jwjensen356

This is somewhat of-topic. While I was cleaning the interior of our KitchenAid oven, I noted that the glass front had 'Schott' etched near its edge. I can add Schott to my B+W filters and probably most of my Zeiss lenses.

rgrenaderphoto Loc: Hollywood, CA

Glass coated with optical filters to block the escape of microwaves is similar to the optical coatings on filters to reduce glare, etc. So, it makes sense.

ken_stern Loc: Yorba Linda, Ca

Got all the following from Wikipedia

Schott AG
In 1884, the glass chemist Otto Schott partnered with the congenial Ernst Abbe, Carl Zeiss and his son Roderich Zeiss, founded the Glastechnisches Laboratorium Schott & Genossen, which would later become Jenaer Glaswerke Schott & Genossen and then Schott AG. Schott developed and manufactured optical glasses for microscopes, telescopes and binoculars. Around 1890 Schott developed borosilicate glass products featuring a low thermal expansion coefficient and high chemical resistance very suitable for laboratory equipment, which was later marketed under the DURAN brand until the equity carve-out of these products to the DURAN Group in 2005. Glass-ceramics with even lower thermal expansion coefficient have been marketed since 1968 as Zerodur for telescope mirrors and other technical applications and Ceran for cooktops.

jwjensen356

This KitchenAid oven is a traditional oven (infrared elements) but we also have a Thermador induction/hybrid range (built by Bosch in Spain). When I read up on it I found that Schott makes the top plate and the glass technique is a spin-off from the space industry.

ken_stern Loc: Yorba Linda, Ca

I'll bet for those applications ---
it's all about:
"lower thermal expansion coefficient"

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

Zeiss owns Schott (which makes fine crystal and specialty glass for industrial applications), B+W, Optilux Architectural Glassworks, Swarovski Optical, to mention a few . . .

They hold a number of patents for coatings and the processes to apply them to glass.

One of their more interesting architectural glazing products is their dichroic glass, and their diffusion-glass sandwich which uses a sandwich of frosted material with a bundle of optical fiber to conduct light from outside to inside. The diffusion sandwich provides relatively even interior lighting levels from an hour or so after sunrise to an hour or so before sunset. Direct sunlight falling on the glass does not appreciably increase indoor light levels. Pretty cool stuff.

I spent a bit of time over the past 3 yrs photographing their projects around the northeast.

Largobob

That would be my guess too. Less thermal expansion = less likely to crack/shatter during heat/cool cycling. Sorta like "Pyrex" glass which can go from fridge to oven without breaking.