Light emitting unit, light emitting device and distance measuring device

Abstract

The invention provides a light emitting unit, a light emitting device and a distance measuring device. The light emitting unit comprises a light emitting assembly, a reflecting mirror, and polarizingbeam splitters. The light emitting assembly consists of a first light emitting terminal for emitting first polarized light and a second light emitting terminal for emitting second polarized light, wherein the two light emitting terminals have the optical axes arranged in parallel; and the first polarized light and the second polarized light have the parallel emitting directions and vibration directions perpendicular to each other. The reflecting mirror is arranged at the propagation path of the first polarized light and is aligned with the first light emitting terminal. The polarizing beam splitters are arranged at the propagation paths of the first polarized light and the second polarized light and are opposite to the second light emitting terminal. The first polarized light and the second polarized light enter the polarizing beam splitters at brewster angles; and the second polarized light reflected by the polarizing beam splitters is combined with the first polarized light completely transmitted through thepolarizing beam splitter to form one beam of integrated light. Therefore, the light emitting power of the light source of the light emitting device can be improved; and thus the detection distance of the distance measuring device is increased.

Description

technical field [0001] The invention belongs to the field of optical distance measuring equipment, and in particular relates to a light emitting unit, a light emitting device and distance measuring equipment. Background technique [0002] At present, the ranging technologies of common optical ranging devices on the market usually include structured light, TOF (Time Of Flight, time-of-flight ranging method), laser radar, etc. After the signal reflected from the object to be measured is properly processed, the relevant information of the object to be measured can be obtained, so as to realize the detection, tracking and identification of the object to be measured. [0003] However, during the detection process of the ranging equipment, the luminous power of the light source will directly affect the detection distance of the ranging equipment, that is, the detection distance of the existing ranging equipment is limited by the luminous power of the light source. The scheme of e...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and to provide a light emitting unit, which aims to solve the problem that the light source of the existing light emitting device has a low luminous power, and thus the detection distance of the distance measuring device is limited

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