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Re: B&Wtech 473nm unit / Spectrometer Mods & Info Today I was having a look at the entrance slit and filter on my spectrometer, images attached. The entrance slit appears to be 50 microns, judging by the writing on it. I am curious as to the purpose of the filter, particularly if it is...

Re: B&Wtech 473nm unit / Spectrometer Mods & Info Following on from my previous post, attached is a plot of output power fluctuation over 30 minutes. The unit, still as I received it, peaks at 5.6 mW. I have removed the makeshift output 'pinhole' and it looks like it is a cut-out from some...

Re: B&Wtech 473nm unit / Spectrometer Mods & Info Thanks for checking the allen key size, I have a set on order. I am still getting to know my unit; here are I and V plots for the pump diode. These were taken over 30' periods with 1 second sampling interval -not simultaneously-. I have cropped...

Re: B&Wtech 473nm unit / Spectrometer Mods & Info Hello, I received my unit yesterday after a long shipping delay. Fantastic info on this and all other threads. Mine took a beating during shipping with the laser controller/PSU board almost loose. Thankfully the laser still lases although I need...