High-brightness white-light source with optical waveguide

Abstract

The invention relates to a high-brightness white-light source with an optical waveguide. The high-brightness white-light source is characterized by comprising an excitation light source and an optical waveguide corresponding to the excitation light source, wherein the optical waveguide is provided with an incident port and an emitting port; a white-light excitation body internally provided with fluorescent powder is connected to the emitting port of the optical waveguide; the light emitted by the excitation light source is transmitted through the optical waveguide to excite the fluorescent powder in the white-light excitation body so as to be combined to form the white light. The high-brightness white-light source with the optical waveguide is high in optic-electro conversion efficiency and luminous flux; the fluorescent powder is far from the excitation light source and can be in a deferred degradation without being cooled; the high-brightness white-light source is a compact structure, and is very suitable for the place required for introducing the white light through the optical waveguide.

Description

technical field [0001] The invention relates to a high-brightness white light source with an optical waveguide. Background technique [0002] Lighting is ubiquitous in modern human life. Since the human eye can only sense light in the visible light band, it is necessary to use a light source for illumination in many occasions when the light is weak. In order to better distinguish the essence of objects, including their own color and texture, white light lighting is the most commonly used lighting source. Home, medical, automotive, marine, and industrial applications all require high-brightness white light sources with optical waveguides. For example, the endoscope light source used in medicine. [0003] Traditional white light sources with optical waveguides generally use incandescent bulbs, and sometimes use reflectors or focusing lenses to converge the light beams, then guide them into optical waveguides, and guide them to the parts that need to be illuminated. With th...

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Problems solved by technology

Both of these methods will greatly increase the cost and the complexity of the system. Since the excited white light is randomly emitted around the space, its divergence angle is the entire space angle, so even if a focusing device is used, it can only gather a few A small part enters the optical waveguide; the method of focusing the excitation light source to the end face of the optical waveguide not only only has light that is less than a solid angle of the entrance angle of the optical waveguide to enter the optical waveguide, the coupling efficiency is very low; moreover, due to the excitation after focusing The energy of the light source is highly concentrated in a small area of ​​the phosphor, and the phosphor in this area is prone to aging, which affects the life of the entire light source

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