Optical lens or lens system with variable servo control focusing

摘要

Optical lens with a variable focus servo, which is formed of a pair of optical diaphragms (1, 6), each having a circumferential edge and at least one of which is flexible. The barrel (8 ") holds while the membranes (1, 6) at their edges alongside one other lying a fixed value so that between the surfaces of the membranes (1, 6) and their combined peripheral edges of a trapped volume chamber (9), which (with a refractive fluid is filled 20) defined. A with the socket (8 ") co-operating control means (31) allows the selective application of forces to the peripheral edges (1, 6), the fluid pressure in the enclosed volume (9A) change of the membranes. The membranes (1, 6) and the socket (8 ") are designed and arranged that the membrane surfaces can be changed in a substantially spherical manner in response to pressure changes in the fluid (20).