Laser light sources, light emitting devices and lamps

Abstract

The invention provides a laser light source, a related light emitting device and a related lamp. The laser light source comprise a laser emitting source for emitting a laser, a first gathering deviceand a second gathering device, wherein each of the first gathering device and the second gathering device is a ball lens or a ball lens set. The laser light source further comprises a fluorescent device located on the optical axis of the second side of the second gathering device, the distance between the fluorescent device and the main face of the second gathering device is smaller than the minimum focal length of the second gathering device, wherein A is larger than or equal to 50 degrees. After sequentially passing through the first gathering device and the second gathering device from theposition near the optical axis, the laser is focused to the fluorescent device, and the fluorescent device generates a received laser. The full spherical surface design is adopted in the second gathering device, the fluorescent device is placed at the proper position within the focus of the second gathering device, emitted light can still be orderly but not crossed, and accordingly the needed optics purpose can be achieved through the rear end optical design. By means of the first gathering device, the focus of the laser incident near the optical axis can be moved forwards to the position of the fluorescent device.

Description

technical field [0001] The invention relates to the lighting field, in particular to a laser light source, a light emitting device and a lamp using the laser light source. Background technique [0002] Laser light sources have been used in automotive headlights and projection displays. The structure of a common laser light source is as follows figure 1 shown. The laser light 121 is incident on the convex lens groups 101 and 102, and is focused on the fluorescent device 103 at the focal point of the convex lens groups through the convex lens groups. The fluorescent device 103 is excited to emit the stimulated light 122 , and the stimulated light 122 is reflected at all angles, most of which are collected by the convex lens groups 101 and 102 and collimated to exit. The dichroic filter located between the laser emitting source and the optical path of the convex lens group is used to transmit the laser light 121 and reflect the received light 122 to separate the two optical ...

AI Technical Summary

Problems solved by technology

Glass aspheric lenses are difficult and costly to process

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