A mirror-lens objective has been developed that focuses a powerful laser beam with a planar wavefront into a straight line 10 mm long. The objective is intended for the creation of extended plasma objects. The construction involves an improved version of Maksutov's meniscus system, based on a toroidal mirror. A sample with an effective diameter of 130 mm and a relative aperture of 1:2.4 has been fabricated and investigated.
V. G. Borodin, V. M. Migel', A. V. Charukhchev, A. V. Glazyrin, Yu. V. Stolyarov, and A. A. Starkov, "A mirror-lens focusing objective with a toroidal mirror," J. Opt. Technol. 70, 721-723 (2003)