PMT-RAS. Laura's Summer Experience. Turning the Clean Room Into a Dark Room. Objective: Test to See if PMT-RAS is Focused for Blue Light. Test output of PMT-RAS receiving light from a pinhole or open diode at different turns of the barrel.
Input into LED
Signal out of PMT-RAS
Translation Stage Controller
High Voltage Power Supply
Light refraction for different wave lengths
Red 633 nm
*Shorter wave lengths have larger refractive indices
Distance diode was observed
Distance from diode to PMT-RAS
~After the focus length was calculated according to blue light focused at infinity, it was established that the PMT-RAS is in focus and no extension of the barrel will be needed.