InfraRed pass for Glass

[AlistairW]

Hello,

I am in the process of building a cloud sensor, and have managed to get one of these sensors working:

https://www.robotshop.com/uk/phidgettemperaturesensor-usb-ir-temperature-sensor.html?gclid=EAIaIQobChMIqOqCr4Pa2AIV5grTCh3UwgbBEAQYASABEgJP2PD_BwE

I have housed it in an acrylic case, but the issue I have is the sensor is at the bottom of a barrel, and is open to the atmosphere. I was thinking of using a microscope slide cover to place over the top to protect it from rain etc., but then I read that glass blocks IR. Ultimately I guess I need to experiment to see what works, but anyone have any ideas on materials that allow IR to be transmitted ?

Thanks

Alistair

[Merlin66]

Glass is OK. It will pass the IR.

We use glass lenses in our spectroscopes and record into the IR - no problems.

 

[AlistairW]

Thanks for this I will give it a try - it appears the band I am trying to pass is .... (The 1045 Phidget Temperature Sensor IR uses long wavelength infrared (5.5 to 14 µm).

[Astrobits]

You could have a look at this site:

https://www.edmundoptics.com/resources/application-notes/optics/the-correct-material-for-infrared-applications/

Nigel

[Shibby]

I've been looking at doing something similar and decided it'd probably be a good idea to heat the enclosure to prevent dew forming on the window and causing false readings.

[AlistairW]

Not thought of that - thanks