TELESCOPE MIRROR Russian patent published in 1995 - IPC

FIELD: optical instrument engineering. SUBSTANCE: mirror has central and six peripheral reflecting surfaces 1 and 2 correspondingly, cells 3 of the surfaces, common frame 9, contrivances for fixing peripheral reflecting surfaces 2 and position detectors 10. The detectors are connected electrically with drives 6 of surfaces 2. The drives are mounted for inclination and disposed behind the rare surface onto common frame 9. Contrivances for fixing surfaces 2 have gripping units with chucks. Each chuck has case, inside which medium under control is disposed. Diametrically opposite half-axes of the chuck rest against two shoes. External surface of shanks 4 of cells 3 is made in form of toroid. Spring-loaded rod is disposed at side channel of the case, which rod is conjugated with air duct. Shoes are compressed against internal surfaces of shanks 4 of cells 3 under effect of control medium. Control medium is under action of spring-loaded rod, and the rod is effected by air from air duct. At operating condition, air is released from the air duct, the rod is slackened, and control medium flows into side channel of case 1 of the chuck to release cell 3 of peripheral reflecting surfaces 2 from the shoes. Position detectors 10 of reflecting surfaces 2 generate data to drive 6 and set reflecting surfaces 2 into initial position. Such a design allows to reduce deformations of reflecting surfaces of the mirrors and to improve reliability of operation of working position of reflecting surfaces of the mirrors when telescope operates at dynamical range. EFFECT: improved reliability of operation. 2 cl, 4 dwg