Lagrafi 138 glass thickness

[Andrea Gazzoni]

Just got this Lagrafi 138 pin registration carrier for 5x7 film, came without glasses.
Anyone has a similar piece and can measure the thickness of each glass?
I am getting a reading of 3mm for the bottom glass to have the negative sit flush with the pins.
Upper glass which will be AN or antireflection glass, I can't get a precise reading, should be about 2mm, not sure as that puts some strain on the glass holding tabs.
Thank you for your help

[gary mulder]

The Lagrafi uses the same glas as the Durst Trineg. Durst called it Reglas 139 (AN). It has a thickness of 2,8 mm

213969

[Andrea Gazzoni]

Thank you Gary, same thickness for both glasses?

[gary mulder]

Thank you Gary, same thickness for both glasses?

Yes, I also attached a Photo.

[Andrea Gazzoni]

thank you very much, now in search of the original glass, I inquired for some custom sized optical glass, but the dimensional tolerance is + -1mm, which may be fine for length and height, but less for thickness

[koraks]

thank you very much, now in search of the original glass, I inquired for some custom sized optical glass, but the dimensional tolerance is + -1mm, which may be fine for length and height, but less for thickness
You may want to verify this with the seller. +/-1mm tolerance for glass thickness doesn't make sense. For L and W I could see it (although it's kind of an outdated tolerance given today's cutting methods), but for thickness it would be even worse than hand made Medieval glass dug up on Time Team.