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EEM calculations in FRED Mikkel Brydegaard Applied Molecular Spectroscopy & Remote Sensing Atomic Physics, LTH.

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Presentation on theme: "EEM calculations in FRED Mikkel Brydegaard Applied Molecular Spectroscopy & Remote Sensing Atomic Physics, LTH."— Presentation transcript:

1 EEM calculations in FRED Mikkel Brydegaard Applied Molecular Spectroscopy & Remote Sensing Atomic Physics, LTH

2 Project

3 Components Fiber tip source Off axis parabolic mirror Quartz prism Achromat Sample window Chassis

4 Source Ocean Optics ø230 μm circular fiber tip 24° acceptance angle Apperture to 6° for collimating mirror Simulated spectral content: 300, 350, 400, 500 and 900 nm

5 Collimating mirror Newport. Off-Axis Replicated Parabolic Mirror, 1.500 in. Dia, 4.000 in. EFL, Protected Aluminum Coating

6 Prism Esco products Equilatheral fused silica 40mm sides 35° mean dispersion 300-900nm 40*cos(30+35/2)=27mm apperture Displacement of optical axis from center of circumcicle of prism 8.93 mm

7 Achromat Edmund optics Uncoated triplet CaF2 Fused Silica CaF2 Provided raytracing object from edmund upon signed request

8 Sample slit Quartz microscope cover slide Mirror coating Nano church

9 Chassis Imported from Alibre design Anodized aluminum Black lambertian 4% Contribution

10 Setup Fiber tip Newportv Off-axis paraboloid Esco Quartz prism Quartz window Edmund achromat CaF2-QS

11 Properties of interest Throughput Spectral resolution Signal to background Simulation variables Ray numbers Allow reflections Allow surface scatters

12 Resulting rays End raysC1C2C3 R1175385524710 R2240566122430448 R3145604187502693084

13 Simulation time Calculation timeC1C2C3 R10.933 sec5.94 secs31.2 secs R26.25 secs50.2 secs8.76 mins R335.6 secs5.23 mins54.2 mins

14 Throughput C1C2C3 R156,62%56,85% R260,95%61,23% R361,55%61,85%

15 FWHM FWHM mmC1C2C3 R10.1150.147 R20.146 R30.136 FWHM nmC1C2C3 R114.3018.33 R218.14 R316.9116.93

16 Added background BackgroundC1C2C3 R10,00E+004,70E-032,16E-04 R20,00E+001,40E-031,65E-05 R30,00E+009,09E-042,73E-06

17 Signal and back ground contributions 3.5E0 1E-3 3E-6

18 Spatial profile of background contributions

19 Experiences Prism displacement Ommitment of achromat, in accordance with ”Spectrograph design fundamentals / J.F. James.” More stray light along slit than perpendicular to it Parabolic mirrors in FRED

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