Sapphire's mechanical, optical, electrical, chemical and nuclear properties combined with Valley Design's ability to thin this material to ultra-thin dimensions, makes it an exceptional material for a multitude of critical applications.
When polishing sapphire, the optical scratch/dig figures above relate approximately to microinches or Angstroms Ra in the following common notations:
| Scratch/Dig | Angstroms Ra | Microinches Ra |
| 10/5 | 10A | .040u" |
| 20/10 | 20A | .080u" |
| 40/20 | 30A | .12u" |
| 60/40 | 40A | .16u" |
| 80/50 | 50A | .2u" |
Note: Surface finishes for Fused Silica and glass are approx. 1/2 the value in angstroms or microinches as outlined above for Sapphire.
Return to Home Page Optical polishing, lapping, dicing and optical components polishing
Updated: 27 September 2008
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