Homebrew PCBs

Sorry, forgot one other measurement [for LEDs]:

Luminous intensity: Brightness of the LED at a given current:
mcd = millicandela 

Visible Blue sits at around 430 Nm



--- In Homebrew_PCBs@yahoogroups.com, "Boman33" <boman33@...> wrote:
>
> Per,
> 
> OceanOptics is the low-cost supplier.  I can get you other companies if you
> want to spend more money..
> 
> For spectral output you typically would measure radiation vs. wavelength
> band so you end up with microwatt per nanometer type numbers.  Then you need
> to define the area of the sensor for the measurement.  You might be able to
> find a used spectrometer to get proper readings.
> 
> Good luck!
> 
> Bertho
> 
>  
> 
>  
> 
> From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
> On Behalf Of Per Mattsson
> Sent: Monday, January 23, 2012 02:42
> To: Homebrew_PCBs@yahoogroups.com
> Cc: Per Mattsson
> 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@... <mailto:per%40permattsson.se>  -
> +46706524567
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>