- #1
jagadeeshr
- 11
- 0
Hi,
I need some help to calibrate argon spectrum.
I have a MicroLab Spectrometer (Model 141) to obtain spectral images of argon plasma. To calibrate the spectral images, I need a reference of known wavelength.
Usually, a discharge tube is used to obtain the reference spectrum. However, I cannot procure it now due to budget issues.
Another method is to is to fill a vial with chemical of known absorption/transmittance wavelength, and place it in the spectrometer. The wavelength at which the liquid absorbs or transmits light can be used as a references to calibrate the unknown spectrum.
Can you suggest any chemical that absorbs or transmits light in the visible range (400 to 700 nm)?
I could only think of chlorophyll. Maximum absorption at 430 & 662 nm for chlorophyll a and 453 & 642 nm for cholorophyll b.
http://www1.biologie.uni-hamburg.de/b-online/e24/3.htm
Thank you
Jagadeesh
I need some help to calibrate argon spectrum.
I have a MicroLab Spectrometer (Model 141) to obtain spectral images of argon plasma. To calibrate the spectral images, I need a reference of known wavelength.
Usually, a discharge tube is used to obtain the reference spectrum. However, I cannot procure it now due to budget issues.
Another method is to is to fill a vial with chemical of known absorption/transmittance wavelength, and place it in the spectrometer. The wavelength at which the liquid absorbs or transmits light can be used as a references to calibrate the unknown spectrum.
Can you suggest any chemical that absorbs or transmits light in the visible range (400 to 700 nm)?
I could only think of chlorophyll. Maximum absorption at 430 & 662 nm for chlorophyll a and 453 & 642 nm for cholorophyll b.
http://www1.biologie.uni-hamburg.de/b-online/e24/3.htm
Thank you
Jagadeesh
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