Flat Axicon Lens PBA25-633-05

The 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, providing a uniform λ/2 retardation across the entire device plane.

The flat axicon lens exhibits polarization-dependent optical characteristics. Depending on the polarization state of the incident beam, it can achieve annular beam focusing or divergence. When the incident light is left-handed circularly polarized, it can generate Bessel beams with non-diffracting and self-healing properties.

Compared to traditional axicon lenses, the flat axicon lens features a planar structure without a three-dimensional conical tip, making it easier to integrate. The structural formation relies on orientation changes of liquid crystal molecules, enabling micron-level fabrication precision with large dispersion characteristics.

Key Features

• Liquid Crystal Polymer/N-BK7 Window Plate, sandwich flat plate structure
• Fast axis orientation with equal-period gradient distribution, λ/2 retardation
• Polarization-dependent: achieves annular beam convergence/divergence and Bessel beams
• Flat plate structure enabling high precision and large dispersion
• Working wavelengths: 532, 633, 1064 nm; deflection angles: 0.5°–4.7°
• Flexible customization available

Flat Axicon Lens, Clear Aperture Ø20 mm

Designed for three operating wavelengths: 532 nm, 633 nm, and 1064 nm. Offers five deflection angles: 0.5°, 1°, 2.0°, 2.3°, and 4.7°, providing flexible adaptation to various working distances. An arrow indicator on the side represents the beam propagation direction.