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Double Convex Lens

Core Features
● Dual Convex Surfaces
Symmetrical design enables bidirectional focusing and collimation, ideal for wide-beam or multi-directional laser systems.

●Low Aberration Performance
Minimizes spherical and chromatic aberrations, optimized for multi-wavelength compatibility (UV to IR).

●High Power Tolerance
Crafted from fused silica, N-BK7, or ZnSe, with AR/HR coatings to withstand high-energy lasers (e.g., Nd:YAG, CO₂).

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Key Applications in Laser Technology

✅ Beam Expansion & Collimation
Expand or collimate laser beams while maintaining symmetry, critical for LiDAR and interferometry systems.
✅ Optical Imaging
Focus polychromatic light sources in laser spectroscopy or medical imaging devices.
✅ Fiber Coupling
Achieve efficient coupling between lasers and optical fibers with <0.2 dB insertion loss.
✅ Laboratory Research
Build versatile optical setups for laser plasma studies or nonlinear optics experiments.

Detailed Technical Specifications of Double Convex Lenses

Parameter Category	Parameter	Specification Details	Test Standard/Notes
Basic Parameters
Material	Available Options	N-BK7, Fused Silica, ZnSe, Ge (Germanium)	Selected by wavelength: N-BK7 (visible), Fused Silica (UV-IR), ZnSe/Ge (mid-far IR)
Design Wavelength	Standard Wavelength	Customizable: 193 nm (UV), 532 nm, 1064 nm, 10.6 μm (IR)	Default design at 632.8 nm
Focal Length Range	Standard Focal Length	10 mm – 500 mm (customizable up to 1000 mm)	Tolerance: ±1%
Diameter Range	Standard Diameter	5 mm – 100 mm (extendable to 150 mm)	Tolerance: ±0.1 mm
Optical Performance
Surface Accuracy	Surface Figure (PV)	<λ/2 @632.8 nm (standard) Optional λ/4 (high precision)	ISO 10110-5
Surface Quality	Scratch-Dig	60-40 (standard) 40-20 (high-grade)	MIL-PRF-13830B
Transmission	Uncoated (Substrate)	N-BK7: >92%@400-700 nm Fused Silica: >95%@200-2000 nm ZnSe: >70%@2-12 μm	Tested by spectrophotometer
Coating Performance	AR Coating	Reflectivity: R<0.5%@specified wavelength (e.g., 1064 nm, 10.6 μm)	Single/multi-layer coatings available
	HR Coating	Reflectivity: R>99%@specified wavelength	Ideal for laser cavities
Damage Threshold	Pulsed Lasers (10 ns pulse)	Fused Silica: 5 J/cm²@1064 nm ZnSe: 1 J/cm²@10.6 μm	Tested per ISO 21254
Geometric Parameters
Radius of Curvature	Single Surface (R1/R2)	Symmetric design: R1 = R2 (standard) Asymmetric customization (R1 ≠ R2) available	Tolerance: ±0.5%
Center Thickness	Thickness Range	2 mm – 20 mm (adjusted based on diameter and focal length)	Tolerance: ±0.05 mm
Edge Thickness	Minimum Edge	≥1 mm (ensures mechanical strength)	Customizable upon request
Mechanical & Environmental
Thermal Expansion	Material Property	N-BK7: 7.1×10⁻⁶/℃ Fused Silica: 0.55×10⁻⁶/℃ ZnSe: 7.9×10⁻⁶/℃	Suitable for wide temperature ranges
Operating Temperature	Standard Range	-50°C to +300°C (Fused Silica) -50°C to +150°C (ZnSe)	High-temperature coatings available
Water/Dust Resistance	Protection Level	IP54 (standard) Optional IP67 (harsh environments)	Compliant with IEC 60529
Certifications & Standards
Quality Standards	Production System	ISO9001 certified MIL-PRF-13830B optical inspection	Full traceability
Environmental Compliance	Material Compliance	RoHS, REACH (lead-free, cadmium-free)	Supports medical/biocompatibility requirements

Parameter Notes

1.Transmission vs. Wavelength: Materials optimized for specific bands, e.g., ZnSe for mid-IR CO₂ lasers (10.6 μm).

2.Coating Customization: Multi-wavelength AR coatings (e.g., 1064 nm + 532 nm) reduce system complexity.

3.High Damage Threshold: Fused Silica for high-energy pulsed lasers; ZnSe requires power density limits.

4.Non-Standard Designs: Supports asymmetric curvature, ultra-thin edges (<1 mm), large apertures (>150 mm).

All specifications are validated by third-party reports (e.g., SGS, CNAS) for transparency and reliability.

Application-Specific Recommendations

Industrial Laser Cutting: Fused Silica + AR@1064 nm, 50 mm focal length, high-temperature design.
Medical Fiber Coupling: N-BK7 + dual-band AR coating (1064 nm & 532 nm), low insertion loss.
Space Optical Communication: Lightweight design (thin lenses), IP67 protection.

Why Choose LENSES-OPTICAL?

Symmetry-Optimized Design: Balanced curvature reduces off-axis aberrations for wide-angle applications.
Broadband Compatibility: Supports wavelengths from 193 nm (UV) to 10.6 μm (IR).
Rigorous Testing: Each lens meets ISO 10110 standards for surface quality and durability.

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Industries: Aerospace | Biomedical Imaging | Quantum Optics | Industrial Lasers

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