Calibrating Monochromator

Every time a component of the monochromator (MC) is adjusted (light source, input slit, output position, etc), the feed from the monochromator requires calibration anew. 

Calibrating MC requires three steps

1. Calibrate spectrograph (not necessary if spectrograph is already calibrated)
2. Take monochromator data on spectrograph
3. Use gathered data to calibrate spectrograph

We detail an example below.  In this example, we use the StellarNet Inc Black Comet spectrograph, which we calibrate with the Ocean Optics KR-1 calibration light source.  Future re-calibrations of the monochromator should be able to use the same calibration of the StellarNet spectrograph, which we include in the GitHub repository with the calibration scripts:

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Here are the steps in our example:

STEP 0: If running this analysis on a new computer, you must download the StellarNet drivers for the black comet spectrograph. Here is how:

1. Download the SpectraWiz software.  The version for Windows 10, downloaded on 03/17/2022, is available on the above GitHub repository.  Various versions also available at the StellarNet website: https://www.stellarnet.us/stellarnet-downloads/ (Serial num of Black Comet is 18042612).
2. Useful instructions from StellarNet are available here: https://www.stellarnet.us/wp-content/uploads/Spectrometer-Installation.pdf Additional steps/notes are:
   
   1. Step 1: When you execute the file as administrator, the program will say something about PnPutil.exe not being recognized.  That is okay.  Move onto Step 2. 
   2. Step 5: after running the SWUpdatezAP-Install632 script as administrator, you may get an error popup that says something like "run as administrotor failed".  This is okay.  See if the StellarNet spectrograph has shown up on the desktop.

STEP 1: Calibrating Spectrograph with KR-1 Light Source

1. You need to determine your wavelength solution (reported wavelength vs true wavelength) of your calibrating spectrograph.  
   
   1. This step does not need to be repeated every time monochromator requires new calibration, provided the old spectrograph calibration data is available.
2. Pick a very small optical fiber to connect your calibration light and the spectrograph
   1. Very small as the raw KR-1 source is too bright for the spectrograph if not attenuated