Patent ID: 7410309
Filing Date: 2008-08-12
Classification: G02B,G02F,H01F,H04N

Abstract:
1. An optical shutter, said shutter comprising: a capillary space between two substantially transparent surfaces, a fluid reservoir in connection with said capillary space, an amount of opaque fluid, an amount of substantially transparent fluid in direct contact with said amount of opaque fluid, and a displacement device to move said amount of opaque fluid from said fluid reservoir to said capillary space to block an optical path passing through said capillary space, wherein said displacement device comprises a first diaphragm coupled to a first piezoelectric actuator and a second diaphragm coupled to a second piezoelectric actuator, and wherein said amount of opague fluid is moved from said fluid reservoir by contracting the first piezoelectric actuator and expanding the second piezoelectric actuator.