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--- thermalsensors [2020/05/05 00:46]
wf68spef
+++ thermalsensors [2020/06/27 13:48]
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   * Cheap PIR thermal transparent windows: https://www.kube.ch/produkte/pir-optics/pir-fenster/
-Bought for testing:
-  * Germanium: https://de.aliexpress.com/item/32958470241.html
 ==== Test thermal transparancy of materials ====
+** Lepton 3.0 Germanium Lens**
+Bought here: https://de.aliexpress.com/item/32958470241.html
+* Transmission of lens
+{{::germaninumglas.jpg?600|}}
+* Without lens
+{{::0_latest_without.png?600|}}
+Intensity of hottest point: 210
+* With lens
+{{::0_latest_with_GLAS.png?600|}}
+Intensity of hottest point: 124
+The lens dampens the intensity of the heat by at least ~40%, whis is roughly in line with the chart above.
+It also created a lens center spot effect in the center of the image. We need to see if this might cause problems.
+To be tested in real life conditions.
 **Test different materials for thermal transparancy with Lepton 3.0 @ Pi4**