NikonGear'23

Gear Talk => Lens Talk => Topic started by: Dr Klaus Schmitt on November 16, 2019, 14:40:07

Title: KOLARI new sensor coating to reduce hot spots
Post by: Dr Klaus Schmitt on November 16, 2019, 14:40:07

which quite a few lenses usually show in IR!

https://kolarivision.com/specifications/anti-reflective-coated-glass-reduce-hotspots-glare/ (https://kolarivision.com/specifications/anti-reflective-coated-glass-reduce-hotspots-glare/)

Title: Re: KOLARI new sensor coating to reduce hot spots
Post by: Macro_Cosmos on November 18, 2019, 05:39:59

Quite interesting, I've always suspected the possibility of reducing hotspots with sensor coverglass coatings.

Title: Re: KOLARI new sensor coating to reduce hot spots
Post by: bobfriedman on November 18, 2019, 10:47:27

I always thought the hot spots were due to internal baffles that reflected (non absorbing) in the IR.   try viewing a lens that hot spots in the IR using a macro lens to look inside. I am sure you find shiny baffles.

Title: Re: KOLARI new sensor coating to reduce hot spots
Post by: Dr Klaus Schmitt on November 27, 2019, 23:43:33

Quote from: bobfriedman on November 18, 2019, 10:47:27

I always thought the hot spots were due to internal baffles that reflected (non absorbing) in the IR.   try viewing a lens that hot spots in the IR using a macro lens to look inside. I am sure you find shiny baffles.

Shiny baffles are one reason, but there is more to that...

Title: Re: KOLARI new sensor coating to reduce hot spots
Post by: bobfriedman on November 28, 2019, 02:01:29

Quote from: Dr Klaus Schmitt on November 27, 2019, 23:43:33

Shiny baffles are one reason, but there is more to that...

I am sure there is but I would think they were the dominant scatterer.