Please tell us what you are trying to do. You seem to have had very little experience with spectroscopy and in particular infrared. I do not have time to go through every word with you.

Yes you are correct I am novice, I don't have experience in anything.

I have redrawn simple form of my model for better understanding of members, hope it helps.

Please note these shutters are mechanically operated.
I have removed optical link with open air
These filters are drawn in Lens shape but they are not really Lens.

I am open to suggestion

 

Some filter specs are given here, for example.

spec of FB2300-50
1. CENTER WAVELENGTH (CWL): 2.30 µm ± 12 nm
2. FULL WIDTH HALF MAXIMUM (FWHM): 50 ± 10 nm
If i read it correctly it passes band of wavelength 24 nm wide with wavelength peak at 2.3 µm

On another note they are really pricey $331

 

If i read it correctly it passes band of wavelength 24 nm wide with wavelength peak at 2.3 µm

My understanding is that it passes a band centred on 2.3um (uncertainty12nm) with a bandwidth (measured to the half peak height) of 50nm (uncertainty10nm).
And yes, it's expensive: which is probably why modulation has been suggested above as a more viable option.

 

Why not an optoisolator then?

 

spec of FB2300-50
1. CENTER WAVELENGTH (CWL): 2.30 µm ± 12 nm
2. FULL WIDTH HALF MAXIMUM (FWHM): 50 ± 10 nm
If i read it correctly it passes band of wavelength 24 nm wide with wavelength peak at 2.3 µm

On another note they are really pricey $331

Do you understand the difference between um and nm? A wavelength of 2.3 um is at the beginning of what is considered the "finger print" region of the infrared spectrum.



That is not what you want according to your original post.

 

Do you understand the difference between um and nm? A wavelength of 2.3 um is at the beginning of what is considered the "finger print" region of the infrared spectrum.

View attachment 211103

That is not what you want according to your original post.

Yes I understand, 2.3 um can not be detected by PT333-3C as its Rang of Spectral Bandwidth is λ0.5 --- 400-1100 --- nm

I was just trying to clarify.