model: APSF13-1AT Micro-lens and pinhole combination, an effective solution to the laser beam during transmission due to the optical device through the defects and the impact of small particles in the air, resulting in the scattering problem. Micro-lens Travel Range 13mm Travel Accuracy 0.005mm PinholeTravel Range ± 1.5mm Weight 0.4kg Readable Resolution 0.01mm more details or more related products, please contact us we can accept customize