Abstract: A high-speed laser distance measuring device is described that includes an emitting part and a receiving part. The emitting part can include a polarizer (2) arranged between a light emitting tube (1) and a reflective mirror (3); the receiving part can further include a polarizing beamsplitter (7) arranged between the optical filter (6) and the receiving tube set. The light emitting tube (1) can emit an outgoing light beam to the polarizer (2), and the outgoing light beam can form an outgoing polarized light beam and is transmitted into the reflective mirror (3). After being reflected by the reflective mirror (3) and passing through the transmitting objective lens (4), the outgoing polarized light beam can be transmitted onto a target object. After being reflected by the target object, the outgoing polarized light beam can form a reflected polarized light beam, which passes through the receiving objective lens set (5) and is transmitted to the optical filter (6).

Abstract: A laser distance measuring device and a method of use thereof are described. The laser distance measuring device can include an emitting unit (4), a reflecting mirror (3), an emitting lens (2), a receiving lens (1), and a receiving unit (8); the laser distance measuring device can further include: at least one spectroscope (7) provided between the receiving lens (1) and the receiving unit (8), which is arranged successively on the same optical propagation path; at least one spectrum receiving unit (9) arranged in a one-to-one correspondence with the spectroscope (7). The technical solution has a wider measurement range and is adaptable to measured targets in different distances; a multiplicity of feedbacks and adjustments is not necessary, and the acquirement of the measurement data can be achieved in a short time, therefore the operating time is saved.