Resolution and Calibration for the DH 4 v4a Spectrometer
I replaced the DVD diffraction grating for my spectrometer in order to get a more balanced spectral resolution that the JDEPC-OV05 cmos camera can easily process @ its pixel specifications, also I believe with further testing, it will help, since I cannot control exposure time, only gamma correction with Spekwin32.
The new ruling density for the diffraction grating is now; 4.7 GB = 0.74mm @ 1540 lines with a wavelength range of 650nm.
My Aries 532nm Green portable laser was used to calibrate the spectral bandwidth data table is given below;
Figure.1 is the laser line at FWHM, shown on the plot with the horizontal green line at exactly 0.37323[nm]
Figure.2 is the laser peak at 531.39nm (laser allowed to warm up for 1 minute), just shy of the 531.65 central wavelength for this laser specified on it's specifications sheet.
Figure.1a is the CFL calibration I did today using Plab spectral workbench 2, you can see from the title picture, that there is clearly 2 distinct green lines and a clear second blue line, I marked all the lines just for reference purposes.
Figure.2 is a zoomed in view of the second blue spectral line
Figure.3 is a zoomed in view of the double green peaks
Figure.3a is the full plot for the CFL spectrum with a quality "fit" of 7 using the 4.7 GB DVD diffraction grating