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

Claim 0:
1. 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 tiltable mirror comprises a plurality of magnets rigidly arranged on the back side of the mirror substrate, wherein the magnets are configured for actuating the mirror substrate by means of a Lorentz force, wherein the plurality of magnets comprises a first and a second primary magnet as well as a first and a second secondary magnet, wherein the first primary magnet is arranged laterally shifted with respect to the primary axis on the mirror substrate, wherein the second primary magnet is arranged laterally shifted to the primary axis and opposite of the first primary magnet, wherein the first secondary magnet is arranged laterally shifted with respect to the secondary axis on the mirror substrate (1S), wherein the second secondary magnet is arranged laterally shifted to the secondary axis and opposite of the first secondary magnet, each magnet having associated a corresponding actuation coil arranged on the mirror frame.