1.0 Introduction and Nomenclature
False light or straylight is one of the effects in optical spectroscopy, which are absolutely unwanted, but (almost) unavoidable. The name "straylight" describes uncontrolled, vagabonding light. It combines from scattered light, uncontrolled reflections, over-illumination, and overlay of spectral orders. The origin of straylight, and its impact on the desired signal, is complex, and diversified. For example, the analysis of an LED will create rather little straylight, compared to the illumination with strong broadbanded light. Consequently, the straylight needs to be viewed application depending. That is why an extra page is dedicated for the issue. Important as well, is the response of the receiver, detector or experiment, upon the different wavelengths available as desired and undesired signal.

Graph S1.1 curves of scatter-detectors-lamps

Graph S1.1 shows some Parameters, which may impact the Degree of Disturbance.
S1.2 Impact of Straylight
S1.2.1 Disturbance from Straylight in the Application of discrete spectral Signals

Graph S1.2 Argon-Ion Laser lines in the green range

Graph S1.2 represents the Lines of a 10 W Argon-Ion Laser in the Range of 500 nm.
S1.2.2 Disturbance from Straylight in the Application of broadbanded spectral Signals
S1.3 Analysis and Quantization of Straylight in Spectrometers and Spectro Photometers
Grafik S1.3 setup to characterize Transfer und Straylight
Graph S1.3 represents an optimized Test set-up to measure the Transfer and Straylight of Spectrometers.

S1.4 Minimizing the impact of Disturbance by Optimization
 

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Status April 2012