High-Precision Technical Glass & Optical Solutions
ProtoGlass Oy manufactures custom fused silica substrates, high-pressure borosilicate sight glasses, and multi-layer optical windows for industrial and scientific instrumentation across Europe.
±0.02mm
Dimensional Tolerance
λ/10 @ 633nm
Surface Flatness
14 Days
Standard Lead Time
Standard Optical & Technical Glassware
In-stock precision ground glass blanks, optical windows, and high-purity quartz tubing dispatched directly from our Helsinki warehouse.
UV Fused Silica Optical Window
Diameter: 50.8mm, Thickness: 5.0mm. Double-side polished to 20-10 Scratch-Dig for high-power laser applications.
DIN 7080 High-Pressure Sight Glass
Tempered borosilicate disc (100mm × 15mm) engineered for chemical pressure vessels up to 25 bar at 280°C.
Quartz Substrate Wafers (50×50mm)
Ultra-flat quartz wafer substrate (0.5mm thickness). Surface roughness Ra < 0.5nm for lithography & bio-chips.
AR-Coated Single Crystal Sapphire
C-plane sapphire window (Ø25.4mm x 2.0mm) with broadband dual-band anti-reflective coating (400-1100nm).
Bespoke CNC Glass Machining
Equipped with 5-axis ultrasonic CNC milling centres, magnetron sputtering chambers, and automated interferometric metrology.
Ultrasonic CNC Micro-Milling
Sub-millimeter drilling, step grinding, beveling, and complex profiling on brittle borosilicate and quartz without micro-cracking.
Super-Polishing & Planarization
Double-sided CMP polishing achieving angstrom-level roughness (Ra < 0.3nm) and wavefront distortion < λ/10.
Thin-Film PVD Coatings
Anti-reflective (BBAR), dielectric beam splitters, hydrophobic, and conductive ITO thin films deposited in ISO Class 5 cleanrooms.
Zygo® Interferometer Inspection
Every optical flat undergoes strict dimensional verification with calibration certificates provided with each batch.
Have a Custom Glass Drawing?
Upload your CAD (STEP/DXF) or PDF drawing. Our optical fabrication engineers in Helsinki review tolerances and return official quotes within 24 hours.