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Dear team,
I have a customer which has a requirement to build PAR meter, I do have a few questions:
1. can you please advise if TI has any reference design/APP NOTE about PAR meter?
2. can you please advise if our OPT3002 can be suitable for such a design and if there is any way to separate wavelengths (colors) by a mechanical (non-optical) filter?
Thanks and regards,
Shai
Hi Shai,
I don't see a reference design or app note for a PAR meter.
OPT3002 will give a single value and does not provide a way to separate wavelength. If you were able to place a filter that only exposed the sensor to a single wavelength at a time then you could do this, but the wavelength filtering would have to be done externally. What do you mean by mechanical (non-optical) filter?
Could you provide some detail on what you are trying to measure with OPT3002? Are you trying to measure specific wavelengths or an overall power level?
Best,
Alex
Hi Alex,
Bascily PAR measures Photosynthetically Active Radiation (PAR, in µmol of photons m-2 s-1) very popular in greenhouses application.
Plants use light in the wavelength range from about 400 to 700 nm to drive photosynthesis.
The efficiency with which plants use light varies somewhat across this range so it is important to split and measure specific wavelengths by using multiple OPT3002 devices per the desired wavelengths. see pic below:
the common way to separate wavelengths is by prism but I have read in the below E2E thread that was mentioned color-filters can you please elaborate more about this?
Thanks in advance.
Regards,
Shai