CN210567668U

CN210567668U - Refraction type laser white light source

Info

Publication number: CN210567668U
Application number: CN201922060576.8U
Authority: CN
Inventors: 潘康庆; 梁小婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-05-19
Anticipated expiration: 2029-11-25

Abstract

The utility model discloses a refraction type laser white light source, which comprises a laser source, a light source and a light distribution unit, wherein the laser source is used for emitting blue light beams, and a condensing lens, a first reflection unit, a second reflection unit, a wavelength conversion unit and a light distribution unit are sequentially connected in the transmission light path of the light beams; the second reflection unit is arranged on a transmission light path between the wavelength conversion unit and the light distribution unit; the wavelength conversion unit comprises a fluorescent reflector and a first light distribution lens, and the first light distribution lens is arranged on a reflecting surface of the fluorescent reflector; through the arrangement, the light source can meet the requirements of small power, small size and long-distance irradiation of the lighting equipment, and meanwhile, the light emitting efficiency and the central light intensity are ensured.

Description

Refraction type laser white light source

Technical Field

The utility model relates to a laser illumination field, in particular to laser white light source of refraction formula.

Background

With the development of semiconductor technology, LED light sources are widely used due to their advantages of high efficiency, energy saving, environmental protection, low cost, long service life, etc., and become a general illumination light source. However, in the fields of stage lighting, automobile high beam, searchlighting and the like, small-angle diffusion of a light source is often required to be realized so as to meet the requirement of long-range emission; and adopt LED design light source, in order to satisfy above-mentioned demand, need carry out complicated processing to the light path, need satisfy high-power and complicated heat dissipation, often the structure is complicated, has increased the volume.

It is seen that improvements and enhancements to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing disadvantages of the prior art, an object of the present invention is to provide a refraction type laser white light source, which is designed to satisfy the requirements of small power, small size and remote irradiation, and ensure the light extraction efficiency and central light intensity.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a refraction type laser white light source comprises a laser source, a first reflecting unit, a second reflecting unit, a wavelength conversion unit and a light distribution unit, wherein the laser source is used for emitting a blue light beam; the second reflection unit is arranged on a transmission light path between the wavelength conversion unit and the light distribution unit; the wavelength conversion unit comprises a fluorescent reflector and a first light distribution lens, and the first light distribution lens is arranged on a reflecting surface of the fluorescent reflector.

The refraction type laser white light source is characterized in that the first reflection unit comprises a reflector and a first light homogenizing sheet; the first light homogenizing sheet is arranged on the reflecting surface of the reflecting mirror, and the transmission light path of the light beam is reflected by the reflecting surface of the reflecting mirror and is emitted to the second reflecting unit from the first light homogenizing sheet.

The refraction type laser white light source is characterized in that the second reflection unit comprises a reflection prism and a second light homogenizing sheet; the second light homogenizing sheet is arranged on the back surface of the reflecting prism opposite to the reflecting surface of the reflecting prism, and the surface area of the second light homogenizing sheet is larger than that of the reflecting surface of the reflecting prism; and the transmission light path of the light beam is reflected by the fluorescent reflector and is emitted to the light distribution unit through the second light homogenizing sheet.

The refraction type laser white light source is characterized in that the light distribution unit is a second light distribution lens, and one side of the emergent surface of the second light distribution lens is provided with a light filter.

The refraction type laser white light source is characterized in that the light distribution unit is a light cup, one end of the light cup is open, the other end of the light cup is provided with a light through hole, and the light beam is emitted into the light cup through the light through hole.

The refraction type laser white light source is characterized in that the light distribution unit comprises a second light distribution lens and a light cup; one end of the light cup is opened, the other end of the light cup is provided with a light through hole, and the light beam is emitted into the light cup through the light through hole; the second light distribution lens is arranged at the opening end of the light cup, and a light filter is arranged on one side of the emergent surface of the second light distribution lens.

The refraction type laser white light source is characterized in that the front surface of the fluorescent reflection sheet is a fluorescent layer, the back surface of the fluorescent reflection sheet is a heat dissipation layer, and the fluorescent layer is attached to the heat dissipation layer.

An illumination device, comprising a housing and a refractive laser white light source as described above disposed within the housing.

Has the advantages that:

compared with the prior art, the utility model has the advantages that the first reflection unit, the second reflection unit and the wavelength conversion unit are arranged, the first reflection unit and the second reflection unit optimize the transmission light path, and the volume of the lighting equipment is convenient to reduce; meanwhile, a first light distribution lens is arranged on the fluorescent emission sheet to distribute light to the converted white light, so that the influence of the second reflection unit on the transmission of a light path is reduced, the volume is reduced, and the light emitting efficiency is ensured; in conclusion, the light source can meet the requirements of small size and long-distance irradiation of the lighting equipment, and meanwhile, the light emitting efficiency and the central light intensity are ensured.

Drawings

Fig. 1 is a schematic light path diagram of a first embodiment of a refractive laser white light source according to the present invention.

Fig. 2 is a schematic light path diagram of a second embodiment of a refractive laser white light source according to the present invention.

Fig. 3 is a schematic light path diagram of a third embodiment of a refractive laser white light source according to the present invention.

Description of the main element symbols: 100-laser source, 200-condenser lens, 300-first reflection unit, 310-reflector, 320-first light homogenizing sheet, 400-second reflection unit, 410-reflection prism, 420-second light homogenizing sheet, 500-wavelength conversion unit, 510-fluorescent reflection sheet, 511-heat dissipation layer, 512-fluorescent layer, 520-first light distribution lens, 600-light distribution unit, 610-second light distribution lens, 620-filter, 630-light cup and 631-light through hole.

Detailed Description

The utility model provides a laser white light source of refraction formula, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the embodiment is lifted to follow with the reference to the attached drawing the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, the present invention provides a refractive laser white light source, which includes a laser source 100 for emitting a blue light beam, and a condensing lens 200, a first reflection unit 300, a second reflection unit 400, a wavelength conversion unit 500 and a light distribution unit 600 are sequentially connected in a transmission light path of the light beam; the second reflecting unit 400 is disposed on a transmission light path between the wavelength conversion unit 500 and the light distribution unit 600; the wavelength conversion unit 500 includes a fluorescent reflector 510 and a first light distribution lens 520, and the first light distribution lens 520 is disposed on a reflection surface of the fluorescent reflector 510.

It should be noted that the laser source 100 is preferably a blue laser.

Referring to fig. 1-3, the present invention employs a laser source 100, which is a light source with good monochromaticity, high brightness, good directivity, small divergence, concentrated light, and good directivity, and can meet the requirement of remote illumination; compared with an LED light source, the LED light source can achieve higher brightness under the condition of the same power. In application, the laser source 100 emits a beam to the condensing lens 200, and the condensing lens 200 condenses the beam to reduce the diffusion of the beam; the converged light beams are reflected by the first reflecting unit 300 and the second reflecting unit 400 in sequence, so that the light path is changed, and the volume of the equipment is reduced conveniently; the reflected light beams are emitted to the fluorescent reflector 510 to be excited to obtain white light, and the white light is subjected to primary light distribution through the first light distribution lens 520 when being emitted, so that the white light is prevented from being concentrated, and the influence of the second reflecting unit 400 on a transmission light path of the white light emitted to the light distribution unit 600 is reduced; the white light after the last light distribution is subjected to secondary light distribution emission illumination through the light distribution unit 600. It should be noted that, in practice, since the light beams before passing through the first light distribution lens 520 are converged and the light beams are concentrated, the volume of the second reflection unit 400 can be set small, and the influence on the white light transmission light path is further reduced. Through the arrangement, the light source can meet the requirements of small size and long-distance irradiation of the lighting equipment, and meanwhile, the light emitting efficiency and the central light intensity are guaranteed.

Referring to fig. 1-3, in some embodiments, the first reflecting unit 300 includes a mirror 310 and a first light homogenizing plate 320; the first light homogenizing sheet 320 is disposed at the reflection surface of the reflector 310, and the transmission light path of the light beam is reflected by the reflection surface of the reflector 310 and emitted from the first light homogenizing sheet 320 to the second reflection unit 400. The light beam is homogenized through the first light homogenizing sheet 320, so that the light beam enters the second reflecting unit 400 in parallel, and the light emitting efficiency is improved.

In this embodiment, the reflector 310 is preferably a 45 ° reflector 310.

Further, in some embodiments, the second reflecting unit 400 includes a reflecting prism 410 and a second light uniformizing sheet 420; the second light homogenizing sheet 420 is arranged on the back surface of the reflecting prism 410 opposite to the reflecting surface of the reflecting prism, and the surface area of the second light homogenizing sheet 420 is larger than that of the reflecting surface of the reflecting prism 410; the transmission path of the light beam is reflected by the fluorescent reflector 510 and then emitted to the light distribution unit 600 through the second light homogenizing plate 420. Through the arrangement, the light beams are emitted into the fluorescent reflector 510 through the reflector prism 410, and the converted white light is homogenized through the second light homogenizing plate 420 after passing through the first light distribution lens 520, so that the uniformity of light spots is improved, and the light emitting quality is improved.

It should be noted that, in practical applications, the volume of the reflection prism 410 can be set to be small, which does not affect the emission of the white light from the second light uniformizing sheet 420, and reduces the influence of the reflection prism 410 on the emitted light.

The light distribution unit includes the following embodiments:

in the first embodiment, referring to fig. 1, the light distribution unit 600 may be configured as a second light distribution lens 610, and a filter 620 is disposed on one side of an emission surface of the second light distribution lens 610. According to practical application, white light can be applied to illumination of different scenes after being distributed by the second light distribution lens 610, and the second light distribution lens 610 can be set to be a concave-convex lens, a plano-convex lens, a biconvex lens and the like as required. In addition, since the blue laser is converted by the wavelength conversion unit 500 to obtain the white light, the white light has a small amount of blue light, which is easily harmful to the glasses of a person, and the output of the blue light is reduced by the optical filter 620, thereby protecting the eyes of the person.

In the second embodiment, referring to fig. 2, the light distribution unit 600 may be configured as a light cup 630, one end of the light cup 630 is open, and the other end of the light cup 630 is provided with a light through hole 631, and the light beam is incident into the light cup 630 through the light through hole 631; the white light is distributed through the light cup 630, and different light distribution curves can be obtained by adjusting the light cup 630 according to actual needs.

In the third embodiment, referring to fig. 3, the light distribution unit 600 includes a second light distribution lens 610 and a light cup 630; one end of the light cup 630 is open, and the other end of the light cup 630 is provided with a light through hole 631, and the light beam is emitted into the light cup 630 through the light through hole 631; the second light distribution lens 610 is arranged at the opening end of the light cup 630, and a light filter 620 is arranged on one side of the emergent surface of the second light distribution lens; meanwhile, the light cup 630 and the second light distribution lens 610 are combined to distribute light to the white light.

Referring to fig. 1-3, in some embodiments, the fluorescent reflector 510 has a front surface formed with a fluorescent layer 512 and a back surface formed with a heat dissipation layer 511, and the fluorescent layer 512 is attached to the heat dissipation layer 511; the heat dissipation layer 511 is preferably a metal plate, and plays a certain role in heat dissipation, thereby reducing the influence of heat generation on the fluorescent layer 512 and reducing the influence of heat decay on the light quality.

Preferably, the phosphor layer 512 is a ceramic phosphor layer 512, and the ceramic phosphor layer 512 is formed by sintering ceramic and phosphor at a high temperature and has a high temperature resistance. Since the light beam itself has energy, especially, the blue laser with high energy density is used to convert white light, when the light beam is emitted to the phosphor layer 512, the temperature of the phosphor layer 512 rises and thermal decay occurs, which leads to the decrease of the light beam conversion rate, and the high temperature resistant characteristic of the ceramic phosphor layer 512 can effectively reduce the influence of the temperature on the phosphor layer 512.

The utility model also provides a lighting device, which comprises a shell and the refraction type laser white light source arranged in the shell; since the refractive laser white light source is described in detail above, it is not described herein again.

It is understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions shall fall within the scope of the present invention.

Claims

1. A refraction type laser white light source is characterized by comprising a laser source, a first reflecting unit, a second reflecting unit, a wavelength conversion unit and a light distribution unit, wherein the laser source is used for emitting a blue light beam; the second reflection unit is arranged on a transmission light path between the wavelength conversion unit and the light distribution unit; the wavelength conversion unit comprises a fluorescent reflector and a first light distribution lens, and the first light distribution lens is arranged on a reflecting surface of the fluorescent reflector.

2. The refractive laser white light source of claim 1, wherein the first reflecting unit comprises a reflector and a first light uniformizing sheet; the first light homogenizing sheet is arranged on the reflecting surface of the reflecting mirror, and the transmission light path of the light beam is reflected by the reflecting surface of the reflecting mirror and is emitted to the second reflecting unit from the first light homogenizing sheet.

3. The refractive laser white light source of claim 2, wherein the second reflection unit comprises a reflection prism and a second light uniformizing sheet; the second light homogenizing sheet is arranged on the back surface of the reflecting prism opposite to the reflecting surface of the reflecting prism, and the surface area of the second light homogenizing sheet is larger than that of the reflecting surface of the reflecting prism; and the transmission light path of the light beam is reflected by the fluorescent reflector and is emitted to the light distribution unit through the second light homogenizing sheet.

4. The refraction type laser white light source according to claim 3, wherein the light distribution unit is provided as a second light distribution lens, and a filter is provided on one side of an emergent surface of the second light distribution lens.

5. The refraction type laser white light source according to claim 3, wherein the light distribution unit is configured as a light cup, one end of the light cup is open, the other end of the light cup is provided with a light through hole, and the light beam is emitted into the light cup through the light through hole.

6. The refraction type laser white light source according to claim 3, wherein the light distribution unit comprises a second light distribution lens and a light cup; one end of the light cup is opened, the other end of the light cup is provided with a light through hole, and the light beam is emitted into the light cup through the light through hole; the second light distribution lens is arranged at the opening end of the light cup, and a light filter is arranged on one side of the emergent surface of the second light distribution lens.

7. The refraction-type laser white light source according to claim 1, wherein the fluorescent reflector has a front surface formed by a fluorescent layer and a back surface formed by a heat dissipation layer, and the fluorescent layer is attached to the heat dissipation layer.

8. An illumination device comprising a housing and a refractive laser white light source according to any one of claims 1 to 7 disposed within the housing.