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Phase [1] Mirror and Focal Lens Alignment Complete / Sec I

A project log for DAV5 V3.01 Raman Spectrometer

The only thing worth doing, is the thing worth doing right!

david-h-haffner-srDavid H Haffner Sr 11/21/2016 at 18:540 Comments

I re-designed the focal lens assembly and fitted it with an 8mm plossel eye piece, for a total focal distance of 95.19mm from base assembly to centerline @ mirror.

The plot showing the LED lamp and Solux lamp, are really the prize, at center wavelength on the Solux data plot, is 530nm, exactly what it should be when compared to the calibrated spectrum provided by http://solux.net/cgi-bin/tlistore/infopages/index.html

The LED lamp data plot is amazing also, the re-focusing is very apparent here, the LED lamp from GE, is mean't to simulate a CFL (compact fluorescent light,) and you can see on the plot data, that the blue band (shorter wavelength,) is close to calibration at 450nm and the green band (longer wavelength,) is 548nm. The specific calibration for these mercury bands are; blue-433nm and green-546nm, so I am a happy camper!

This is what made the difference, (I will be posting the assembly and redesign sequence for this,) this inserts in the rear of the lens holder assembly and added an extra 25mm to my focal distance to the mirror and increased the sharpness. I wanted a design where there didn't have to be any manual adjusting for the lens focusing aspect, it can be a big pain! So I took the extra time to do all the calculations and work before hand, so you could just assemble it and that would be that.

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