3mm diameter 3.2mm focal length aspheric lens 0.37mm numerical aperture optical glass aspherical lens

3mm diameter 3.2mm focal length aspheric lens 0.37mm numerical aperture optical glass aspherical lens

Optical Aspherical Lens

3mm diameter aspherical lens

custom aspherical glass lens

factory offer optical aspheric lens

Ultra-compact high-precision aspherical singlet lens made from N-BK7 or K9 optical glass, with 3mm clear aperture, 3.2mm effective focal length and numerical aperture ~0.37, specially designed for small-form-factor laser diode collimation and focusing.

The aspheric profile eliminates spherical aberration and delivers a smaller spot size with higher coupling efficiency than equivalent spherical lenses. Optimized for visible or NIR wavelengths (405/635/650/808/850/940nm V-coat or BBAR available).

Ideal for miniature laser modules, pointer optics, biometric illumination, and OEM micro-optical assemblies.

Description

Specifications:

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

Material: N-BK7 (nd=1.5168) / K9 (H-K9L) / High-Index Crown (Custom)

Diameter (Clear Aperture): 3mm (Ø3mm)

Effective Focal Length (EFL): 3.2mm (Custom 1.5–50mm available)

Back Focal Length (BFL): Specified per design (typically ~2.5–3.0mm)

Numerical Aperture (NA): 0.37 (Standard) / Custom NA per EFL & Clear Aperture

Center Thickness: 0.8mm – 2.2mm (design dependent)

Dimension Tolerance: ±0.02mm

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 Ø3mm

Edge Treatment: Ground / Edge Blackened (Optional) / Bevel 0.05mm × 45°

Aspheric Coefficients: Optimized per wavelength band (available on request)

Coating Options:

V-Coating @ 405nm / 532nm / 635nm / 650nm / 808nm / 850nm / 940nm / 1064nm
Broadband AR 400–700nm / 600–1050nm (Optional)
Uncoated (Available)

Operating Wavelength: VIS / NIR (Custom per application)

Transmission: >99% per surface with AR / V-Coat

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