The LBTEK flat microlens array is a planar optical element based on the diffraction optics principle of liquid crystal polymers, designed for laser beam homogenization and shaping. It consists of a polymer film and a single N-BK7 window plate, utilizing the arrayed phase distribution on the liquid crystal polymer film to achieve microlens array functionality. The output beam profile is related to various parameters of the microlens units. By adjusting the phase period and contour of the microlens units, the divergence angle and spot shape of the output beam can be flexibly controlled, meeting diverse requirements for laser beam homogenization and shaping with various shapes and sizes. This device is polarization-dependent. By controlling the incident light to be right-handed or left-handed circularly polarized, the beam can be diverged or converged after passing through the unit lens. Based on the diffraction principle, the divergence or convergence angle of the unit lens follows sinθ = λ/p, where λ is the design wavelength and p is the radial phase period of the single lens. Additionally, the microlens array is designed for a single wavelength, free from spherical aberration, and features an anti-reflection coating on the incident surface, ensuring high transmittance and diffraction efficiency. It finds broad applications in various systems such as wavefront sensing, optical energy concentration, and beam shaping, with significant potential in fields like optical information processing, optical interconnects, optical computing, image scanners, light-field cameras, medical devices, 3D imaging and display. LBTEK offers standard microlens arrays with a size of Ø25.4 mm, microlens unit focal lengths of 5 mm and 50 mm, square output beam shapes, and operating wavelengths of 532 nm, 633 nm, 850 nm, 915 nm, and 976 nm. Furthermore, LBTEK also provides customized services for special specifications, including unique sizes, operating wavelengths, beam divergence angles, and beam profiles. For specific customization needs, please contact LBTEK Technical Support.