N-BK7 Anti-Reflective Rhombic Prism - China Suppliers and Factory for Laser Applications

1. Core Functions

● Beam Control

• Parallel Beam Displacement: Monolithic rhombic design achieves zero angular deviation with 1–50mm lateral shift (customizable);
• Anti-Reflection: Dual AR coatings (350–1700nm) with <0.2% reflectivity per surface;

● Structural Advantages

• Cement-Free: Eliminates adhesive-induced ghosting/interference;
• Protected Coatings: Internalized AR layers resist abrasion and chemicals (H₂O₂, acid).

2. Technical Specifications

● Optics

• Material: N-BK7 glass (nd=1.5168 @587.6nm), transmission >92% @400–1600nm;
• Surface accuracy: <λ/10 PV @633nm, angle tolerance ±30 arcsec;
• OPD: <λ/8 for distortion-free imaging;

● Coatings

• Standard AR: <0.5% reflectivity @400–1600nm (both sides);
• Custom Wavelengths: UV (250–400nm) or mid-IR (2–5μm) AR;
• Ultra-Broadband AR: <0.3% average reflectivity @350–2000nm;

● Mechanics

• Size range: 10×10×10mm to 100×100×50mm;
• Chamfer: 0.2mm×45° edges, shock-resistant >10G;
• Mounts: SM2 (2.0"-32) threads or custom holders.

3. Applications

● Laser Systems

• Laser cavity alignment with <5μm beam positioning;
• Femtosecond pulse compressors compensating <5fs² GDD;

● Optical Metrology

• Michelson interferometer reference arms (<1nm path stability);
• Machine vision multi-angle beam splitting (0°–60° incidence);

● Biomedical Imaging

• Confocal microscope beam steering, eliminating stray light;
• OCT systems with >10dB SNR enhancement.

4. Customization

● Specialized Designs

• Large prisms (>150mm edge) with <λ/20 surface accuracy;
• High-power laser compatibility (>10kW/cm² CW), LIDT >5J/cm² @1064nm, 10ns;

● Integrated Solutions

• Embedded piezo stages (PZT) for ±10nm displacement;
• Multi-prism stacks (e.g., dual rhombic) for cascaded beam shifting.