LIDAR device including a dynamic filter, and method

A method for scanning a scanning angle with a LIDAR device, the method comprising:

• generating, via at least one radiation source, at least one electromagnetic beam, which is a generated beam having a wavelength in a non-visible infrared range;
• deflecting, via a rotatable mirror, the at least one electromagnetic beam along the scanning angle;
• receiving and filtering, via a receiving unit and at least one filter, at least one incoming beam reflected on an object;
• and
• detecting the at least one reflected incoming beam;
• wherein at least one filter is adapted according to a wavelength and/or an incidence angle of the at least one incoming beam, and
• wherein the LIDAR device includes:
• the at least one radiation source to generate the at least one electromagnetic beam;
• the rotatable mirror to deflect the at least one electromagnetic beam along the scanning angle;
• the receiving unit to receive the at least one incoming electromagnetic beam and to deflect the at least one incoming electromagnetic beam to at least one detector;
• and
• the at least one filter adaptable to the at least one incoming electromagnetic beam;
• wherein the rotatable mirror is configured to deflect the generated beam along a defined horizontal scanning angle, wherein the rotatable mirror is swivel-able along a rotational axis and orthogonally with respect to the horizontal scanning angle (H) so as to cover a vertical scanning angle (V), so as to scan a solid angle (V×H) for locating an object positioned in the solid angle (V×H), and
• wherein the rotational axis extends orthogonally through an x-y plane of the receiving unit, wherein an incidence angle of the incoming beam includes a component of the horizontal scanning angle (H) and a component of the vertical scanning angle (V), wherein the at least one, filter is rotatably mounted and is rotated synchronously with the rotatable mirror or is periodically swiveled along another rotational axis, which extends in parallel to the rotational axis, for scanning in the horizontal scanning angle (H), wherein the filter is adjusted so that the incoming beam can impact perpendicularly the filter, wherein the filter does not have an adaptation of its angle when the object is situated frontally or slightly offset with respect to an optical axis, and wherein when the object is located farther from the optical axis, the incoming beam has a greater incidence angle, wherein since the filter is swiveled synchronously with the mirror, the incidence angle is greater in relation to the optical axis, but the incidence angle in relation to the adjusted filter is 0°, so that the incoming beam can transmit through the filter and enter the receiving unit.