Patent ID: 11956540
Assignee: OPTOTUNE SWITZERLAND AG
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. A tiltable mirror for optical image stabilization in an optical imaging system, the tiltable mirror comprising
a rigid mirror substrate with a planar reflective layer on a front side of the mirror substrate for reflecting incident light in an optical imaging system,
a mirror frame, wherein the mirror substrate is arranged tiltably in the mirror frame,
an actuator for tilting the mirror substrate around a primary and a secondary tilt axis with respect to the mirror frame,
wherein the actuator is configured to generate a Lorentz force for tilting the mirror substrate, wherein the actuator comprises at least one permanent magnet rigidly arranged on a back side of the mirror substrate opposite the reflective layer, and a plurality of actuation coils for tilting the mirror substrate around the primary and the secondary axis wherein the plurality of actuation coils comprises at least a first primary actuation coil arranged for tilting the mirror substrate at least around the primary axis, and at least a first secondary actuation coil arranged for tilting the mirror substrate at least around the secondary axis, wherein the first primary coil is arranged laterally shifted with respect to the primary axis on the mirror frame and wherein the first secondary actuation coil is arranged laterally shifted with respect to the secondary axis on the mirror frame wherein the mirror substrate is arranged on a two-axis gimbal connected to the mirror frame allowing for independently tilting the mirror substrate in the mirror frame around the primary and the secondary axis, wherein the two-axis gimbal comprises a spring means that comprises a central part comprising the mirror substrate, wherein the central part is integrally connected to a circumferential first part surrounding the central part such that the central part can be tilted about the primary axis with respect to the first part, and wherein the first part is integrally connected to a circumferential second part surrounding the first part so that the first part together with the central part can be tilted with respect to the second part about the secondary axis, wherein the mirror with the two-axis gimbal comprises a resonance frequency for moving the mirror substrate below 5 Hz or above 30 Hz.