Variable focus lens and spectacles

Details Variable focus lens and spectacles Variable focus lens and spectacles

G - Physics

02

B

G02B 3/14 (2006.01) G02C 7/08 (2006.01)

Patent

CA 2725439

The invention provides a variable focus lens. The lens is formed from a ring (120) with a front surface (122) and a rear surface. A flexible membrane (140) is attached to a radially inner part (124) of the front surface, and a front cover (150) is attached to a radially outer part (126) of the front surface. A rear cover is provided on the rear surface of the ring, preferably integral with the ring, so that a variable volume cavity is defined between the flexible membrane, the ring and the rear cover. A second flexible membrane can be provided between the ring and the rear cover. The invention also provides a method of filling a variable focus lens, and an adjustment mechanism for varying the focus of the lens.

L'invention concerne une lentille à focalisation variable. La lentille est formée d'une bague (120) ayant une surface avant (122) et une surface arrière. Une membrane flexible (140) est fixée à une partie radialement interne (124) de la surface avant, et un couvercle avant (150) est fixé à une partie radialement externe (126) de la surface avant. Un couvercle arrière est disposé sur la surface arrière de la bague, de préférence incorporée à la bague, de telle sorte qu'une cavité à volume variable soit définie entre la membrane flexible, la bague et le couvercle arrière. Une seconde membrane flexible peut être disposée entre la bague et le couvercle arrière. L'invention concerne également un procédé de remplissage d'une lentille à focalisation variable et un mécanisme de réglage permettant de faire varier la focalisation de la lentille.

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