Patent ID: 11874457
Assignee: MARADIN LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A method for projecting an image comprising:
providing a scanning mirror having a resonance frequency which is unequal to a target operating frequency (aka “scanning frequency”) at which the mirror is to operate;
providing logic and an actuator e.g. motor; and
using the scanning mirror to project at least one image, including repeatedly using the logic to measure the mirror's operating frequency and to control the actuator to apply at least one force, to the mirror, which causes the mirror's instantaneous operating frequency to equal the target operating frequency;
the method also comprising providing a sensor of the mirror's position or scanning angle which measures a signal proportional to the periodic scanning motion and, responsively, provides a reading to the logic which receives said reading, multiplies the reading by a constant thereby to obtain a scalar number, and commands the motor to apply a second force, whose magnitude equals the scalar number, to the mirror, wherein the logic multiplies the reading by a spring constant.