Metals are not an easy materials to polish, or to obtain extreme optical specifications with.
By using advanced chemical polishing techniques, and the latest test equipment LBP have reached the physical limits possible with many metals such as copper, aluminium, and semiconductors materials such as silicon.
Specifications vary with the size of mirror, but can be confirmed at point of order. Many mirrors are made to customer drawings when the agreed specifications will be met.
By using typical specifications wherever possible
parts will be the most cost effective.
|
Specification |
Typical |
Best |
Comments |
|
Diameter |
+0/-0.12 |
+/-0.005mm |
Imperial Tolerances also Accepted. |
|
Thickness |
+0/-0.12 |
+/-0.01mm |
|
|
Chamfers |
0.4-0.6mm |
n/a |
n/a |
|
Parallelism |
3 arc mins |
25 arc secs |
n/a |
|
Flatness(pwr) |
1/2 wave vis |
0.1 wave vis |
Interferometer certificated |
|
Flatness(irreg) |
1/4 wave vis |
0.1 wave vis |
|
|
Clear Apeture |
90% of Diameter |
100% |
n/a |
|
Polish Quality |
20-10 Scratch/dig |
Better than 10/5 |
Subjective test |
|
Surface Roughness |
5nm Ra |
1nm Ra |
Zygo measured |
|
Reflectivity Gold |
98.8% |
99.1% |
@10.6 Microns |
|
Reflectivity Max R |
98.85% |
99.94% |
|
|
Phase Shift Gold |
0.5 degree |
n/a |
|
|
Phase Retarder |
90+/- 3 deg |
90+/- 1 deg |
|
|
CW Damage |
4000W/mm |
n/a |
see website |
|
Pulsed Damage |
46.7 J/cm2 |
n/a |
80ns pulse |
|
Max Power(gold) |
40KW+ |
n/a |
Limit not known |
|
Largest Diameter |
150mm |
n/a |
n/a |
|
Smallest Diameter |
5mm |
n/a |
n/a |
Laser Beam Products offer
Laser Mirrors & Optics ZnSe laser lenses, ZnSe laser optics, CO2 laser
mirrors, Infra Red optics, Copper mirrors, Aluminium mirrors, silicon
mirrors, Molybdenum mirrors, beam expanders, phase retarding mirrors,
Potassium Chloride (KCl) windows, gold coated mirrors, beam delivery
optics, gold coated copper mirrors, reflectors for industrial cutting and
welding.
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