| US 7,567,369 B2 | ||
| Optical apparatus | ||
| Ichiro Onuki, Kawasaki (Japan); Goro Noto, Tokyo (Japan); and Eriko Kawanami, Kawasaki (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Jun. 16, 2008, as Appl. No. 12/213,173. | ||
| Application 12/213173 is a division of application No. 11/601769, filed on Nov. 20, 2006, granted, now 7,388,705. | ||
| Application 11/601769 is a division of application No. 11/184937, filed on Jul. 20, 2005, granted, now 7,142,344, filed on Nov. 28, 2006. | ||
| Application 11/184937 is a division of application No. 10/914269, filed on Aug. 10, 2004, granted, now 6,950,219, filed on Sep. 27, 2005. | ||
| Application 10/914269 is a division of application No. 09/795397, filed on Mar. 01, 2001, granted, now 6,806,988, filed on Oct. 19, 2004. | ||
| Claims priority of application No. 2000-058295 (JP), filed on Mar. 03, 2000; application No. 2000-058312 (JP), filed on Mar. 03, 2000; application No. 2000-058377 (JP), filed on Mar. 03, 2000; and application No. 2000-187227 (JP), filed on Jun. 22, 2000. | ||
| Prior Publication US 2008/0252990 A1, Oct. 16, 2008 | ||
| Int. Cl. G02F 1/03 (2006.01); G02B 1/06 (2006.01) | ||
| U.S. Cl. 359—253 [359/245; 359/250; 359/254; 359/665; 359/666] | 2 Claims |
| 1. An optical apparatus comprising:
an optical element having a container sealing a first liquid that is conductive or polarized and a second liquid that does
not mutually mix with the first liquid, with an interface of the first liquid and second liquid in a predetermined form, wherein
optical characteristics of the optical element change according to change of interface form due to application of voltage
between first and second electrodes provided in the container;
a power supply circuit which applies a predetermined voltage to the electrodes in order to change the interface form;
a detecting circuit which detects change of the interface form; and
a controlling circuit which controls the applied voltage signal based on information detected by the detecting circuit.
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