6mm diameter 12mm focal length center 2.5mm thick optical lens aspherical lens

6mm diameter 12mm focal length center 2.5mm thick optical lens aspherical lens

Optical Aspherical Lens

custom 6mm diameter aspherical lens

custom aspherical glass lens

factory offer optical aspheric lens

High-precision optical glass aspherical singlet lens with 6mm clear aperture, 12mm effective focal length (f/2), and center thickness 2.5mm (design-specific).

Fabricated from N-BK7 or K9 crown glass with optimized aspheric profile to eliminate spherical aberration and improve spot quality compared to plano-convex spherical lenses.

Suitable for compact visible or NIR imaging, laser diode collimation, condenser optics, and OEM micro-optical modules. Broadband AR coating 400–700nm or V-coat at laser wavelengths available. Custom glass type, NA, and conjugate distance supported.

Description

6mm diameter 12mm focal length center 2.5mm thick optical lens aspherical lens

Specifications:

Lens Type: Optical Glass Aspherical Singlet Lens (Molded / Ground & Polished)

Material: N-BK7 (nd=1.5168, νd=64.2) / K9 (H-K9L) / D-ZK3 / Custom Low-Dispersion Glass

Diameter (Clear Aperture): 6mm (Ø6mm)

Effective Focal Length (EFL): 12mm (Custom 5–100mm available)

Back Focal Length (BFL): Specified per design (typically ~10–11.3mm for EFL=12mm)

Center Thickness: 2.5mm (Design Value) / Custom ±0.02mm

Numerical Aperture (NA): ~0.23–0.27 (depends on beam clearance)

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 per wavelength band (available on request)

Coating Options:

Uncoated
MgF₂ AR @ 550nm
Broadband AR 400–700nm (Ravg<0.5%)
Broadband AR 600–1050nm (VIS-NIR)
V-Coating @ 532nm / 635nm / 850nm / 940nm / 1064nm / Custom

Operating Wavelength: 400–700nm (VIS Standard), 350–2200nm (Substrate Dependent)

Transmission: >99% per surface with AR coating

Operating Temperature: -40°C to +80°C

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