LBTEK Flat Axicon Lens (PB Axicon, PBA) is fabricated on an N-BK7 glass substrate using Liquid Crystal Polymer (LCP) material, featuring a sandwich structure of "glass substrates on both sides with an LCP functional film layer in between." In the LCP layer, the fast-axis orientation of the liquid crystal molecules exhibits an equal-period gradient distribution along the radial direction of the substrate, providing a uniform λ/2 retardation across the entire device plane, making it a single-wavelength component. The flat axicon lens exhibits polarization-dependent optical characteristics. Depending on the polarization state of the incident beam, it can be used to achieve annular beam focusing or divergence. When the incident light is left-handed circularly polarized, it can also generate Bessel beams with non-diffracting and self-healing properties. Compared to traditional axicon lenses, LBTEK's flat axicon lens features a planar structure without a three-dimensional conical tip, making it easier to integrate. Additionally, the structural formation of its conical tip relies on the orientation changes of liquid crystal molecules, enabling micron-level fabrication precision. It also exhibits large dispersion characteristics. LBTEK offers standard 1-inch flat axicon lenses with working wavelengths (λ) of 532 nm, 633 nm, and 1064 nm, as well as deflection angles (half-angle) of 0.5°, 1°, 2.0°, 2.3°, and 4.7°. Custom parameter specifications are also supported to meet diverse application requirements. For details, please consult LBTEK Technical Support.