LBTEK-Your Trusted Partner For Optoelectronic Experiments!

Product Description

Optical Material: N-BK7
Operating Wavelength: 350 nm-2.0 μm (uncoated)
Application: Imaging, beam expansion or reduction

Double-concave lenses feature two concave surfaces with equal radii of curvature and provide a negative focal length. They are typically used for beam collimation, focal length adjustment, or image reduction/expansion. N-BK7 is one of the most commonly used optical materials, well-suited for applications in the visible and near-infrared spectral ranges. LBTEK manufactures a wide range of double-concave lenses from N-BK7 for general-purpose use. In addition, LBTEK also offers double-concave lenses made from N-SF11. With its lower Abbe number, N-SF11 is often used to produce lenses with shorter focal lengths. LBTEK provides uncoated double-concave lenses as well as AR-coated versions optimized for three wavelength ranges: 400–700 nm, 700–1100 nm, and 1100–1650 nm. All lenses are precisely manufactured under strict quality control, ensuring that LBTEK delivers high-quality products at competitive prices.

Attribute

Optical component materialN-BK7

Operating Wavelength350 nm-2000 nm

Focal length tolerance±1%

Design wavelength587.6 nm

Surface finish (scratches/pits)40/20

Curved Aperture3

Local surface irregularity0.5

Eccentricity≤3 arcmin

Double-Concave Lens, N-BK7, Uncoated: 350 nm-2.0 μm

Substrate Material: N-BK7
Operating Wavelength: 350 nm-2000 nm
Application: Imaging, Beam Expansion
Pre-installed Mechanical Housing

The LBTEK double-concave lens has a negative focal length and is commonly used in applications such as imaging or beam collimation. LBTEK double-concave lenses are manufactured using N-BK7 glass that complies with RoHS standards. N-BK7 is the most commonly used material for high-quality optical components, primarily applied in the visible and near-infrared spectral ranges. All LBTEK circular lenses come pre-installed with standard lens sleeves or lens mounting adapters. These mechanical components are engraved with product model numbers, types, diameters, and focal lengths for easy identification of lens parameters by users.

LBTEK lens not installed is suitable for building compact systems

	Product Model	Diameter	Focal length	Unit Price	Compare	Lead Time
	MBCC10610	25.4 mm	-50.0 mm	$36.35		6 weeks

Double-Concave Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted

Substrate Material: N-BK7
Application: Imaging, Beam Expansion
Operating Wavelength: 350 nm-2000 nm

The LBTEK double-concave lens has a negative focal length and is commonly used in applications such as imaging or beam collimation. LBTEK double-concave lenses are manufactured using N-BK7 glass that complies with RoHS standards. N-BK7 is the most commonly used material for high-quality optical components, primarily applied in visible and near-infrared fields. All circular lenses from LBTEK can be mounted in LBTEK standard lens sleeves, fixed lens holders, and various coaxial mounting plates. Customers can choose the optimal mounting method for different application scenarios.

LBTEK lens not installed is suitable for building compact systems

	Product Model	Diameter	Focal length	Unit Price	Compare	Lead Time
	BCC10610	25.4 mm	-50.0 mm	$25.36		6 weeks