czerny-turner spectrometer resolving the sodium doublet · czerny-turner spectrometer − resolving...
TRANSCRIPT
Highlights
• high-performance analysis of complex optical systems• full vectorial analysis of gratings by using rigorous algorithm (FMM)
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Parameter Description / Value & Unittype sodium lampmodel plane wavewavelengths characteristic doublet: 588.995 nm & 589.592 nmpolarization linear in x-direction (0°)
Specification: Light Source
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here
Specification: Apertures
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here
here
Parameter Description / Value & Unitwidth of entrance aperture 500 µmwidth of detector aperture 649 µm
Specification: Parabolic Mirrors
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Parameter Description / Value & Unittype parabolic mirrormaterial ideal high-reflective materialfocal length 1 mdiameter 20 mmtilt angle 5°reflectance 100%
here
Specification: Grating
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Parameter Description / Value & Unitgrating period 833 nmgrating height 282.4 nm (optimized for -1st order efficiency)blaze angle 18.7°grating material silver (Ag)substrate material silver (Ag)tilt angle variable
here
gratingheight
grating periodblaze angle
Specification: Detectors
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a, b
Position Modeling Technique Detector / Analyzerfull system
3D ray tracing 3D ray tracing system visualization
a field tracing 2D intensity (real color view)b field tracing power detection
Result: 3D Ray Tracing
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source screen gratingdetectoraperture
parabolicmirror 1
entrance aperture
parabolicmirror 2
for better illustration thedistances and focal length of the mirrors were reduced to 100 mm
Result: Field Tracing
analysis of sodium spectrum by tilting the spectrometer grating
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λ1 λ2detected power:
Result: Field Tracing
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λ1 λ2
width of detector aperture d2
detected power:
2D intensity:The used spectrometer setup is able to resolve the two wavelengths of
the characteristic sodium doublet.
Document & Technical Info
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code SPE.0002version of document 1.0
title Czerny-Turner Spectrometer − Resolving the Sodium Doublet
category Optical Metrology > Spectrometerauthor Rui Shi (LightTrans)used VL version 7.0.0.29
Specifications of PC Used for SimulationProcessor i7-4700MQ (1 CPU cores)RAM 16 GBOperating System Windows 8