Scanning reflector system

An apparatus including a reflector system and a feedback circuit, wherein

• the reflector system comprises a support, a reflector and a spring structure suspending the reflector from the support for scanning motion of the reflector in two orthogonal oscillation modes;
• each oscillation mode has a frequency response that peaks at a natural resonant frequency with an initial bandwidth;
• the reflector system includes a first transducer structure for mechanical actuation of the reflector, and a second transducer structure for generating one or more sense signals representing mechanical motion of the reflector;
• the feedback circuit is configured to receive from a transducer of the second transducer structure a sense signal and generate to a transducer of the first transducer structure a drive signal based on the received sense signal, wherein for each of the two oscillation modes, the feedback circuit is configured to
• adjust amplitude and frequency of the drive signal to a non-linear vibration range where a frequency shift at the peak frequency is at least ten times the initial bandwidth;
• vary the amplitude of the drive signal in proportion to a waveform of a modulation signal.