0.2x3.9 mm N-BK7 Aspheric Lens, AR Coated

N-BK7 aspheric concave lens for 0.4-3 μm applications, customizable sizes, high surface quality, and OEM/ODM support.

Core attributes

Material: N-BK7
Shape: Aspheric
Diameter: 0.2 mm
Focal Length: 3.9 mm
Surface Quality: 60/40
Coating: anti-reflective (AR)
Transmission bands: SWIR (1.7-3 μm), NIR (0.7-1.7 μm), VIS (400-700 nm), UV (<400 nm)

Product description

This N-BK7 aspheric concave lens is designed for diverse optical applications across multiple wavelength bands, including 0.4-3 μm. With a focal length of 3.9 mm and a clear aperture of over 95%, this lens ensures high performance in imaging and laser systems. Its surface quality rating of 60/40 guarantees effective light transmission, making it suitable for applications in IR imaging, LIDAR, and machine vision. Custom sizes and coatings are available to meet specific project needs.

Key Features

Wavelength compatibility: Operates across 0.4-3 μm bands for versatile applications.
High surface quality: 60/40 rating ensures effective light transmission.
Customizable dimensions: Available in various sizes, including 0.2 mm diameter.
OEM/ODM support: Tailored solutions to fit specific project requirements.
Lightweight design: Weighs only 0.5 grams for easy integration.

Available Sizes

Diameter x Focal Length (mm)
0.2 x 3.9

Specification Summary

Item	Value
Material	N-BK7
Shape	Aspheric
Diameter	0.2 mm
Focal Length	3.9 mm
Surface Quality	60/40
Coating	anti-reflective (AR)
Transmission bands	SWIR (1.7-3 μm), NIR (0.7-1.7 μm), VIS (400-700 nm), UV (<400 nm)

Full Specifications

Parameter	Value
Type	Concave Lens; cylindrical lenses
Customized Support	OEM, ODM, OBM
Warranty	3 Years
Weight	0.5
Length	6mm-145mm
Flatness	1/4lambda
Clear Aperture	95%

FAQ

Can I get custom sizes?

Yes, the lens is available in various sizes, including a diameter of 0.2 mm.

What are the tolerances for this lens?

Focal length tolerance is ±1%, thickness tolerance is ±0.2 mm, and diameter tolerance is +0.0/-0.1 mm.