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The problem with the glow on the ETMY face is due to the red light being scattered off of the optical table from the HeNe laser for the OL. Why is the red light hitting the table?
One way to fix the problem for the camera image is to insert a long pass filter (if Steve can find one).
Edmund Optics: NT62-874
Edmund Optics: NT65-731
Edmund Optics: NT32-759
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Atm1, condition: all oplev lasers are off or blocked, green shutters are closed at the ends, PSL out put shutter is closed, all outside LED illuminating are off, all room lights are off
Only the OSEMs are on. ETMY and ITMX are still look like illuminated.
Atm2, condition: open PSL shutter. ETMY at 11 o'clock and ETMX 1 o'clock bright scattered spot of 1064 nm are visible
Atm3, condition: closed PSL shutter and restored all oplev He/Ne lasers, it is visible at ETMY
Next: I will disconnect power to OSEMs at ETMY |