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So it's been requested that I make a thread about this, so here I go!
Mechanically, it includes an entrance slit, that slit went to a bounce mirror, then to a grating. This grating splits the incoming light, and forwards it to it's place in the spectrum. So now after that grating, two more bounce mirrors, and then the exit slit.
After that slit comes it's only electrical component, the PMT. For the purpose of explanation, this is a glorified photodiode. When the grating is tuned via a micrometer on the side, to the right wavelength going in, the light will hit the PMT, and this will send a signal to an outside voltmeter.
This voltmeter is wired to a 6 terminal switch. The switch includes power to the meter, or the PMT, pending switch position.
A potentiometer is turned that applies more or less power to the PMT, I can just this to change the sensitivity.
In the second switch position, the power is going directly to the meter, and I can use this to monitor the power that I am applying to the PMT, pending position of the potentiometer.
Feeling pretty lazy, so it may be a bit before I get images up. Also going to do an instructional video on external cavities sometime this weekend. So get ready to learn!
Mechanically, it includes an entrance slit, that slit went to a bounce mirror, then to a grating. This grating splits the incoming light, and forwards it to it's place in the spectrum. So now after that grating, two more bounce mirrors, and then the exit slit.
After that slit comes it's only electrical component, the PMT. For the purpose of explanation, this is a glorified photodiode. When the grating is tuned via a micrometer on the side, to the right wavelength going in, the light will hit the PMT, and this will send a signal to an outside voltmeter.
This voltmeter is wired to a 6 terminal switch. The switch includes power to the meter, or the PMT, pending switch position.
A potentiometer is turned that applies more or less power to the PMT, I can just this to change the sensitivity.
In the second switch position, the power is going directly to the meter, and I can use this to monitor the power that I am applying to the PMT, pending position of the potentiometer.
Feeling pretty lazy, so it may be a bit before I get images up. Also going to do an instructional video on external cavities sometime this weekend. So get ready to learn!