nanoDLP

Wow!  wow!  Guys this is great! I hope it's okay to glom on this thread and ask/inject some of my experiences on this...

I'm just starting to do the same mapping for my Viewsonic.  I started off doing measurements with the spectrometer from public labs. (https://publiclab.org/wiki/spectrometer)  With this I tuned in the projector settings allowing increased blue light shift that was a stable curve between 390-450nm.  (Because the UV sensor from spark is best up until about 390 (ML8511) - after which the sensitivity falls off rapidly).  It's probably best to choose a smooth curve over this area since most resins used for the DLPs cure at 405nm (or are at least targeted for this wavelength).  I'll go in and list those settings I found to be best for the curve in a separate message. 

I also made a mount for the UV sensor with measurement tabs on the sides to allow easier identification of where the sensor is being placed on the grid.  Again, if you guys are interested I'll post this handle in stl in a separate post.

Just to make sure I'm caught up with the journey thus far.  We are all trying to normalize the intensity of the UV across the mask.  The current method is to use the lowest value and reduce brightness on the other areas...I just wanted to ask, if we start with a brightness value of 20% could we not adjust up and down to make it easier?  If the lamp operates on a curve for intensity, a beginning default of higher brightness (50+) to start off might be adding to this polynomial solution of ^5 power and thus the error. 

I hope I'm helping...

Elliot