Product Description

l Optical Material: N-BK7

l Operating Wavelength: 400 nm-700 nm (AR Coating)

l Application: Imaging, Beam Expansion

     Tuniu Double-Concave Lenses feature two concave surfaces with equal radii of curvature and provide a negative focal length. These lenses are commonly used for beam collimation, focal length adjustment, or image reduction/magnification. Tuniu offers double-concave lenses made from N-BK7, one of the most widely used optical glasses for high-quality components, suitable for applications in the visible and near-infrared regions. In addition to N-BK7, Tuniu also provides N-SF11 double-concave lenses, which, due to their lower Abbe number, are typically used in designs requiring shorter focal lengths. To meet different system requirements, Tuniu supplies both uncoated double-concave lenses and AR-coated versions optimized for 400–700 nm, 700–1100 nm, and 1100–1650 nm. All lenses are precisely manufactured and subject to strict quality control, ensuring that Tuniu delivers reliable, high-performance optical components at competitive prices.

Attributes

Double-concave Lens, N-BK7, AR Coating: 400 nm-700 nm·

l Pre-installed Mechanical Housing

     The Tuniu double-concave lens has a negative focal length and is commonly used in applications such as imaging or beam collimation. Tuniu 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 Tuniu 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.

Double-Concave Lens, N-BK7, AR Coating: 400 nm-700 nm, Unmounted

     The Tuniu doube-concave lens has a negative focal length and is commonly used in applications such as imaging or beam collimation. Tuniu 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 Tuniu can be mounted in Tuniu standard lens sleeves, fixed lens holders, and various coaxial mounting plates. Customers can choose the optimal mounting method for different application scenarios.