Thank you so much for your reply and assessment. I've just had a moment to skim your response.
Although I'm using a PMT with high-speed data collection and not a CCD, the info you provided
should enable me to move forward with the project. Yes, as expected the 1 AU separation is much smaller...
Hello, I need a bit of help. My age and fading competence are showing (no complaints, just facing up to it). I have an optical SETI observatory in Panama with a 20" Newtonian and a piggybacked 14" Cassy.
I wish to mask a portion of stellar Airy disks with an E-W wire on a small photometer...
Hi mfb,
Yes, using short driving pulses (<15ns), an NIR LED doesn't begin emitting until nearly 15 ns. Also, it is not difficult to approximate the number of photons expected from an LED given the power, distance, beam divergence, efficiency, etc.
I have been using photomultipliers for years...
I have been developing a SPAD based photometer having a 10 ns deadtime, near-zero dark counts, near-zero afterpulsing, and that is temperature independent (within a reasonable range). It works well with photon level pulsed optical signals, (10ns to several microsecond pulse widths at rates up...