METHODS AND SYSTEMS FOR LASER DISTANCE MEASURING, FOUSING METHODS AND SYSTEMS, AND DEVICES FOR AUTO-FOCUSING ANALYSIS

A method for laser distance measuring includes: emitting an incident ray α having an incident angle δ to a reflective surface of a laser reflecting mirror (), the incident ray α being reflected by the laser reflecting mirror () to generate a first reflected ray β, and the first reflected ray β irradiating an object to be measured (); capturing a second reflected ray θ and generating a laser image on a laser imaging plane (), the second reflected ray θ being generated by the reflective surface of the laser reflecting mirror () reflecting a return ray γ generated after the first reflected ray β irradiates a surface of the object to be measured; and determining, based on the laser image, a measurement distance A according to a geometrical trigonometry.