Precision Applied Products
355-B W. Crowther Ave.
Placentia, CA 92870
Telescope Diagonals
Get Your Diagonals From Us Today!
Made From Precision Annealed Pyrex, Fused Silica Or Zerodur
Diagonal Minor Axis Up To 8"
Diamond generated substrates. True 45 degree elliptical diagonal. 1/20th wave RMS.
Coated with Enhanced Aluminum and overcoated with hard Silicon Dioxide with Reflectance of 95% average in the visible.
Minor Axis | Substrate Material | Price | Substrate Material | Price | Substrate Material | Price |
|---|---|---|---|---|---|---|
1.0" | Pyrex | $55.00 | Fused Silica | $85.00 | Zerodur | $90.00 |
1.32" | Pyrex | $75.00 | Fused Silica | $110.00 | Zerodur | $120.00 |
1.52" | Pyrex | $95.00 | Fused Silica | $140.00 | Zerodur | $150.00 |
1.83" | Pyrex | $135.00 | Fused Silica | $185.00 | Zerodur | $195.00 |
2.14" | Pyrex | $180.00 | Fused Silica | $240.00 | Zerodur | $255.00 |
2.60" | Pyrex | $230.00 | Fused Silica | $295.00 | Zerodur | $315.00 |
3.10" | Pyrex | $350.00 | Fused Silica | $335.00 | Zerodur | $350.00 |
3.50" | Pyrex | $465.00 | Fused Silica | $525.00 | Zerodur | $560.00 |
4.0" | Pyrex | $825.00 | Fused Silica | $965.00 | Zerodur | $995.00 |
4.25" | Pyrex | $1250.00 | Fused Silica | $1475.00 | Zerodur | $1525.00 |
4.50" | Pyrex | $1360.00 | Fused Silica | $1595.00 | Zerodur | $1675.00 |
4.75" | Pyrex | $1490.00 | Fused Silica | $1695.00 | Zerodur | $1750.00 |
5.00" | Pyrex | $1625.00 | Fused Silica | $1775.00 | Zerodur | $1895.00 |
Custom Size up to 8" Minor Axis | Pyrex | Quote | Fused Silica | Quote | Zerodur | Quote |
Delivery from stock or in the case of larger minor axis and custom we can delivery in approximately 5 weeks from blank to coated mirror.
Information about the different materials
- Pyrex
- Fused Silica
- Zerodur
Zerodur is a glass ceramic that Schott developed for optical, opto-electronic and precision engineering applications. Zerodur is an inorganic, non-porous material which has a crystalline phase and a glassy phase. This results in an extremely low thermal expansion which in certain temperature ranges can even be zero or slightly negative.
Zerodur is a material of the highest homogeneity, and even in large pieces with dimensions of several meters displays thermal and mechanical characteristics with nearly unmeasureable deviations.
Extreme low coefficient of expansion at 0.050 x 10-6/K
This material takes an excellent polish to extremely smooth surface roughness below 1 nm RMS