A microlens array optic was fabricated for laser surface microstructuring of polymer surfaces. The optic contains a hexagonal close-packed monolayer of microspheres, held together by an adhesive substance and supported on fused silica glass. The array is placed in direct contact with the target substrate and is exposed to UV light at a wavelength of . During this exposure, the spheres act as microlenses, which focus the incoming laser light, but also enhance the optical near-field intensity underneath each microsphere. A large number of identical structures are produced simultaneously using this type of direct laser ablation, which leads to a highly efficient process. The ablated holes are approximately in diameter, with a pitch of and a depth of . This microlens array has many advantages over other types of array, including the fact that it is inexpensive and easy to fabricate. An important feature is that it can transmit light at a wavelength less than , which makes it suitable for laser surface patterning.