Light source device, light source generation method and laser projector having same

Abstract

The application discloses a light source device, a light source generation method and a laser projector having same. The light source device comprises a laser device for sending a laser pulse signal and an optical fiber for guiding said laser pulse signal into a laser beam that is transmitted along the first direction. The light source device further comprises a first collimation part for handling the first collimation process for the laser beam transmitted along the first direction and then obtaining a laser beam with the emission full-angle smaller than or equal to the first angle thresholdso as to emit the beam along the first direction; a scattering part disposed between the first collimation part and the second collimation part, which is used for speckling the laser beam processed by the first collimation and then emitting the beam along the first direction; and a second collimation part disposed along the first direction with the optical axis, which is used for handling the second collimation process for the received laser beam transmitted along the first direction and then obtaining a laser beam with the emission full-angle smaller than or equal to the second angle threshold. The invention can effectively obtain the input light source for the laser projector with efficient light use ratio.

Description

Technical field [0001] The present invention relates to light projection technology, in particular to a light source device, a light source generation method and a laser projector including the light source device. Background technique [0002] In recent years, laser projectors have been widely used in many occasions due to their simple principle, low manufacturing difficulty, rich colors, and low visual impact. However, the input light source required by the laser projector is a surface light source, and there are higher requirements for the input surface light source. For example, for some laser projectors, the input surface light source can only be a surface light source with a diameter of tens of millimeters. Therefore, how to obtain a good input light source has become an important issue for the development of laser projection technology. [0003] At present, a laser generator is used as the original light source of a laser projector, and a point light source is output throu...

AI Technical Summary

Problems solved by technology

But, the technical scheme in CN101872071 is only for the situation of the laser beam of small emission full-angle, can not be applicable to the situation of the laser beam of large emission full-angle

For example, the existing technical solutions cannot ensure that the diameter of the obtained surface light source is on the order of tens of millimeters, that is, the surface light source output by the aforementioned collimating optical lens group cannot meet the requirements of the laser projector for the input light source

[0008] In addition, CN101872071 simply gives the parameters and positional relationship of each optical element, but does not disclose any means to ensure such parameters and positional relationship

When the aforementioned parameters and positional relationship are on the order of millimeters, especially when the accuracy of some parameters needs to reach the hundredth or even the thousandth, without effective adjustment and support devices, such accuracy cannot be guaranteed at all.

In the case of deviations in parameters and positional relationships, the energy of the laser may be greatly consumed, resulting in low light utilization

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