Product Description

l Optical Material: UV Fused Silica

l Operating Wavelength: 200 nm-2.1 μm (Uncoated)

l Application: Imaging, Beam Expansion or Reduction

     The plano-concave lens has one concave surface and one flat surface, featuring a negative focal length. It is commonly used for beam collimation, increasing (or decreasing) focal length, or expanding (or reducing) images. To minimize spherical aberration, when the incident beam is collimated, it should be directed onto the concave surface of the plano-concave lens. Tuniu chooses Ultraviolet-Grade Fused Silica (UVFS) as the substrate material for lenses because UVFS exhibits high transmittance in the deep ultraviolet spectrum and produces almost no laser-induced fluorescence. Additionally, UV fused silica offers better homogeneity and a lower coefficient of thermal expansion compared to N-BK7. Besides UVFS plano-concave lenses, Tuniu also provides plano-concave lenses made of N-BK7, N-SF11, and calcium fluoride. N-BK7 is the most commonly used material for high-quality optical components, widely applied in visible and near-infrared applications. N-SF11 is characterized by its low Abbe number and high dispersion, while calcium fluoride boasts an extremely high damage threshold and chemical inertness. Tuniu offers Uncoated UVFS Plano-Concave Lenses as well as lenses with four types of anti-reflection coatings: 245-400nm, 400-700nm, 700-1100nm, and 1100-1650nm. All our lenses undergo precision machining and strict quality control to ensure that Tuniu delivers high-quality lens products to customers at reasonable prices.

Attributes

Plano-Concave Lens, UVFS, Uncoated: 200 nm-2.1 μm

l Pre-installed Mechanical Housing or Unmount

     Tuniu Plano-Concave Lenses have a negative focal length and are commonly used for image reduction or beam divergence. Since UVFS has a low Abbe number, Tuniu selects Ultraviolet-Grade Fused Silica as the lens substrate material because UVFS exhibits high transmittance in the deep ultraviolet spectrum and generates almost no laser-induced fluorescence. Additionally, UV fused silica offers better homogeneity and a lower coefficient of thermal expansion compared to N-BK7. All circular lenses from Tuniu come pre-installed with standard lens sleeves or lens mounting adapters. These mechanical components are engraved with product model, type, diameter, and focal length for easy identification of lens parameters by users.