Our Process on Mirror Blanks
Discover our glass disc processing services, including roughing, annealing, drilling, grinding and grinding. Trust our experience to achieve flawless results for your optical projects. We are able to do several type of working on our production or customer provided blanks, up to 32 inches (810mm) in diameter, and up to 5" (130mm) in thickness.



Processes that we can carry out on our blanks or on blanks supplied by the customer
- Flattening surfaces
- Rough grinding: concave shape with price
- Conical shape
- Center hole
- Edge rectfied
- Rough grinding: convex shape with price
- Annealing
- Grinding service
Flattening surfaces
Some blanks like Suprax arrive with two wavy surface, we are able to remove wavy so you have two parallel flat surface

Rectified edges
All blanks obtained with water-jet cutting have a shape that is not perfectly cylindrical and circular. Our rectified edges service grinding service removes these inaccuracies and allows, when required, perfectly centered drillings.

Rough grinding: concave shape
This pre-generated shape to request radius.
We suggest to start grinding with grit 180/220 after our rough grinding and remove at least 250 microns before to polish.
Standard tolerance on radius/focal length is 1%
Curve generating service preice is refer to our blank , please ask us a quotation to work your blank.
Price are Vat and delivery cost excluded

curve generating service - concave surface
Diameter mm/inch | F / 3.0 - 3.99 Euro | F / 4.0 - 4.99 Euro | F / 5.0 - 5.99 Euro |
---|---|---|---|
255 / 10" | 33,- | 31,- | 29,- |
305 / 12" | 39,- | 35,- | 32,- |
355 / 14" | 45,- | 40,- | 38,- |
410 / 16" | 62,- | 55,- | 55,- |
460 / 18" | 75,- | 66,- | 60,- |
510 / 20" | 96,- | 86,- | 80,- |
610 / 24" | 142,- | 132,- | 125,- |
710 / 28" | 188,- | 175,- | -- |
760 / 30" | 252,- | 30,- | 210,- |
810 / 32" | 294,- | 270,- | -- |
Rough grinding: convex shape
This pre-generated shape to request radius .
We suggest to start with grit 180/220 and remove at least 250 micron before to polish.
Standard tolerance on radius/focal length is 1%
Curve generating service price is refer to our blank , please ask us a quotation to work on your blank.
Price are Vat and delivery cost excluded.

curve generating service - convex surface
Diameter mm/inch | F / 3.0 - 3.99 Euro | F / 4.0 - 4.99 Euro | F / 5.0 - 5.99 Euro |
---|---|---|---|
255 / 10" | 42,- | 40,- | 38,- |
305 / 12" | 49,- | 45,- | 41,- |
355 / 14" | 62,- | 58,- | 55,- |
410 / 16" | 78,- | 72,- | 66,- |
460 / 18" | 93,- | 85,- | 79,- |
510 / 20" | 125,- | 116,- | 108,- |
610 / 24" | 165,- | 152,- | 142,- |
710 / 28" | 235,- | -- | -- |
810 / 32" | 330,- | -- | -- |
Rough grinding: conical shape
On convex surface we can reach maximum radius 800mm

Center hole
We can make the central hole from 10mm diameter up to 250mm on Cassegrain Telescope configuration.

Annealing service
we can perform fine annealing up to 32″ in diameter on borosilicate glass with our annealing ovens

Grinding service
Upon request, after the roughing service it is possible to proceed with grinding service up to grain 320 grit or up to 800 with the mirror ready for polishing.