brankop
Member
Ranchu
Veteran
Lovely, thank you! Do you have others?
02Pilot
Malcontent
I applaud your effort in conducting this test. If it's not too much to ask, could you give a bit more information on the test itself, as well as some analysis of the results? My understanding of the information you have provided is, sadly, somewhat limited by my ignorance of the science involved. Thanks very much.
brankop
Member
RE: test details
First a disclaimer might be in order: I do not have a formal education in Optics, so my test might be incorrect.
I minimally modified a test that is described in a book named “Introduction to Optical Testing” by Joseph M. Geary (pg 15). You can find it at Google books. Mr. Geary shows how to measure the lens transmission, but I added a spectrometer to the test, so the spectral transmission can be measured.
For the collimated light source I used Xenon light, a concave mirror and 50/50 beamspliter. My integration sphere has larger entrance port then one depicted in the book, so I did not need to use a concave mirror to collect light when lens is removed. I used a spectrometer made by Ocean Optics which measures spectrum from 200-1100 nm.
Best,
B.
First a disclaimer might be in order: I do not have a formal education in Optics, so my test might be incorrect.
I minimally modified a test that is described in a book named “Introduction to Optical Testing” by Joseph M. Geary (pg 15). You can find it at Google books. Mr. Geary shows how to measure the lens transmission, but I added a spectrometer to the test, so the spectral transmission can be measured.
For the collimated light source I used Xenon light, a concave mirror and 50/50 beamspliter. My integration sphere has larger entrance port then one depicted in the book, so I did not need to use a concave mirror to collect light when lens is removed. I used a spectrometer made by Ocean Optics which measures spectrum from 200-1100 nm.
Best,
B.
semilog
curmudgeonly optimist
Nifty! Does your spectrophotometer go further into the IR?
brankop
Member
Spectrometer itself is capable to measure up to 1100 nm. Unfortunately there are several limitations in my setup that prevent measuring above 740nm. One of them is optical fiber that is rated only for visible light.