Micromirror resonance supression using configurable filter

An optical system comprising:

• a micromirror;
• an actuation component configured to actuate the micromirror;
• a notch filter configured to suppress frequencies in an actuation signal generated by the actuation component within a target suppression frequency range that depends on configuration of the notch filter;
• and
• a notch filter configuration component that is configured to configure actuation of a micromirror to suppress mechanical resonance of the micromirror, by being configured to perform the following:
• subjecting the micromirror to a first plurality of actuation frequencies, wherein the first plurality of actuation frequencies comprises at least a chirp;
• measuring a mechanical response of the micromirror to the first plurality of actuation frequencies;
• determining a second plurality of actuation frequencies, wherein the second plurality of actuation frequencies comprises a smaller frequency range determined based on the mechanical response of the micromirror to the chirp;
• measuring a mechanical response of the micromirror to the second plurality of actuation frequencies;
• determining a resonant frequency of the micromirror using the mechanical response of the micromirror to the second plurality of actuation frequencies determined based on the mechanical response of the micromirror to the chirp;
• selecting notch filter parameters of a notch filter configured to filter actuation signals of the micromirror, the selection depending on the determined resonant frequency of the micromirror;
• and
• configuring the notch filter with the selected notch filter parameters.