CN112628621A

CN112628621A - Laser light source device

Info

Publication number: CN112628621A
Application number: CN202110047431.3A
Authority: CN
Inventors: 程波涛
Original assignee: Suzhou Shiao Optoelectronic Technology Co ltd
Current assignee: Suzhou Shiao Optoelectronic Technology Co ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-04-09

Abstract

The invention discloses a laser light-emitting source device which comprises at least one laser diode, at least one collimating lens, a laser condenser group, a light wavelength conversion module, a light diffusion module, a dichroic mirror, a first special-shaped reflector and a second special-shaped reflector, wherein the light wavelength conversion module is positioned at the focus of the first special-shaped reflector, the light diffusion module is positioned at the focus of the second special-shaped reflector, the optical axes of the first special-shaped reflector and the second special-shaped reflector are mutually vertical, laser emitted by the laser diode is collimated by the collimating lens and then parallelly enters the laser condenser group to form a converged laser beam, and a part of the converged laser beam is converged on the light wavelength conversion module to excite the light conversion module to emit fluorescence. This technical scheme only uses a set of laser condensing lens, both can be to the laser focus of distributing wavelength conversion module, can save lens quantity again to the laser focus of distributing the light diffusion module, the cost is reduced.

Description

Laser light source device

Technical Field

The invention relates to a laser light-emitting light source device which can be used in the technical field of laser light-emitting illumination.

Background

In recent years, an LED light source is replacing a traditional incandescent lamp and an energy-saving lamp to become a novel lighting source, and as a general lighting source, the LED light source has the advantages of high efficiency, energy saving, environmental protection, long service life and the like. But the electro-optic efficiency of an LED limits its own light emission brightness. In some application fields requiring high brightness light sources, such as outdoor searchlights, stage lights, automobile high beams, large-size projection displays and other fields, the LEDs cannot meet the requirements. Laser illumination using semiconductor laser diodes has many advantages, such as fast response speed, high illumination brightness, small lamp size, obvious energy saving effect, and both brightness and color temperature and illumination effect in accordance with human visual habits. The point light source with small optical expansion amount (light-emitting area angular area) and high brightness can be obtained by utilizing the laser excitation fluorescent powder technology, and can be used in the application field needing high-brightness illumination.

The laser excited fluorescent powder technology focuses laser on a fluorescent powder layer to form a point light source with a small light emitting point, the fluorescent powder is excited to generate high-brightness radiation light, and the fluorescent light is approximately in Lambert distribution. Common excitation modes are: the blue laser excites the yellow phosphor, producing a yellow radiation spectrum. According to the principle of color complementation, if a part of blue light is mixed, white light can be formed, and then the emission is collected by an optical system, so that a white light source is formed.

In laser fluorescent projection display, phosphor is usually coated on a rotating color wheel for heat dissipation, and a blue light part in synthesized white light is formed by rotating the color wheel in a time-sharing manner, so that the structure is complex and is not suitable for static illumination.

Some current static illumination light source schemes collect yellow and white light emitted by fluorescent radiation by using a plurality of lenses, the lenses are limited in caliber in practical installation due to the relative parallel arrangement of the lenses and the fluorescent materials, and the reflected light emitted by the fluorescent materials is in lambertian divergence of 180 degrees, so that the collection efficiency of the radiated fluorescence is influenced by the numerical aperture of the lenses. And a condenser lens group is required for wavelength conversion light collection and color combination scattered laser collection, which increases the number of lenses and the cost. In addition, when the laser excites the fluorescent material to emit light, if oblique incidence is adopted, the focused focus has oblique distortion, which is equivalent to enlarging the size of a focus point light source, is not beneficial to collimation of output light beams and influences the light efficiency.

Disclosure of Invention

The present invention is directed to solving the above-mentioned problems of the prior art and to providing a laser light source device.

The purpose of the invention is realized by the following technical scheme: the laser light-emitting source device comprises at least one laser diode and a collimating lens matched with the laser diode, a laser condenser group, a light wavelength conversion module, a light diffusion module, a dichroic mirror, a first special-shaped reflector and a second special-shaped reflector, wherein the light wavelength conversion module is positioned at the focus of the first special-shaped reflector, the light diffusion module is positioned at the focus of the second special-shaped reflector, the optical axes of the first special-shaped reflector and the second special-shaped reflector are mutually vertical, laser emitted by the laser diode is collimated by the collimating lens and then parallelly enters the laser condenser group to form a converged laser beam, and part of the converged laser beam after passing through the dichroic mirror is converged on the light wavelength conversion module to excite fluorescence with the radiation wavelength within the range of 470-720 nm, and the fluorescence is reflected by the first special-shaped reflector and emitted towards the dichroic; the other part of the light is converged on the light diffusion module to form diffused light, the diffused light is reflected by the second special-shaped reflector, is emitted towards the dichroic mirror as parallel light, and is combined by the dichroic mirror to form mixed parallel light for output.

Preferably, the positions of the optical wavelength conversion module and the optical diffusion module can be interchanged.

Preferably, a plane mirror and a concave mirror are arranged on a light path between the collimating lens and the dichroic mirror, laser light emitted by the laser diode is collimated by the collimating lens and then enters the plane mirror in parallel, and then enters the concave mirror after being reflected by the plane mirror, and then is reflected by the concave mirror to form a converged laser beam, a part of the converged laser beam is converged on the optical wavelength conversion module under the action of the dichroic mirror to excite radiation fluorescence, and the other part of the converged laser beam is converged on the optical diffusion module to form diffused light.

Preferably, a first plane mirror and a second plane mirror are arranged on a light path between the collimating lens and the laser condenser group, laser emitted by the laser diode is collimated by the collimating lens and then enters the first plane mirror in parallel, the laser is reflected by the first plane mirror and then enters the second plane mirror, parallel light reflected by the second plane mirror passes through the laser condenser group to form a converged laser beam, a part of the converged laser beam is converged on the optical wavelength conversion module to excite radiation fluorescence after being acted by the dichroic mirror, and the other part of the converged on the optical diffusion module to form diffused light; wherein the first planar mirror rotates about one axial direction and the second planar mirror rotates about another axial direction perpendicular to the axial direction.

Preferably, the laser device comprises more than two laser diodes which are randomly arranged in space and a matched collimating lens, wherein a plurality of strands of parallel light emitted by the laser diodes in a corresponding quantity are incident to a laser condenser lens to form a plurality of strands of converged laser beams, and all the converged laser beams are respectively focused on the optical wavelength conversion module and the optical diffusion module after being acted by the dichroic mirror.

Preferably, all the laser diodes have the same wavelength or a combination of different wavelengths, and the wavelength range of light emitted by the laser diodes is 280-470 nm; the individual laser diodes involved are controlled independently, including switching, signal modulation, drive current increase or decrease.

Preferably, the laser condenser group is composed of a single lens, or a combination of a plurality of lenses, or an aspheric lens, or a combination of a spherical lens and an aspheric lens, or a combination of all positive lenses, or a combination of a positive lens and a negative lens, or a concave reflecting condenser; the focal length of the laser condenser set is determined according to the central distance between the laser condenser set and the dichroic mirror and the distance between the dichroic mirror and the optical wavelength conversion module or the optical diffusion module.

Preferably, the dichroic mirror is a parallel flat plate or a cube prism including a 45 ° splitting plane, and an optical axis of the dichroic mirror forms an included angle of 45 ° with respect to a central optical axis of the condenser lens group, where the parallel flat plate includes a first surface and a second surface, and at least one of the surfaces is capable of splitting incident laser light to allow a part of the incident laser light to be reflected and another part of the incident laser light to be transmitted.

Preferably, the optical wavelength conversion module at least comprises an optical wavelength conversion material unit and a material fixing and heat dissipation module, and a first special-shaped reflector is arranged on the outer side of the optical wavelength conversion module in a surrounding manner; the first special-shaped reflector is a parabolic reflector with a reflecting film plated on the inner surface or a combined reflector; the wavelength conversion material unit is arranged at the focus of the first special-shaped reflector, and the fluorescence of the excited radiation is reflected and emitted out towards the dichroic mirror as parallel light.

Preferably, the light diffusion module at least comprises a light diffusion material unit and a diffusion material fixing and heat dissipation module, and the outer side of the light diffusion module is surrounded by a second special-shaped reflector; the second special-shaped reflector is a parabolic reflector with a reflecting film plated on the inner surface or a combined reflector; the light diffusion material unit is arranged at the focus of the second special-shaped reflector, and the diffused light is reflected and emitted out towards the dichroic mirror as parallel light.

The technical scheme of the invention has the advantages that: this technical scheme only uses a set of laser condensing lens, both can be to the laser focus of distributing wavelength conversion module, can save lens quantity again to the laser focus of distributing the light diffusion module, the cost is reduced.

According to the technical scheme, holes do not need to be formed in the first special-shaped reflector and the second special-shaped reflector, laser beams can be incident and focused on the focal point of the reflector, the manufacturing process of the reflector is simplified, and the reflective area and the light effect are not reduced.

The technical scheme can ensure that laser is normally incident into the optical wavelength conversion material, reduces the distortion diffusion of oblique focusing, has better collimation of output radiation light and white light and higher luminous efficiency, and is favorable for subsequent further light beam conversion.

The technical scheme can set the mixed input of lasers with various wavelengths, supplement the deficiency of blue-violet in white light and ensure that the color development effect of the output white light is better.

Drawings

Fig. 1 is a schematic structural diagram of a laser light source device according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a second embodiment of a laser light source device according to the present invention.

Fig. 3 is a schematic structural diagram of a laser focusing mirror using a concave reflective mirror according to a third embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an adjustable biplane used as a laser mirror group according to a fourth embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a multi-laser and a multi-laser mirror according to a fifth embodiment of the present invention.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.

The invention discloses a laser light source device, as shown in fig. 1, the laser light source device comprises at least one laser diode and a collimating lens matched with the laser diode, a laser condenser group 104, an optical wavelength conversion module, an optical diffusion module, a dichroic mirror, a first special-shaped reflector and a second special-shaped reflector. The optical wavelength conversion module is positioned at the focus of the first special-shaped reflector, the optical diffusion module is positioned at the focus of the second special-shaped reflector, and the optical axes of the first special-shaped reflector and the second special-shaped reflector are perpendicular to each other. Laser emitted by the laser diode is collimated by the collimating lens and then parallelly enters the laser condenser group 104 to form a converged laser beam, one part of the converged laser beam is converged on the light wavelength conversion module to emit fluorescent light 109 under the action of the dichroic mirror, the other part of the converged laser beam is converged on the light diffusion module to form diffused light 113, and the fluorescent light 109 and the diffused light 113 are respectively output by the first special-shaped reflector and the second special-shaped reflector and then are combined through the dichroic mirror to form mixed parallel light.

In the technical scheme, the laser device can comprise one or more laser diodes, and the laser diodes can have the same wavelength or a combination of a plurality of different wavelengths. The wavelength range of the light emitted by the laser diode can be 400 nm-470 nm. The included laser diodes may be independently controlled including switching, signal modulation, drive current increase or decrease.

In the technical scheme, the laser device can comprise one or more collimating lenses, the collimating lenses are positioned behind the laser diodes, and the collimating lenses collimate the laser with the large divergence angle emitted by the laser diodes and then output the collimated laser as parallel light.

The laser beam emitted from the collimating lens can partially enter the reflecting mirror group firstly and then is reflected to enter the laser focusing mirror group. Or part of the light is directly incident to the laser condenser lens group. Or all the light beams can be reflected into the condenser lens group after being incident into the reflector lens group, or all the light beams can be directly incident into the condenser lens group.

The reflector group can be composed of 1 plane reflector or 2 mutually parallel reflectors, wherein one reflector can rotate around a certain axial direction, and the other reflector can rotate around the other axial direction which is vertical to the axial direction. It can also be combined by a plurality of independent mirrors distributed in a specific arrangement, which can be independently controlled by rotation.

The collimated laser beams incident to the laser condenser lens group can be all parallel to each other or partially parallel to each other. The light can be vertically incident to the condenser lens group, namely the incident direction is parallel to the central optical axis of the condenser lens group, and the light can also be incident to the condenser lens group at a certain angle.

And the laser condenser group is positioned between the laser and the dichroic mirror. The lens can be a single lens, or a combination of a plurality of lenses, or an aspherical lens, or a combination of a spherical lens and an aspherical lens. The lens can be a combination of positive lenses, a combination of positive lenses and negative lenses, or a concave reflecting condenser.

The laser condenser group has positive focal power, and the focal length of the laser condenser group is determined according to the central distance between the condenser group and the dichroic mirror and the distance between the dichroic mirror and the optical wavelength conversion module or the optical diffusion module.

The dichroic mirror is positioned behind the laser condenser lens group, can be a parallel flat plate, has an optical axis forming an included angle of 45 degrees relative to a central optical axis of the condenser lens group, and comprises a first surface and a second surface, wherein at least one surface can split incident laser light to enable one part of the incident laser light to be reflected and the other part of the incident laser light to be transmitted. The dichroic mirror may also be a cubic prism comprising a 45 ° splitting plane.

The optical wavelength conversion module at least comprises an optical wavelength conversion material unit and a material fixing and heat dissipation module, wherein the optical wavelength conversion material unit can be fluorescent ceramic or other luminescent materials. The laser beam is converged by the condenser lens group and then can be focused on the optical wavelength conversion material unit, so that the optical wavelength conversion unit can absorb the laser energy emitted by the laser and radiate fluorescence with the wavelength within the range of 470-720 nm.

The first shaped reflector is surrounded at the periphery of the optical wavelength conversion module, and the shaped reflector can be a parabolic reflector, and the inner surface of the shaped reflector is coated with a reflecting film, such as a metal silver film or a dielectric film. The combined reflector can be formed into an inner surface with a complex shape by adopting a precision compression molding technology. For example: a mirror assembled by a mosaic of many small flat mirrors, or others. The first special-shaped reflector has a focus, and light emitted from the focus is reflected by the inner surface of the reflector and then emitted in a direction of the dichroic mirror as parallel light.

The optical wavelength conversion material unit in the optical wavelength conversion module is arranged on the focus of the first special-shaped reflector or near the focus. When the fluorescence conversion material unit is excited by the incident laser, the emitted fluorescence is reflected by the inner wall of the first special-shaped reflector and then is emitted towards the dichroic mirror.

The light diffusion module at least comprises a light diffusion material unit and a diffusion material fixing and heat dissipation module. The light diffusing material unit contains a scattering material and a structure capable of diffusing the laser light. The laser beam is converged by the condenser lens group, can be focused on the light diffusion material unit, and then is diffused by scattering to generate diffused light for color combination.

The periphery of the light diffusion module is surrounded by a second special-shaped reflector which can be a parabolic reflector, and the inner surface of the special-shaped reflector is coated with a reflecting film, such as a metal silver film or a dielectric film. The combined reflector can be formed into an inner surface with a complex shape by adopting a precision compression molding technology. For example: a mirror assembled by a mosaic of many small flat mirrors, or others. The second special-shaped reflector has a focus, and light emitted from the focus is reflected by the inner surface of the reflector and then emitted in a direction of the dichroic mirror as parallel light.

And the light diffusion material unit in the light diffusion module is arranged on the focus of the second special-shaped reflector or near the focus. When the light diffusion material unit is irradiated by the incident laser, the generated diffused light with the same wavelength is reflected by the inner wall of the second special-shaped reflector and then is emitted towards the dichroic mirror.

The dichroic mirror has the following two schemes:

the first scheme is as follows: a part of the laser beam emitted from the laser condenser group is reflected by the dichroic mirror and then focused on the light wavelength conversion material unit, exciting the light wavelength conversion material to radiate and emit light. The other part is transmitted from the dichroic mirror, and the transmitted laser light is focused on the light diffusing material unit to generate diffused light for color combination.

The radiation after the light wavelength conversion emits light, is collected by the first special-shaped reflector and then emits as parallel light, and then is transmitted out from the dichroic mirror, at the moment, the optical axis of the first special-shaped reflector is vertical to the optical axis of the laser condenser lens group, and the diffused light for color combination is collected by the second special-shaped reflector and then emits as parallel light, and then is reflected out by the dichroic mirror. The optical axis of the second special-shaped reflector is superposed with the optical axis of the laser condenser lens group, and the radiation light transmitted by the dichroic mirror is superposed and combined with the reflected diffused light to generate white light for emergence.

The second scheme is as follows:

a part of the laser beam emitted from the laser condenser group is transmitted through the dichroic mirror, the transmitted laser beam is focused on the light wavelength conversion material unit to generate radiation light, the other part of the laser beam is reflected by the dichroic mirror, and the reflected laser beam is focused on the light diffusion material unit to generate diffused light.

The radiation light is collected by the first special-shaped reflector, then exits as parallel light, and then is reflected by the dichroic mirror, and at the moment, the optical axis of the first special-shaped reflector is superposed with the optical axis of the laser condenser lens group.

The diffused light is collected by the second special-shaped reflector and then emitted as parallel light, and then is transmitted out from the dichroic mirror, the optical axis of the second special-shaped reflector is perpendicular to the optical axis of the laser condenser lens group, and the radiation light reflected by the dichroic mirror is superposed and combined with the transmitted diffused light to be mixed to generate white light for emitting.

The color temperature and the color rendering effect of the output white light can be changed by changing the transmission and reflection proportion of the dichroic mirror, the position and the angle of the independent reflector in the reflector group can be changed, the angle of the output white light can be changed, and the output white light beams can be further subjected to beam transformation, including beam size compression, beam size expansion, beam focusing and re-collimation, and the like, so that the white light source can be applied to various illumination occasions.

The first embodiment is as follows:

as shown in fig. 1, a divergent laser beam emitted from a laser 101 is collected and collimated by a laser collimating mirror 102 to output a collimated laser beam 103, and the collimated laser beam 103 is perpendicularly incident to a laser condenser group 104. The laser condenser group 104 is located between the laser 101 and the dichroic mirror 105, and in the technical scheme, the wavelength of light emitted by the laser 101 is within a range of 400 nm-470 nm.

The laser condenser group 104 may be a single lens, or a combination of a plurality of lenses, or may be an aspheric lens, or a combination of a spherical lens and an aspheric lens, or may be a combination of all positive lenses, or a combination of a positive lens and a negative lens, or may be a concave reflective condenser. The laser condenser assembly 104 has positive focal power, and the focal length thereof is determined by the central distance between the condenser assembly 104 and the dichroic mirror 105 and the distance between the dichroic mirror 105 and the optical wavelength conversion module 107 or the optical diffusion module 111.

In this embodiment, the central optical axis of the laser beam 103 coincides with the central optical axis of the laser condenser assembly 104, the laser beam 103 is converged after passing through the laser condenser assembly 104, and before being focused, the laser beam is divided into two paths by the dichroic mirror 105, wherein one path is reflected to obtain a converging beam 106, and the other path is transmitted to obtain a transmitting beam 110.

The dichroic mirror 105 is located behind the laser condenser lens assembly 104, and in this embodiment, the dichroic mirror is a parallel flat plate or a cube prism including a 45 ° splitting plane, and an optical axis of the dichroic mirror forms an included angle of 45 ° with respect to a central optical axis of the condenser lens assembly, where the parallel flat plate includes a first surface and a second surface, and at least one of the surfaces can split incident laser light to allow one part to be reflected and the other part to be transmitted. In this embodiment, the first surface is a spectroscopic surface. The ratio of reflection and transmission of the laser beam by the dichroic mirror 105 may be determined according to design requirements, for example, 85% reflection and 15% transmission; further, the dichroic mirror may be a cubic prism including a 45 ° spectroscopic surface.

In this embodiment, the converging light beam 106 reflected by the dichroic mirror 105 is focused on the optical wavelength conversion module 107. The optical wavelength conversion module 107 includes an optical wavelength conversion material unit 107a and a material fixing and heat dissipating module 107b, wherein the optical wavelength conversion material unit 107a may be a fluorescent ceramic or other luminescent material. The converging light beam 106 can be focused on the optical wavelength conversion material unit 107a, so that the optical wavelength conversion unit can absorb the laser energy emitted by the laser and radiate the fluorescent light 109 with the wavelength within the range of 470 nm-720 nm.

A first special-shaped reflector 108 is arranged at the periphery of the optical wavelength conversion module 107, and the first special-shaped reflector 108 is a parabolic reflector with a reflecting film plated on the inner surface, such as a metal silver film or a dielectric film; or a combined reflector, and an inner surface with a complex shape is formed by adopting a precision compression molding technology, such as: a mirror assembled by a mosaic of many small flat mirrors, or others.

In this embodiment, the first shaped mirror 108 is a parabolic mirror having a focal point, and the optical wavelength conversion material unit 107a is disposed at or near the focal point of the first shaped mirror 108. When the fluorescence conversion material unit 107a is excited by the incident converging light beam 106, the emitted fluorescence 109 is reflected by the inner wall of the first irregularly shaped reflecting mirror 108 and then emitted as parallel light toward the dichroic mirror 105.

The light beam 110 split and transmitted from the dichroic mirror 105 is condensed and focused to the light diffusion block 111. The light diffusion module 111 at least comprises a light diffusion material unit 111a and a diffusion material fixing and heat dissipating module 111 b. The light diffusing material unit 111a has a scattering material and a structure capable of diffusing laser light.

A second special-shaped reflector 112 is arranged around the periphery of the light diffusion module 111, and the second special-shaped reflector 112 is a parabolic reflector with a reflecting film plated on the inner surface, such as a metal silver film or a dielectric film; or a combined reflector, and an inner surface with a complex shape is formed by adopting a precision compression molding technology, such as: a mirror assembled by a mosaic of many small flat mirrors, or others.

In this embodiment, the second shaped mirror 112 is a parabolic mirror having a focal point, and the light diffusing material unit 111a in the light diffusing module is disposed at or near the focal point of the second shaped mirror. The condensed light beam 110 is focused on the light diffusing material unit 111a, then diffused by diffuse reflection of scattering, generates diffused light 113, is collected and reflected by the inner wall of the second irregularly shaped reflecting mirror 112, and then exits as parallel light toward the dichroic mirror 105.

In the present embodiment, the radiant fluorescent light 109 after the optical wavelength conversion is reflected by the first special-shaped reflective mirror 108 and then output as parallel light, and can be completely transmitted out from the dichroic mirror 105, at this time, the optical axis of the first special-shaped reflective mirror 108 is perpendicular to the optical axis of the laser condenser assembly 104. The optical axis of the first profiled reflector 108 coincides with the optical axis of the converging excitation beam 106. The diffused light 113 for color combination is reflected by the dichroic mirror 112, and then exits as parallel light. The optical axis of the second special-shaped reflecting mirror 112 is coincident with the optical axis of the laser condenser group 104. The optical axis of the second irregularly shaped reflector 112 coincides with the optical axis of the converging beam 110.

The radiation light transmitted by the dichroic mirror is superposed and combined with the reflected diffused light, and the mixed light is mixed to generate white light 114 to be emitted.

Example two:

as shown in fig. 2, a divergent laser beam emitted from a laser 101 is collected and collimated by a laser collimating mirror 102 to output a collimated laser beam 103, and the laser beam 103 is perpendicularly incident on a laser condenser group 104. The laser condenser assembly 104 is located between the laser 101 and the dichroic mirror 105, and the laser condenser assembly 104 has positive focal power, and the focal length thereof depends on the central distance between the condenser assembly 104 and the dichroic mirror 201 and the distance between the dichroic mirror and the optical wavelength conversion module 107 or the optical diffusion module 111.

In this embodiment, the central optical axis of the laser beam 103 coincides with the central optical axis of the condenser lens assembly 104, the laser beam 103 is converged after passing through the laser condenser lens assembly 104, and before being focused, the laser beam is divided into two paths by the dichroic mirror 201, wherein one path is transmitted to obtain a converging beam 202, and the other path is reflected to obtain a reflected beam 204.

The dichroic mirror 201 is located behind the laser condenser lens assembly 104, in this embodiment, the dichroic mirror 201 is a parallel flat plate, an optical axis of the dichroic mirror 201 forms an included angle of 45 ° with respect to a central optical axis of the condenser lens assembly, the dichroic mirror 201 includes a first surface and a second surface, at least one of the surfaces can split incident laser light, and a part of the incident laser light is reflected and the other part of the incident laser light is transmitted, in this embodiment, the first surface is a splitting surface.

In this embodiment, the convergent light beam 202 transmitted from the dichroic mirror 201 is focused on the optical wavelength conversion module 107. The optical wavelength conversion module 107 includes an optical wavelength conversion material unit, and the converging light beam 202 can be focused on the optical wavelength conversion material unit, so that the optical wavelength conversion unit can absorb the laser energy emitted by the laser and radiate the fluorescence 203 with the wavelength within the range of 470nm to 720 nm.

A first shaped reflector 108 is disposed around the periphery of the optical wavelength conversion module 107, and in this embodiment, the first shaped reflector 108 is a parabolic reflector. The optical wavelength conversion material unit in the optical wavelength conversion module is arranged on the focus of the first special-shaped reflector 108 or near the focus. When the fluorescence conversion material unit is excited by the incident laser 202, the emitted fluorescence 203 is reflected by the inner wall of the first special-shaped reflecting mirror 108 and then emitted as parallel light toward the dichroic mirror 201.

The light beam 204 split and reflected from the dichroic mirror 201 is condensed and focused to the light diffusion block 111. The light diffusion module 111 at least comprises a light diffusion material unit, and the light diffusion material unit is provided with a scattering material and a structure capable of diffusing laser.

The second shaped reflector 112 is surrounded and disposed outside the light diffusion module 111, in this embodiment, the second shaped reflector 112 is a parabolic reflector having a focus, and the light diffusion material unit in the light diffusion module is disposed at or near the focus of the second shaped reflector. The converging light beam 204 is focused on the light diffusing material unit, then diffused by diffuse reflection, and diffused light 205 is generated, collected and reflected by the inner wall of the second irregularly-shaped reflecting mirror 112, and then emitted as parallel light toward the dichroic mirror 201.

In the present embodiment, the radiant fluorescence 203 is reflected by the dichroic mirror 108 and then output as parallel light, and is totally reflected after entering the dichroic mirror 201, and at this time, the optical axis of the first special-shaped reflective mirror 108 coincides with the optical axis of the laser condenser assembly 104. The optical axis of the first profiled reflector 108 coincides with the optical axis of the converging excitation beam 202. And the diffused light 205 is collected and reflected by the second special-shaped reflective mirror 112 and then exits as parallel light, and part of the parallel light exits through the dichroic mirror. The optical axis of the second special-shaped reflecting mirror 112 is perpendicular to the optical axis of the laser condenser group 104, and the optical axis of the second special-shaped reflecting mirror 112 is perpendicular to the optical axis of the converging light beam 204.

The radiation light reflected by the dichroic mirror is superposed and combined with the transmitted diffused light, and the mixed light is mixed to generate white light 206 to be emitted.

Example three:

as shown in fig. 3, a divergent laser beam emitted from a laser 101 is collected and collimated by a laser collimator 102 to output a collimated laser beam 103, the laser beam 103 is incident on a reflector 301, then an emergent light 302 is incident on a concave reflector 303 again, the incident direction of the emergent light 302 is parallel to the optical axis of the concave reflector 303, in this embodiment, 303 is a paraboloidal concave reflector, and the inner surface of 303 is coated with a reflective film.

The concave reflective mirror 303 has positive power, and the focal length thereof is determined by the distance between the concave reflective mirror 303 and the center of the dichroic mirror 105 and the distance between the dichroic mirror and the light wavelength conversion module 107 or the light diffusion module 111.

In this embodiment, the beam 302 is reflected and converged by a concave mirror 303 and, before being focused, is split into two paths by a dichroic mirror 105, one of which is reflected to give a converging beam 304 and the other of which is transmitted to give a transmitted beam 305.

The converging light beam 304 reflected by the light source 105 is focused on the optical wavelength conversion module 107. The optical wavelength conversion module 107 includes an optical wavelength conversion material unit, and the converging light beam 304 can be focused on the optical wavelength conversion material unit 107a, so that the optical wavelength conversion unit can absorb the laser energy emitted by the laser and emit the fluorescent light 109 with a wavelength within a range of 470nm to 720 nm.

The first shaped reflector 108 is surrounded at the periphery of the optical wavelength conversion module 107, and in this embodiment, the first shaped reflector 108 is a parabolic reflector. It has a focus, and the optical wavelength conversion material unit in the optical wavelength conversion module is disposed on the focus of the first special-shaped reflector 108 or near the focus.

When the fluorescence conversion material unit is excited by the incident laser 304, the emitted fluorescence 109 is reflected by the inner wall of the first irregularly-shaped reflecting mirror 108 and then emitted as parallel light toward the dichroic mirror 105.

The light beam 305 split and transmitted from the dichroic mirror 105 is condensed and focused to the light diffusion block 111. The light diffusion module 111 at least comprises a light diffusion material unit having a scattering material and a structure capable of diffusing the laser light.

The second shaped reflector 112 is surrounded at the periphery of the light diffusion module 111, in this embodiment, the second shaped reflector 112 is a parabolic reflector having a focus, and the light diffusion material unit in the light diffusion module is disposed at or near the focus of the second shaped reflector. The condensed light beam 305 is focused on the light diffusing material unit, diffused by diffuse reflection, and diffused light 113 is generated, collected and reflected by the inner wall of the second irregularly shaped reflecting mirror 112, and then emitted as parallel light toward the dichroic mirror 105.

In this embodiment, the radiant fluorescent light 109 after the optical wavelength conversion is reflected by the first special-shaped reflective mirror 108 and then output as parallel light, and can be completely transmitted out from the dichroic mirror 105, and at this time, the optical axis of the first special-shaped reflective mirror 108 is perpendicular to the optical axis of the concave reflective mirror 303. The optical axis of the first special-shaped reflective mirror 108 is not coincident with the optical axis of the converging light beam 304, that is, the converging light beam 304 is obliquely incident on the optical wavelength conversion module 107.

And the diffused light 113 for color combination is reflected by the second special-shaped reflecting mirror 112, and then exits as parallel light, and is partially reflected by the dichroic mirror. The optical axis of the second shaped reflector 112 coincides with the optical axis of the concave reflective mirror 303, while the optical axis of the second shaped reflector 112 does not coincide with the optical axis of the converging light beam 305, and the radiation light transmitted through the dichroic mirror coincides with the reflected diffused light and is mixed to generate white light 306 to be emitted.

Example four:

as shown in fig. 4, the condensed light beam emitted from the laser condenser group is divided into a reflected light beam and a transmitted light beam by the dichroic mirror 105, the reflected light beam deactivates the light wavelength conversion module 107, and the generated radiation light 109 is reflected by the inner wall of the first irregularly shaped reflecting mirror 108, passes through the dichroic mirror 105, and is output. The light beam transmitted from the dichroic mirror 105 is focused on the light diffusion module 111, and the generated diffused light 113 is reflected by the inner wall of the second irregularly-shaped reflecting mirror 112, becomes parallel light, is output, is partially reflected by the dichroic mirror 105, and then is superposed and combined with the radiation light 109, and white light 404 is output.

A first plane reflector and a second plane reflector are arranged on a light path between the collimating lens and the laser condenser group, laser emitted by the laser diode is collimated by the collimating lens and then parallelly incident to the first plane reflector, the laser is reflected by the first plane reflector and then incident to the second plane reflector, parallel light reflected by the second plane reflector passes through the laser condenser group to form a converged laser beam, and after the converged laser beam is acted by the dichroic mirror, one part of the converged laser beam is converged on the optical wavelength conversion module to excite radiation fluorescence, and the other part of the converged laser beam is converged on the optical diffusion module to form diffused light; wherein the first planar mirror rotates about one axial direction and the second planar mirror rotates about another axial direction perpendicular to the axial direction.

In the present embodiment, a pair of plane mirrors, i.e. a first mirror 401 and a second mirror 402, is disposed between the laser collimating mirror 102 and the laser condenser group 104. At the initial zero position, the first mirror 401 and the second mirror 402 are parallel to each other, and the angle between the normal of the second mirror 402 and the optical axis of the laser condenser group 104 is 45 °.

The divergent laser beam emitted by the laser 101 is collected and collimated by the laser collimating mirror 102, and outputs a collimated laser beam 103, the laser beam 103 enters the reflecting mirror 401 at an angle of 45 °, is reflected by the first reflecting mirror 401, enters the second reflecting mirror 402 at an angle of 45 °, is reflected again, and then enters the laser condenser group 104 in parallel to the optical axis of the laser condenser group 104.

403 is a coordinate system of the embodiment, the mirror 401 can rotate around the Y-axis within a rotation angle range of 0-45 °. The mirror 402 can rotate around the X-axis within a range of 0-45 degrees. The first mirror 401 and the second mirror 402 may be separately adjustably controlled.

When the adjustment mirror 401 is rotated about the Z axis, it is possible to cause a positional change of the laser beam focused on the optical wavelength conversion module 107 and the light diffusion module 111, thereby changing the position of the light emitting point irradiated by the irradiated light 109 and the position of the light scattering point by the diffused light 113, and finally changing the exit angle of the exit light beam 404 about the Z axis.

When the adjustment mirror 402 is rotated about the X axis, a positional change of the laser beam focused on the light wavelength conversion module 107 and the light diffusion module 111 can be caused, thereby changing the position of the light emitting point of the irradiation light 109 and the position of the light scattering point of the diffused light 113, and finally changing the exit angle of the exit beam 404 about the X axis.

Example five:

as shown in fig. 5, the device comprises more than two laser diodes arranged in any space and a matched collimating lens, wherein a plurality of parallel lights emitted by the laser diodes in a number corresponding to the laser diodes are incident on a laser condenser to form a plurality of convergent laser beams, and all the convergent laser beams are focused on an optical wavelength conversion module and an optical diffusion module respectively after being acted by a dichroic mirror.

In this embodiment, the laser 101 may include one or more laser diodes, which may be of the same wavelength or a combination of different wavelengths. The wavelength range of the light emitted by the laser diode is 400 nm-470 nm, and typical central wavelengths are as follows: 405nm, 423nm, 455nm, etc. The laser diodes may be independently controlled including switching, signal modulation, drive current increase or decrease. In this embodiment, the laser 101 is composed of a first laser diode 501a, a second laser diode 501b, and a third laser diode 501 c. The first collimating lens 502a, the second collimating lens 502b and the third collimating lens 502c follow the laser diode in sequence, and the collimating lens 102 collimates the laser light with a large divergence angle emitted by the laser diode and outputs the collimated laser light as parallel light.

The laser beam emitted from the collimating lens 102 may partially enter the reflecting mirror group first and then be reflected to enter the laser focusing mirror group, or partially directly enter the laser condensing mirror group, or may completely enter the reflecting mirror group and then be reflected to enter the condensing mirror group, or may completely directly enter the condensing mirror group.

The reflector group can be composed of 1 plane reflector or 2 mutually parallel reflectors, wherein one reflector can rotate around a certain axial direction, and the other reflector can rotate around the other axial direction which is vertical to the axial direction. In this embodiment, the mirror group 503 is composed of a plurality of independent mirrors, which are respectively a first mirror 503a, a second mirror 503b and a third mirror 503c, the mirrors are distributed in a specific arrangement, the independent mirrors can be independently controlled by rotation, in this embodiment, they can rotate around the X-axis or the Z-axis, and the rotation angle is 0-45 °.

The collimated laser beams incident to the laser condenser lens group can be all parallel or partially parallel, can be perpendicularly and normally incident to the condenser lens group (i.e. the incident direction is parallel to the central optical axis of the condenser lens group), and can also be incident to the condenser lens group at a certain angle. In this embodiment, the collimated laser beams reflected from the first mirror 503a, the second mirror 503b and the third mirror 503c are normally incident on the condenser lens group 104 at a certain interval from each other.

In this embodiment, the condensed light beam emitted from the laser condenser group 104 has three beams, which are divided into a reflected light beam and a transmitted light beam by the dichroic mirror 105, the reflected light beam is converged to a single point, the light wavelength conversion module 107 is deactivated, and the light 109 generated by the radiation is reflected by the inner wall of the first special-shaped reflective mirror 108, becomes parallel light, and is transmitted from the dichroic mirror 105 and is output. The light beams transmitted from the light source 105 are all focused on the light diffusion module 111, the generated diffused light 113 is reflected by the inner wall of the second special-shaped reflector 112 to become parallel light, and the parallel light is output, is partially reflected by the light source 105, is superposed with the radiation light 109 and is combined, and white light 505 is output.

The invention has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the invention.

Claims

1. Laser light emitting source device, its characterized in that: comprises at least one laser diode and a collimating lens matched with the laser diode, a laser condenser group, a light wavelength conversion module, a light diffusion module, a dichroic mirror, a first special-shaped reflector and a second special-shaped reflector,

the optical wavelength conversion module is positioned at the focus of the first special-shaped reflector, the optical diffusion module is positioned at the focus of the second special-shaped reflector, the optical axes of the first special-shaped reflector and the second special-shaped reflector are vertical to each other,

laser emitted by the laser diode is collimated by the collimating lens and then parallelly enters the laser condenser group to form a converged laser beam, a part of the converged laser beam under the action of the dichroic mirror is converged on the optical wavelength conversion module to excite fluorescence with the radiation wavelength within the range of 470-720 nm, and the fluorescence is reflected by the first special-shaped reflector and is emitted towards the dichroic mirror as parallel light; the other part of the light is converged on the light diffusion module to form diffused light, the diffused light is reflected by the second special-shaped reflector, is emitted towards the dichroic mirror as parallel light, and is combined by the dichroic mirror to form mixed parallel light for output.

2. The laser light source device according to claim 1, wherein: the positions of the optical wavelength conversion module and the optical diffusion module can be interchanged.

3. The laser light source device according to claim 1, wherein: the laser emitted by the laser diode is collimated by the collimating lens and then enters the plane reflecting mirror in parallel, and then enters the concave reflecting mirror after being reflected by the plane reflecting mirror, and then is reflected by the concave reflecting mirror to form a converged laser beam, one part of the converged laser beam is converged on the optical wavelength conversion module to excite radiation fluorescence after being acted by the dichroic mirror, and the other part of the converged laser beam is converged on the optical diffusion module to form diffused light.

4. The laser light source device according to claim 1, wherein: a first plane reflector and a second plane reflector are arranged on a light path between the collimating lens and the laser condenser group, laser emitted by the laser diode is collimated by the collimating lens and then parallelly incident to the first plane reflector, the laser is reflected by the first plane reflector and then incident to the second plane reflector, parallel light reflected by the second plane reflector passes through the laser condenser group to form a converged laser beam, and after the converged laser beam is acted by the dichroic mirror, one part of the converged laser beam is converged on the optical wavelength conversion module to excite radiation fluorescence, and the other part of the converged laser beam is converged on the optical diffusion module to form diffused light; wherein the first planar mirror rotates about one axial direction and the second planar mirror rotates about another axial direction perpendicular to the axial direction.

5. The laser light source device according to claim 1, wherein: the laser light source comprises more than two laser diodes which are randomly arranged in space and matched collimating lenses, wherein multiple strands of parallel light emitted corresponding to the number of the laser diodes are incident to a laser condenser lens to form multiple strands of converged laser beams, and all the converged laser beams are focused on an optical wavelength conversion module and an optical diffusion module respectively after being acted by a dichroic mirror.

6. The laser light source device according to claim 5, wherein: all the laser diodes have the same wavelength or a combination of different wavelengths, and the wavelength range of light emitted by the laser diodes is 280-470 nm; the individual laser diodes involved are controlled independently, including switching, signal modulation, drive current increase or decrease.

7. The laser light source device according to claim 1, wherein: the laser condenser group is composed of a single lens, or a combination of a plurality of lenses, or an aspheric lens, or a combination of a spherical lens and an aspheric lens, or a combination of all positive lenses, or a combination of a positive lens and a negative lens, or a concave surface reflection condenser; the focal length of the laser condenser set is determined according to the central distance between the laser condenser set and the dichroic mirror and the distance between the dichroic mirror and the optical wavelength conversion module or the optical diffusion module.

8. The laser light source device according to claim 1, wherein: the dichroic mirror is a parallel flat plate or a cube prism comprising a 45-degree light splitting surface, the optical axis of the dichroic mirror forms a 45-degree included angle relative to the central optical axis of the condenser lens group, the parallel flat plate comprises a first surface and a second surface, and at least one surface can split incident laser to reflect one part and transmit the other part.

9. The laser light source device according to claim 1, wherein: the optical wavelength conversion module at least comprises an optical wavelength conversion material unit and a material fixing and radiating module, and a first special-shaped reflector is arranged on the outer side of the optical wavelength conversion module in a surrounding manner; the first special-shaped reflector is a parabolic reflector with a reflecting film plated on the inner surface or a combined reflector; the wavelength conversion material unit is arranged at the focus of the first special-shaped reflector, and the fluorescence of the excited radiation is reflected and emitted out towards the dichroic mirror as parallel light.

10. The laser light source device according to claim 1, wherein: the light diffusion module at least comprises a light diffusion material unit and a diffusion material fixing and radiating module, and a second special-shaped reflector is arranged on the outer side of the light diffusion module in a surrounding mode; the second special-shaped reflector is a parabolic reflector with a reflecting film plated on the inner surface or a combined reflector; the light diffusion material unit is arranged at the focus of the second special-shaped reflector, and the diffused light is reflected and emitted out towards the dichroic mirror as parallel light.