Controllable mirror

Details Controllable mirror Controllable mirror

H - Electricity

01

S

345/10, 352/32.2

H01S 3/083 (2006.01) G01C 19/64 (2006.01) G02B 7/182 (2006.01) H01S 3/086 (2006.01)

Patent

CA 1162281

ABSTRACT OF THE DISCLOSURE The present invention relates to a mirror constrained to translation, the position thereof being controlled by a piezoelectric ceramic operating as a bimorph. The controllable mirror is particularly useful in a ring laser. The mirror is attached at one end of a central post which is coaxial with a surrounding rigid rim. A pair of flexible parallel membranes are connected at the outer boundaries thereof to the rim member and to the central post. A rigid hub is positioned adjacent and coaxial with the other end of the central post member and includes a bearing member which will apply an axial force to the central post. A metallic membrane is attached to the hub member and to another rim member which in turn is connected to the first rigid rim member. A pair of piezoelectric wafers are attached to opposite surfaces of the metallic membrane and are connected to a source of control voltage. Changes in the control voltage are reflected in stress changes in the wafers which in turn effect a movement of the metallic membrane. The bearing member acts or. the central post to move the mirror in or out, without any tilting thereof.

358437

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