Zhekov, Zhivko, and Krasimir Kalev. 2023. “A SPECIAL CASE OF CALCULATION OF OPTICAL SYSTEM FOR A COLLIMATOR WITH AN ANFOCAL ACHROMATIC COLLIMATOR: A SPECIAL CASE OF CALCULATION OF OPTICAL SYSTEM FOR A COLLIMATOR WITH AN ANFOCAL ACHROMATIC COLLIMATOR”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 18 (1):12-16. https://doi.org/10.46687/jsar.v18i1.274.