[Test-Equipment] Spectroscope

[Paul Galpin]

Greetings, all!

Can anyone help me with information on an antique piece of test equipment?
Google is singularly unhelpful.

I found myself an R. FUESS spectroscope Model (serial number?) 5018 in a
junk shop. It seems to do what one expects, in that a beam of light shone
into the glass port on the side appears in the eyepiece as a spectrum which
can be moved by the calibrated control. There is an adjustment for slot
width.

Fine, but what next? I assume that one is looking for lines of zero energy
(Frauenhofer lines?) **Update - I just shone my desk lamp with its
low-energy globe (bulb) and I see that there very clear peaks of energy
there. Most of it is in one red and one green peak(s). Using a "white"
bluish LED gives a continuous spectrum, I would have definitely expected to
find peaks.

If the light is meant to come from metal heated in a flame, then it would be
dangerously close to my left eyebrow!

Is there meant to be some sort of attachment to the side port? It's about
5mm square, with a "wall" about 4mm high round the top, rear and bottom.

If one wanted to take measurements, how would you fit some sort of sensor to
it, and what sort?  CdS? opto-coupler type sensor?

For calibration, what sort of temperature would give a fairly level output
over the visible range and outside?

I believe that 9000K is up in the blue, and 4500k is up in the red, so
perhaps somewhere in between might work .

Paul Galpin
ZS2PG