Lidar system and method of operating the same

A light detection and ranging (LiDAR) system comprising:

• a light emitter configured to emit first lights of different wavelengths in a vertical scan;
• a lens configured to converge second lights that are reflected from objects on which the first lights are emitted;
• a light filter comprising an active-type device configured to adjust a transmission central wavelength of the active-type device to the different wavelengths of the first lights are emitted from the light emitter;
• a controller configured to:
• set a wavelength of light to be emitted;
• apply a light emission starting signal to the light emitter so that the light emitter emits the light of the set wavelength;
• adjust the light transmission central wavelength of the light filter to the set wavelength;
• in the vertical scan, detect whether a current scanning angle of the emitted light with respect to a horizontal axis of the light emitter is within a preset range;
• based on the current scanning angle being detected to be within the preset range, maintain a present scanning state of the light emitter;
• and
• based on the current scanning angle being detected to be outside the preset range, reset, to a new wavelength, the wavelength of the light to be emitted;
• and
• a detector configured to detect the first lights emitted from the light emitter, and obtain information about the objects.