The discussion centers around the measurement of light intensity, exploring various methods and devices used in optics. Participants express curiosity about the direct measurements involved in determining light intensity, particularly in relation to power and area.
Participants do not reach a consensus on the best method for measuring light intensity, with multiple competing views and approaches presented throughout the discussion.
Limitations include the dependence on the specific characteristics of the measuring devices, the variability of intensity across different areas, and the historical context of measurement techniques.
This discussion may be of interest to students and professionals in optics, electrical engineering, and those exploring experimental methods for measuring light intensity.
Iforgot said:As long as they know the QE, they can do a calibration. They question is how do they know ~50 QE?
Iforgot said:As long as they know the QE, they can do a calibration. They question is how do they know ~50 QE?
I guess they could down convert one photon into two using a non-linear crystal? Then they would for sure know they have two? I'll admit, it's not a very straight forward method.
I was just throwing this idea out there. I don't know how they really measure light intensity either. That's what I'm trying to figure out. I'm still looking through equipment on the web. I'll post again when I find an intensity measurement whose calibration is straight forward.