I would like to measure the light intensity delivered to my solution inside the double-walled glass reactor, as shown in the attached picture. I am using a Thorlabs PM100A power meter, which measures light power in watts. The desired unit for light intensity is watts per square meter, but I am unsure how to measure this due to the curved geometry and the double-walled structure of the reactor. How can I accurately determine the light intensity in such a setup?
Dear Sarawud Saleesongsom ,
just an idea...
You may acquire a second glass reactor and cut/remove the upper part (or cap).
After that you may arrange the sensor of the power meter upside down inside the reactor close to the inner wall, as indicated in the attachment.
You will get a rough estimate about the UV intensity there.
When the reactor is filled with the liquid you will have a bit higher intensity close to the inner wall because of the lack of a sharp jump of the refractive index at the glass to liquid interface.
Good luck and
best regards
G.M.
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