CN110780510A

CN110780510A - Flash lamp based on semiconductor laser

Info

Publication number: CN110780510A
Application number: CN201911006352.7A
Authority: CN
Inventors: 汪莱; 王磊; 郝智彪; 罗毅
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-02-11

Abstract

The invention discloses a flash lamp based on a semiconductor laser, which comprises: semiconductor laser, sapphire fluorescent screen, speculum and fresnel lens, wherein, semiconductor laser is placed in to the sapphire fluorescent screen in the place ahead for blue laser who jets out semiconductor laser converts white light into, and sapphire fluorescent screen the place ahead is placed in to the speculum, is used for with white light reflection to fresnel lens on, with white light divergence and jets out. The flash lamp has the advantages of high luminous efficiency, high power, long service life, energy conservation, good color rendering property, long range and the like, and can realize larger luminous flux and longer working distance.

Description

Flash lamp based on semiconductor laser

Technical Field

The invention relates to the technical field of flash lamps, in particular to a flash lamp based on a semiconductor laser.

Background

The flash lamp is a light source which can emit strong light in a short time, is mainly used for instant illumination in occasions with darker light and is also used for local light supplement of shot objects in occasions with brighter light. The appearance is small and exquisite, and is safe in utilization, convenient to carry, the stable performance. The flash lamp is used as a light, small, stable and safe light source, is widely used as photographic accessories of photographic light sensing, and is embedded in mobile phones, camera lamps and other equipment. The camera is used for illumination or photography in scenes with insufficient visual conditions, such as at night.

The internal light source of the existing general flash lamp usually adopts a blue LED as a luminous source, but the internal light source has the problems of low luminous power, limited output light quantity and small range. Especially, in recent years, the telephoto lens is largely used in terminals such as mobile phones, and the traditional LED flash lamp is difficult to supplement light for objects and scenes in a distance, so that the effect of the telephoto lens is not good when the telephoto lens shoots a dark scene in a distance. In addition, flash lamps that employ blue LEDs as light sources typically have poor color rendering.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the invention aims to provide a flash lamp based on a semiconductor laser.

In order to achieve the above object, the present invention provides a flash lamp based on a semiconductor laser, comprising: semiconductor laser, sapphire fluorescent screen, speculum and fresnel lens, wherein, sapphire fluorescent screen arranges in semiconductor laser place ahead is used for with the blue laser conversion that semiconductor laser jetted out is white light, the speculum is arranged in sapphire fluorescent screen place ahead is used for with white light reflection extremely on the fresnel lens, will white light divergence jets out.

According to the semiconductor laser-based flash lamp provided by the embodiment of the invention, through the characteristic of high concentration of the light emitted by the semiconductor laser in the light emitting direction, the white light emitted by the flash lamp can be more concentrated, and meanwhile, due to the large light power of the semiconductor laser, the larger luminous flux and the longer working distance can be realized, so that the semiconductor laser-based flash lamp can be widely applied to the shooting and lighting scenes of mobile equipment such as mobile phones and tablet computers, and the light supplementing lamps of cameras and cameras.

In addition, the flash lamp based on the semiconductor laser according to the above embodiment of the present invention may further have the following additional technical features:

further, in one embodiment of the present invention, the sapphire fluorescent plate is provided with a double-side polished sapphire lens.

Further, in one embodiment of the present invention, the sapphire fluorescent plate is sintered with a fluorescent material, and is excited by the blue laser to emit yellow light, so that the combination of yellow light and blue light is converted into white light.

Further, in an embodiment of the present invention, the method further includes: the driving module is connected with the semiconductor laser and used for controlling the semiconductor laser to emit blue laser; the casing, semiconductor laser, the sapphire fluorescent screen, the speculum with drive module arranges in inside the casing, fresnel lens imbeds the conch wall of casing top.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a flash lamp structure based on a semiconductor laser according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A semiconductor laser-based flash lamp according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a flash lamp structure based on a semiconductor laser according to an embodiment of the present invention.

As shown in fig. 1, the semiconductor laser-based flash lamp 10 includes: a semiconductor laser 100, a sapphire fluorescent plate 200, a reflecting mirror 300, and a fresnel lens 400.

The sapphire fluorescent plate 200 is disposed in front of the semiconductor laser 100 and is configured to convert blue laser emitted from the semiconductor laser 100 into white light, and the reflector 300 is disposed in front of the sapphire fluorescent plate 200 and is configured to reflect the white light onto the fresnel lens 400 and emit the white light in a divergent manner.

Furthermore, the sapphire fluorescent plate provided by the embodiment of the invention is provided with the sapphire lenses with two polished surfaces, and has the advantages of high light transmittance, high mechanical strength, stability and the like.

The sapphire fluorescent plate is sintered with a fluorescent material, and can emit yellow light when being excited by blue laser, so that the yellow light and the blue light are combined and converted into white light. Meanwhile, the white light scheme of blue laser and yellow fluorescent powder can also realize high color rendering performance.

Further, in an embodiment of the present invention, the method further includes: the driving module is connected with the semiconductor laser and used for controlling the semiconductor laser to emit blue laser; the shell, semiconductor laser, sapphire fluorescent screen, speculum and drive module arrange inside the shell in, the conch wall of fresnel lens embedding shell top.

Specifically, in the embodiment of the present invention, the semiconductor laser 100, the sapphire fluorescent panel 200, the reflector 300, and the driving module 400 are disposed inside the housing 500, the fresnel lens 600 is embedded in a housing wall above the housing, the semiconductor laser 100 is used as a flash light source to emit blue laser, the semiconductor laser 100 is driven by the flash light driving circuit 400, so as to implement functions of fast turning on and off of a flash light, adjusting light power, and the like, the sapphire fluorescent panel 200 is disposed in front of the semiconductor laser 100, a fluorescent material is sintered on the sapphire fluorescent panel 200, and is excited by the blue laser to emit yellow light, so as to combine the yellow light and the blue light into white light, the reflector 300 is disposed in front of the sapphire fluorescent panel 200, and the white light is reflected by the reflector, then emitted outside the housing 500 through the fresnel lens 600, and implements.

According to the flash lamp based on the semiconductor laser, the white light emitted by the flash lamp can be more converged by the characteristic of high concentration of the light emitted by the semiconductor laser in the light emitting direction, and meanwhile, due to the large light power of the semiconductor laser, the flash lamp can realize larger luminous flux and longer working distance, and can be widely applied to camera shooting and lighting scenes of mobile equipment such as mobile phones and tablet computers and light supplementing lamps of cameras and cameras.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A semiconductor laser based flash lamp comprising: semiconductor laser, sapphire fluorescent screen, speculum and fresnel lens, wherein, sapphire fluorescent screen arranges in semiconductor laser place ahead is used for with the blue laser conversion that semiconductor laser jetted out is white light, the speculum is arranged in sapphire fluorescent screen place ahead is used for with white light reflection extremely on the fresnel lens, will white light divergence jets out.

2. A semiconductor laser-based flash lamp as claimed in claim 1 wherein the sapphire phosphor plate is provided with a double-side polished sapphire lens.

3. The semiconductor laser-based flash lamp of claim 1, wherein the sapphire phosphor plate has a phosphor material sintered thereon, and is excited by the blue laser light to emit yellow light, such that the combination of yellow and blue light is converted into white light.

4. A semiconductor laser-based flash lamp as claimed in claim 1, further comprising:

the driving module is connected with the semiconductor laser and used for controlling the semiconductor laser to emit blue laser;

the casing, semiconductor laser, the sapphire fluorescent screen, the speculum with drive module arranges in inside the casing, fresnel lens imbeds the conch wall of casing top.