A system for obtaining high lumen density green light source

Abstract

The invention discloses a system for obtaining a high-lumen-density green light source. The system comprises a heat dissipation base, a laser diode module and a fluorescent ceramic plate; the heat dissipation base is composed of and assembled with two tungsten-copper heat sinks which are symmetrical in structure, a cavity body with only one opening in one side is formed inside the heat dissipationbase, and a plurality of small holes with the same structure are uniformly distributed on the upper inner wall and the lower inner wall of the cavity body; the laser diode module is composed of a plurality of identical laser diode chips, the laser diode chips are all fixed in the small holes in the upper inner wall and the lower inner wall of the cavity body of the heat dissipation base, and theupper row of chips and the lower row of chips are arranged in a staggered mode; the fluorescent ceramic plate is horizontally fixed at the center position of the cavity body of the heat dissipation base, the two ends of the fluorescent ceramic plate are precisely polished, the end part of one end, extending into the cavity body of the heat dissipation base, of the fluorescent ceramic plate is plated with a film layer I, and the other end of the fluorescent ceramic plate is used as a light outlet; and the film layer I is an aluminum film. According to the system, a light path is designed according to the internal total reflection phenomenon of the fluorescent ceramic, simplicity and efficiency are achieved, and the high-lumen-density green light source with low optical expansion amount is obtained.

Description

technical field [0001] The invention relates to the field of lighting, in particular to a system for obtaining a green light source with high lumen density. Background technique [0002] Green light sources are widely used in projection, endoscopy, plant lighting and other fields. At present, the green light sources on the market generally use infrared lasers with a wavelength of 808nm to excite nonlinear crystals to generate 1064nm infrared light, and then generate 532nm green light after frequency doubling, which belongs to solid-state lasers and has low efficiency; It requires a higher indium composition; this induces a major physical change that changes the lattice constant and shortens the bandgap, and is not very efficient. With the continuous exploration of blue LED / LD by researchers, the WPE (wall-plug efficiency) has been improved by several orders of magnitude. Therefore, the green light source obtained by fluorescent conversion has higher efficiency. However, wi...

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Problems solved by technology

However, the optical path of this scheme is complicated, and in order to avoid the stray light problem caused by material scattering, optical components such as ground glass diffuser and dichroic mirror are used, which further increases the energy loss in the optical path; if this scheme is used to obtain high lumen density Green light source, need to further simplify the design of the optical path

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