Adlens Limited

Gatan, Inc.

Tom Worsley

Robert Edward Stevens

Jon Nisper

Derek Paul Forbes Bean

Peter Lee Crossley

Rita Stella

Thomas Jacoby

Richard Wilhelm Janse Van Rensburg

William Guest

Ashutosh Kumar

John Andrew Hunt

Thomas Norman Llyn Jacoby

Michael Bertilson

Methods 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 methods 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 () that is greater than the predetermined optical power while allowing excess fluid () to escape from the envelope through the overflow device (); 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 (). Also disclosed is an overflow device having a deflector portion () and a filling device () for use in the methods of the invention.

Methods and assemblies relating to the manufacture of variable focusing power optical devices

A method of assembling an adjustable fluid-filled lens assembly comprising biaxially tensioning an elastomeric membrane to a surface tension of greater than 180 N/m, typically greater than 1000 N/m; thermally conditioning the tensioned membrane, e.g., for one hour at a temperature of about 80&#xb0; C., to accelerate relaxation of the membrane; mounting the membrane to a peripheral support structure whilst maintaining the tension in the membrane; assembling the mounted membrane with one or more other components to form an enclosure with the membrane forming one wall of the enclosure; and thereafter filling the enclosure with a fluid. The membrane may be formed from an aromatic polyurethane, and the fluid may be a phenylated siloxane. In some embodiments, the membrane is able to hold a substantially constant surface tension of at least 180 N/m for a period of at least 12 months.

Adjustable fluid-filled lens assembly and method for assembling the same

An apparatus for collection, distribution, and analysis of cathodoluminescence (CL) and other light signals in an electron microscope is provided. The optical hub, utilizing a linear-translating fold-mirror and mounted to the electron microscope, is used to receive essentially collimated light collected from a collection-mirror and efficiently route the collected light to a plurality of light-analysis instruments. The linear-translating fold-mirror can provide fine positional alignment of the light signal, and in an aspect of the invention can be used to select or scan a portion of the collected light-pattern into an optical slit or aperture. In one aspect, the optical hub includes a light filter mechanism that can track the movement of the fold-mirror. In an aspect, the optical hub also controls the positioning of the collection-mirror in proximity to the specimen being analyzed.

Cathodoluminescence optical hub

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Chipping Norton, United Kingdom

Tom Worsley