Description
Factory custom 6mm diameter 800-1100nm wavelength 4mm focal length optical glass aspherical lens
Specifications:
Lens Type: Optical Glass Aspherical Singlet Lens (Molded / Ground & Polished)
Material: N-BK7 (nd=1.5168) / K9 (H-K9L) / N-SF Series / NIR-Low-OH⁻ Glass / Custom
Diameter (Clear Aperture): 6mm (Ø6mm)
Effective Focal Length (EFL): 4mm (Custom 2–100mm available)
Back Focal Length (BFL): Specified per design (typically ~3.2–3.8mm)
Numerical Aperture (NA): ~0.67 (approx., depends on beam clearance)
Center Thickness: 1.0mm – 2.8mm (design dependent)
Dimension Tolerance: ±0.02mm / ±0.05mm
Center Thickness Tolerance: ±0.02mm
Surface Figure (Base Sphere): λ/4 @ 632.8nm
Surface Roughness (RMS): <20nm (Molded) / <5nm (Polished)
Surface Quality (Scratch-Dig): 60-40 / 40-20 / 20-10
Clear Aperture: ≥90% of Ø6mm
Edge Treatment: Ground / Edge Blackened (Optional) / Bevel 0.1mm × 45°
Aspheric Coefficients: Optimized for 800–1100nm band (available on request)
Coating Options:
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Broadband AR 800–1100nm (Ravg<0.5%) ← Standard
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V-Coating @ 850nm / 940nm / 1064nm
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Broadband AR 400–700nm / 600–1050nm (Optional)
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Uncoated (Available)Operating Wavelength: 800–1100nm (NIR Optimized)Transmission: >99% per surface with BBAR coatingOperating Temperature: -40°C to +85°C
Applications:
850nm / 940nm / 1064nm laser diode collimation & focusing
Fiber coupling and free-space NIR micro-optics
Compact NIR imaging and sensor illumination lenses
Biometric / facial-recognition NIR illumination modules
OEM custom NIR laser and photonic modules
Machine vision NIR line/projector optics
R&D prototype NIR beam-shaping systems
We are professional manufacture on the optical lenses &lasers for over 20 years experience.
With the advanteges,we offer optical products in the fileds of University laboratory, Industry, Scientific research,Medical treatment, Mechanical equipments, lasers and Construction industry and so on.
We can provide optical lenses, optical prisms, high-precision Powell prisms, right-angle prisms, laser lenses, filters, aspherical lenses, collimating lenses, optical glass lenses, optical reflectors, cylindrical lenses, laser modules, laser heads, optical glued lenses, optical rod mirrors, etc.
Looking forward to communicating whether we have the opportunity to cooperate. For the lens/laser products you need, I would like to quote our competitive price.
Please contact for any custom needs,
Contact:Rebecca Xu
