02-03-2023, 09:49 PM
There are several optical coating services for amateur telescope makers who should be able to strip and re "silver" your mirrors. Actually they don't call it"silvering" anymore since the use high performance coatings. Search using "telescope mirror coating service" Two that pop up in USA are Magestic-coatings and OWL (Optical Wavelength Labs)
I have not used any of these services personally so I have no direct experience. It just seems like a logical place to start. They are used to working to the highest optical standards with customers who create their own astronomical telescope mirrors so they should be able to handle a sextant mirror. A common complaint is most are not fast turn around.
Another place to look for information might be the forum "Cloudy Nights" for amateur telescope makers (ATM's)
Hope this helps. Let us know what you find.
It might also be possible to make replacement mirrors from standard mirror stock. That would depend on how fussy you want to be about the final accuracy. Standard mirror stock is made from float glass which these days is pretty good, optically speaking. I did that for a not-so-pretty Simex sextant I had aquired cheaply and it worked out fine.
PeterB
I have not used any of these services personally so I have no direct experience. It just seems like a logical place to start. They are used to working to the highest optical standards with customers who create their own astronomical telescope mirrors so they should be able to handle a sextant mirror. A common complaint is most are not fast turn around.
Another place to look for information might be the forum "Cloudy Nights" for amateur telescope makers (ATM's)
Hope this helps. Let us know what you find.
It might also be possible to make replacement mirrors from standard mirror stock. That would depend on how fussy you want to be about the final accuracy. Standard mirror stock is made from float glass which these days is pretty good, optically speaking. I did that for a not-so-pretty Simex sextant I had aquired cheaply and it worked out fine.
PeterB