Optoelectronics provider Excelitas Technologies Corp. is acquiring privately held photonics products maker Qioptiq from Arle Capital Partners, the companies announced Monday. The purchase price was not disclosed. Waltham-based Excelitas provides optoelectronic devices for markets ranging from medical lighting to analytical instrumentation, clinical diagnostics, industrial, safety and security, and aerospace and defense. It employs approximately 3000. Originally acquired by Candover Partners in 2005 but managed by London-based private equity manager Arle since 2010, Qioptiq employs 2000 and has operations in the US, Germany, the UK, Hungary and Singapore. It primarily serves the medical, life sciences, semiconductor and machine vision markets. "We have helped the company develop into the global player it is today," said Arle partner Nils Stoesser. "Growing organically as well as through strategic acquisitions in Germany and the UK, Qioptiq is now a leading player in the photonics sector." "Excelitas and Qioptiq are both market leaders in their respective product spaces, and our combined portfolio of active and passive optoelectronics products and capabilities will offer the global OEM community a one-stop source for high-reliability, high-performance photonic components and subsystems solutions," said Excelitas CEO David Nislick. The transaction is subject to customary closing conditions and is expected to be completed in the next 60 days, the companies said. For more information, visit: www.excelitas.com or www.qioptiq.com