‌Lens substrate‌: Fused silica (SiO₂) or N-BK7 optical glass for high laser damage threshold (10-15 J/cm² @1064nm).
‌Coatings‌: Multi-layer AR coatings (R<0.25% per surface) optimized for common laser wavelengths (e.g., 355nm, 532nm, 1064nm).
‌Mounting‌: Anodized aluminum or titanium barrels for thermal stability.

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2. Key Properties‌

‌Surface accuracy‌: λ/10 wavefront distortion for diffraction-limited performance.
‌Focal length‌: 10-500mm with ±1% tolerance (telecentric options available).
‌Aperture‌: f/1.4 to f/8 with <0.1% spherical aberration.
‌Temperature range‌: -50°C to +300°C (coefficient matched to laser systems).

‌3. Core Functions‌

‌Beam shaping‌: Converts Gaussian beams to flat-top profiles for uniform energy distribution.
‌Spot size control‌: Achieves micron-scale focal spots (e.g., 5μm @532nm).
‌Collimation‌: Corrects divergence in fiber-coupled laser systems.

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4. Applications‌

- ‌Laser cutting/welding‌: Focuses high-power CO₂/YAG lasers (1-6kW).
- ‌Medical lasers‌: Used in ophthalmology (LASIK) and dermatology devices.
- ‌LIDAR systems‌: Optimizes signal-to-noise ratio in automotive/industrial scanners.

Item	Optical Convex Focusing Lens
Material	Optical glass, Qurartz glass, Pyrex, borosilicate glass, Float glass
Diameter Tolerance	+0/-0.2 mm
Thickness Tolerance	+/-0.2 mm
Processed	by grinding, polishing
Surface Quality	80/50,60/40
Material Quality	no scratches and air bubble
Transmission	above 90%
Chamfer	0.1-0.3 mm x 45 degree
Surface Coating	Available
Usage	Photography, Lighting system, Electronic apparatus

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