Abstract: A method of determining a reference calibration setting for an adaptive optics system (1) comprising a detecting device (8) for detecting light from an object (5); and at least one controllable wavefront modifying device (9) arranged such that light from the object (5) passes via the wavefront modifying device (9) to the detecting device (8).

Abstract: An optical system (120) for detecting optical aberrations of light from an object (101), the optical system comprising: a reference light-source (102) providing collimated reference light; an optical element (212) configured to focus at least one collimated light beam incident on the optical element (212) to a plurality of focal points in a conjugate object plane (214), the optical element (212) being arranged in an optical path between the reference light-source (102) and the object (101) for transmitting a plurality of reference light beams towards the object (101); and a wavefront sensor (112) configured to detect a property indicative of an optical aberration of light incident on the wavefront sensor; wherein the optical element (212) is further arranged to transmit a plurality of reflected guide star light beams resulting from reflection of the reference light beams at the object (101) towards the wavefront sensor (112).

Abstract: A method of determining a reference calibration setting for an adaptive optics system (1) comprising a detecting device (8) for detecting light from an object (5); and at least one controllable wavefront modifying device (9) arranged such that light from the object (5) passes via the wavefront modifying device (9) to the detecting device (8).

Abstract: A method of determining a reference calibration setting for an adaptive optics system comprising a detecting device for detecting light from an object; and at least one controllable wavefront modifying device arranged such that light from the object passes via the wavefront modifying device to the detecting device. The method comprises: arranging a light-source between the object and the wavefront modifying device to provide a reference light beam to the detecting device; for each of a plurality of orthogonal wavefront modes: controlling the wavefront modifying device to vary a magnitude of the orthogonal wavefront mode; acquiring a series of readings of the detecting device, each reading corresponding to one of the magnitude; determining a quality metric value for each reading, resulting in a series of quality metric values; and determining a reference parameter set for the wavefront modifying device corresponding to an optimum quality metric value.

Abstract: An optical system (120) for detecting optical aberrations of light from an object (101), the optical system comprising: a reference light-source (102) providing collimated reference light; an optical element (212) configured to focus at least one collimated light beam incident on the optical element (212) to a plurality of focal points in a conjugate object plane (214), the optical element (212) being arranged in an optical path between the reference light-source (102) and the object (101) for transmitting a plurality of reference light beams towards the object (101); and a wavefront sensor (112) configured to detect a property indicative of an optical aberration of light incident on the wavefront sensor; wherein the optical element (212) is further arranged to transmit a plurality of reflected guide star light beams resulting from reflection of the reference light beams at the object (101) towards the wavefront sensor (112).

Abstract: A method of determining a reference calibration setting for an adaptive optics system (1) comprising a detecting device (8) for detecting light from an object (5); and at least one controllable wavefront modifying device (9) arranged such that light from the object (5) passes via the wavefront modifying device (9) to the detecting device (8).

Abstract: The present invention relates to an adaptive optics sensor intended for simultaneous detection of several wavefronts on a common camera target. The sensor is intended for use in connection with multi-conjugate adaptive optics (MCAO), where several wavefront measurements are needed at the same time. The sensor includes a spatial filter taking out signals resulting from parasitic reflections of the reference sources and from unwanted parts of the object.

Abstract: The present invention relates to an adaptive optics sensor intended for simultaneous detection of several wave fronts on a common camera target. The sensor is intended for use in connection with multi-conjugate adaptive optics (MCAO), where several wave front measurements are needed at the same time. The sensor includes a spatial filter taking out signals resulting from parasitic reflections of the reference sources and from unwanted parts of the object.