Product Description

l Optical Material: N-SF11

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

l Low Abbe Number, High Dispersion

l Application: Imaging, Beam Expansion or Reduction

     A plano-concave lens has one concave surface and one flat surface, with a negative focal length. It is commonly used for beam collimation, increasing (or decreasing) the focal length, or expanding (or reducing) the image. To minimize spherical aberration, when the incident beam is collimated, it should be directed onto the concave surface of the plano-concave lens. Because N-SF11 has a low Abbe number, Tuniu chooses to use N-SF11 to manufacture lenses with smaller focal lengths. Additionally, N-SF11 lenses are more suitable for particularly harsh (acidic and alkaline) environments. Apart from N-SF11 plano-concave lenses, Tuniu also offers plano-concave lenses made of N-BK7, UV fused silica, and calcium fluoride. N-BK7 is the most commonly used material for high-quality optical components, widely applied in visible and near-infrared applications. UV fused silica exhibits excellent transmittance in the ultraviolet range and a low thermal expansion coefficient, while calcium fluoride has an extremely high damage threshold and chemical inertness. Tuniu provides uncoated plano-concave lenses as well as lenses with three types of anti-reflection coatings: 400-700 nm, 700-1100 nm, and 1100-1650 nm. All our lenses undergo fine processing and strict quality control to ensure that Tuniu delivers high-quality lens products to customers at reasonable prices.

Attributes

Plano-Concave Lens, N-SF11, AR Coating: 400 nm-700 nm

l Pre-installed Mechanical Housing or Unmounted

     Tuniu Plano-Concave Lenses have negative focal lengths and are commonly used in applications such as imaging or beam collimation. Since N-SF11 has a lower Abbe number, Tuniu chooses to use RoHS-certified N-SF11 to manufacture lenses with various smaller focal lengths. Additionally, N-SF11 lenses are more suitable for particularly harsh (acidic or alkaline) environments. All circular lenses from Tuniu come pre-installed with standard lens sleeves or lens mounting adapters. The surfaces of these mechanical components are engraved with product model, type, diameter, and focal length, allowing users to quickly identify lens parameters.