[time-nuts] LED Spectra mentioned in time-nuts Digest, Vol 66, Issue 164
Thomas A. Frank
ka2cdk at cox.net
Sat Jan 30 16:06:16 UTC 2010
> I'm curious to know a little more about what was used to measure
> the LED spectra. Not familiar with a "diode spectrometer" and
> Google is not being very helpful. The last time I measured optical
> spectra was a long long time ago using a PE UV/Visible
> spectrophotometer in the early days of semiconductor manufacturing
> - used it to measure dielectric thickness (on 1 inch and eventually
> 2 inch wafers). I'm interested in looking at the spectra of CF
> lamps - something which may not be realistic since we retired folks
> no longer have access to the fun (and expensive) lab equipment we
> used in our pre-retirement days.
I too would like to know more about the tool used to create those plots.
What I use is a 'manual' direct vision spectrophotometer which I
bought from Surplus Shed:
for $49 you can't really go wrong...however, when I have a bit of
spare coin I plan on buying a better one:
You see, the $93 one actually has a scale in it, the cheap one does not!
They also sell much higher grade ones for $200-400 that do a good
deal more (angle measurements etc).
But nothing that attaches to a computer for pretty plots. So I'm
intrigued as well.
Tom Frank, KA2CDK
More information about the time-nuts