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PRODUCTION

Semi-finished products:

• Sapphire boules
• round plates, square plates, rods: sawn or fine ground


Precision parts (already polished):

• Windows, diameter up to 300 mm
• Square plates
• Lenses
• Micro lenses
• Balls
• Domes
• Step windows
• Prisms
• Tubes, capillaries, rods
• Flat substrate


                


Our manufacturing methods:

• Sawing
• Fräsen
• Drilling
• Ultrasonic machining
• Grinding
• Centering
• Lapping
• Polishing
• Matting
• Merging


Extras:

• AR coating
• Mirrors
• Surface metallization
• Annealing


Tolerances:

 
Standard tolerances
 
Best possible tolerances

• Measurement tolerances:
up to 5 mm: +/- 0,05 mm
above 5 mm: +/- 0,1 mm

• Surface quality of polished areas:
up to 3 Rauten according to DIN 3140
or up to Ra 0,1µ
or 5/3x0,25 according to DIN 3140 (scratch/dig 80/50)

• Parallelism: < 1 arcmin

• Planarity: 2 Lambda at 633 nm / 25 mm-range

• Orientation: all kind of orientation
in Toleranzen bis +/- 3°

• Chamfer: 0,2-0,3 mm/45°
(otherwise chips up to 0,2 mm)


• Measurement tolerances:
+/- 0,01 mm and better


• Surface quality of polished areas:
up to 4 Rauten according to DIN 3140
or up to Ra 0,01µ
or 5/4x0,025 according to DIN 3140 (scratch/dig 10/5)

• Parallelism: < 10 arcmin

• Planarity: Lambda/10 at 633 nm / 25 mm-range

• Orientation: all kind of orientation
in Toleranzen bis +/- 1°

• Chamfer: 0,05 mm/45°
(sharp edges)

 

 
GWI Sapphire — Birkenstr. 5 — D-91287 Plech