Patent ID: 11867928
Assignee: ADLENS LTD
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A method of filling an envelope of a compression-type adjustable optical device, such as a liquid lens or mirror, which is formed in part by a distensible membrane having an exterior optical surface, with a substantially incompressible fluid to a predetermined optical power or radius of curvature; the method comprising pumping fluid into the envelope under vacuum through a fluid supply conduit in fluid communication with an interior of the envelope while allowing air to escape from the envelope through a fluid overflow conduit in fluid communication with the interior of the envelope; continuing to pump fluid into the envelope to cause the membrane to distend to an optical power of the optical device which is greater than the predetermined optical power while allowing excess fluid to escape from the envelope through the overflow conduit; slowing or stopping the supply of fluid to the envelope, thereby to allow the membrane progressively to relax and monitoring the optical power of the optical device until it falls to the predetermined optical power; removing the fluid supply conduit and fluid overflow conduit; and thereafter sealing the envelope.