Distance measuring device

A distance measuring device for measuring a distance to an object, comprising:

• a light-emitting module, having a housing, a light source disposed in the housing, a light grating element, and an optical path adjuster, wherein the light source emits a measuring light sequentially through the optical path adjuster and the light grating element along a first axis, and the light grating element, the optical path adjuster, and the light source are sequentially arranged along the first axis, wherein the house at least partially overlaps the light grating element when viewed along the first axis;
• a driving assembly, disposed in the light-emitting module to drive the optical path adjuster or the light grating element to move relative to the housing;
• and
• a light-receiving module, receiving the measuring light which is reflected by the object to obtain distance information of the object.