Homebrew PCBs

Per

UV intensity is measured in Watts per Steradian, see:

<http://books.google.co.uk/books?id=vu7OU2EWKPoC&pg=PA41&lpg=PA41&dq=steradian+UV&source=bl&ots=pcRnx7NrDI&sig=9v-0af4GfWVN2e-AoUxkJrYQlzQ&hl=en&sa=X&ei=xm4hT9mcNc3Msgb_kMGDCA&sqi=2&ved=0CCEQ6AEwAA#v=onepage&q=steradian%20UV&f=false>


Malcolm
 
I don't suffer from insanity I enjoy it!


________________________________
 From: Per Mattsson <per@permattsson.se>
To: Homebrew_PCBs@yahoogroups.com 
Cc: Per Mattsson <per@permattsson.se> 
Sent: Monday, January 23, 2012 7:41 AM
Subject: [Homebrew_PCBs] UV light sources
 

  
Hi guys!

How can one measure the wavelengths, either a graph over the spectrum or certain wavelengths of a UV-source?
What unit would one use -  Watt, Joule?

I have a few colormeters but those are for human visible light intended for graphics industry. We use candela, cd, or lux for intensity there.

I've found this: http://www.oceanoptics.com/products/usb4000uvvis.asp
"Priced from $3,061"  Ouch ....

Next question, what wavelengths are of interest here - different wavelengths for different materials I suppose? 
300nm?

I'm currently curing UV-inked paper with two 160W disco Blacklights but I'm shure I could do it more efficient with other sources. 
The paper let the ink go deep into the material so the UV-lights/leds in the printers does not really let the ink solidify.

/Per

Per Mattsson - per@... - +46706524567
 

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