First plot showing Plab spectra as compared to SpexFluoroMax

Second plot showing more detail

This was the original spectrometer from Plab's spectrometer kit that inspired me to modify its concept and build the DH 4.2 spectrometer, so I kept their original design intact and only put the parts in an enclosure, I thought perhaps this might make a good visual comparison between the original and my modified design.

Measurements between the slit to cmos camera eye are not as important as precise alignment of camera to DVD grating and DVD grating to slit entrance, so with this in mind, the camera is now at 39 deg relative to slit entrance and DVD grating is at same (39 deg) relative to cmos camera eye, for a UV-VIS spectral bandwidth of 343nm - 700nm (this is due to the camera's limitations.)

I have reduced the ruling density of the DVD grating down to 4.7g which equates to 1,351 lines per mm. The slit width is now 0.12mm. Project box dimensions are: 190mm X 109mm X 55mm

Slit width dimensions are: 25mm in length Cmos camera from slit: 88mm Camera angle: 39.5 degrees DVD grating angle: 39 degrees Entrance coupler for slit and cuvette holder: 44mm in Diameter

http://publiclab.org/notes/dhaffnersr/06-22-2016/plab-v2-5-upgrade-2-comparison-spectra-to-spexfluoromax-spectrometer