Micro lens array processing technologyIt is a key technology for manufacturing array elements composed of hundreds to tens of thousands of micro lenses. With high integration, uniform optical performance, and strong mass production capabilities, it plays an important role in optical communication, imaging display, biomedicine, and other fields, promoting the upgrading of optical systems towards miniaturization, lightweight, and multifunctionality. ​

High integration and performance uniformity are its core competitiveness. This process can prepare micro lens arrays with consistent size and curvature radius deviation of less than 1% on a substrate of a few square millimeters. The diameter of each micro lens is usually between 5 μ m and 500 μ m, and the focal length ranges from tens of micrometers to several millimeters. In the field of optical communication, micro lens arrays can achieve parallel coupling of multi-channel optical signals, greatly improving the transmission capacity of fiber optic communication; In the mobile phone camera module, the image sensor integrated with a micro lens array can enhance the amount of incoming light and improve the imaging quality in low light environments. ​

Diversified process routes adapt to different needs. The processing technology of micro lens array mainly includes photolithography hot melt method, grayscale photolithography method, nanoimprint method, femtosecond laser direct writing method, etc. The photolithography hot melt method forms photoresist pillars through photolithography, and then heats them to drive surface tension to form spherical lenses. The process is simple, low-cost, and suitable for the consumer electronics field; Nano imprinting method replicates micro lens structures in batches through high-precision molds, with high production efficiency and the ability to achieve large-scale manufacturing of millions of components; The femtosecond laser direct writing method does not require a mask and directly etches complex shaped microlenses on the substrate, which is suitable for scientific research and customized needs. ​

Multi functional integration drives technological innovation. Modern micro lens array processing technology can be combined with coating, doping and other technologies to achieve additional functions such as anti reflection, polarization, and filtering. In the field of biomedicine, micro lens arrays with integrated fluorescence filtering function can be used for cell imaging to improve detection efficiency; In AR/VR devices, anti reflective micro lens arrays can reduce light reflection interference and improve the clarity of virtual images. In addition, this process can also prepare non spherical and free-form surface micro lens arrays, providing more possibilities for the design of new optical systems. ​