CN112628616A - Mixed light-emitting device - Google Patents

Mixed light-emitting device Download PDF

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Publication number
CN112628616A
CN112628616A CN202110047418.8A CN202110047418A CN112628616A CN 112628616 A CN112628616 A CN 112628616A CN 202110047418 A CN202110047418 A CN 202110047418A CN 112628616 A CN112628616 A CN 112628616A
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light
laser
emitted
wavelength conversion
lens
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CN202110047418.8A
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Chinese (zh)
Inventor
程波涛
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Suzhou Shiao Optoelectronic Technology Co ltd
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Suzhou Shiao Optoelectronic Technology Co ltd
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Priority to CN202110047418.8A priority Critical patent/CN112628616A/en
Publication of CN112628616A publication Critical patent/CN112628616A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68—Details of reflectors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
    • F21V9/35—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material at focal points, e.g. of refractors, lenses, reflectors or arrays of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention discloses a mixed light-emitting device which comprises a first laser, a dichroic mirror, a light wavelength conversion module, a combined light generation unit and a light emitting collimating mirror. The technical scheme does not need to open a hole on the ellipsoidal reflector, and can also lead the laser beam to be incident and focused on the focal point of the reflector, thereby simplifying the manufacturing process of the reflector and not reducing the reflective area and the light effect.

Description

Mixed light-emitting device
Technical Field
The invention relates to a mixed light-emitting device which can be used in the technical field of laser light-emitting sources.
Background
In recent years, an LED light source is replacing a traditional incandescent lamp and an energy-saving lamp to become a new type of illumination light source, and as a general illumination light source, the LED light source has the advantages of high efficiency, energy saving, environmental protection, long service life and the like, but the electro-optical efficiency of the LED limits the self-luminous brightness thereof to be limited. 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.
The above technology produces white light by mixing blue light and yellow light, and the color temperature of the mixed white light will be different due to the change of the ratio of the blue light to the yellow light. In the prior art, the proportion of blue light and yellow light is determined, so the color temperature of white light is also certain and cannot be adjusted. In addition, some current static illumination light source schemes collect yellow and white light emitted by fluorescent radiation by using a plurality of lenses, because the lenses and the fluorescent materials are arranged in parallel, the lenses have caliber limitation in practical installation, and the reflected light of the fluorescent materials presents lambertian divergence of 180 degrees, so the collection efficiency of the radiated fluorescence is limited by the influence of the numerical aperture of the lenses.
Disclosure of Invention
The present invention is directed to a hybrid light emitting device that solves the above problems of the prior art.
The purpose of the invention is realized by the following technical scheme: a mixed light-emitting device comprises a first laser, a first laser collimating mirror, a first laser condensing lens group, a dichroic mirror, a light wavelength conversion module, an ellipsoidal reflector, a combined light generating unit, a second focusing lens group and a light emergent collimating mirror.
Preferably, an ellipsoidal reflector is arranged on the periphery of the optical wavelength conversion module, the optical wavelength conversion module is arranged at a first focus of the ellipsoidal reflector and a position near the first focus, a second focus of the ellipsoidal reflector coincides with an object focus of the light emergent collimating mirror, fluorescent light emitted by the optical wavelength conversion module is reflected by the inner wall of the ellipsoidal reflector and then converged to the second focus of the ellipsoidal reflector, and the light emergent collimating mirror is collimated and then emitted in parallel; the inner surface of the ellipsoidal reflector is plated with a reflecting film, and the reflecting film is a metal silver film or a dielectric film.
Preferably, a second focusing mirror group is arranged between the combined light generating unit and the dichroic mirror, and diffused light emitted by the combined light generating unit is converged to an object focus of the light exit collimating mirror through the second focusing mirror group and is collimated by the light exit collimating mirror and then is emitted in parallel.
Preferably, the dichroic mirror is a parallel flat plate or a cubic prism with a 45-degree light splitting surface, and an included angle of 45 degrees is formed between the optical axis of the dichroic mirror and the central optical axes of the first laser collimating mirror and the first laser collecting mirror.
Preferably, the dichroic mirror is completely transmissive to the light beam emitted from the first laser, completely reflective to the fluorescence emitted from the light wavelength conversion module, and partially transmissive or completely transmissive to the diffused light emitted from the combined light generating unit.
Preferably, the dichroic mirror is totally reflected to the light beam emitted from the first laser, totally transmits the fluorescence emitted from the optical wavelength conversion module, and partially reflects or totally reflects the diffused light emitted from the combined light generating unit.
Preferably, the first laser condenser group is 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 reflective condenser; the first laser adopts a laser diode, and the wavelength range of the emitted central light is 280-470 nm.
Preferably, the optical wavelength conversion module comprises an optical wavelength conversion material unit and a material fixing and heat dissipation module, the optical wavelength conversion material unit is made of fluorescent ceramic, and the luminescent material can absorb laser energy emitted by the first laser and radiate fluorescence with a wavelength within a range of 470 nm-720 nm.
Preferably, the combined light generating unit includes a second laser, a second laser collimator, a second focusing lens set, and a transmissive light diffuser, the transmissive light diffuser is located at or near a focal point of the second focusing lens set, and laser light emitted by the second laser is collimated by the second laser collimator, enters the second focusing lens set, is converged to the light diffuser, and passes through the light diffuser to generate diffused light for color combination; the transmission type light diffusion sheet is a surface scattering sheet, a volume scattering sheet or a DOE diffraction optical element; the second laser can emit laser with the wavelength within the range of 400 nm-470 nm.
The technical scheme of the invention has the advantages that:
1. the technical scheme can independently separate the excitation source of fluorescence and the generation source of diffused light, and is convenient for independent regulation and control.
2. The technical scheme does not need to open a hole on the ellipsoidal reflector, and can also lead the laser beam to be incident and focused on the focal point of the reflector, thereby simplifying the manufacturing process of the reflector and not reducing the reflective area and the light effect.
3. 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.
Drawings
Fig. 1 is a schematic structural diagram of a hybrid light emitting device according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of a hybrid light emitting device according to the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of a hybrid light emitting device according to the present invention.
Fig. 4 is a schematic structural diagram of a fourth embodiment of a hybrid light emitting device according to 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 present invention discloses a hybrid light emitting device, as shown in fig. 1, the hybrid light emitting device includes a first laser 101, a dichroic mirror, a light wavelength conversion module 106, a combined light generating unit 109, a light exit collimating mirror 112, an ellipsoidal reflective mirror, and a second focusing mirror group. The laser emitted by the first laser 101 enters the wavelength conversion module 106 and is excited to generate fluorescence, and the fluorescence and the light emitted by the combined light generation unit 109 are combined by the dichroic mirror and then collimated by the light emitting collimator 112 to form mixed parallel light for output.
A dichroic mirror is arranged on a light path of the first laser 101, a first laser collimating lens 102 and a first laser condenser group 104 are arranged between the first laser 101 and the dichroic mirror, a laser beam emitted by the first laser 101 is collimated by the first laser collimating lens 102 to obtain parallel light 103, the parallel light 103 enters the first laser condenser group 104 to form convergent light, and the convergent light is converged to the optical wavelength conversion module 106 through the dichroic mirror.
The first laser is usually a laser diode, and the central light wavelength emitted by the first laser is in the range of 280 nm-470 nm. The laser diodes may be independently controlled including switching, signal modulation, drive current increase or decrease.
The light beam emitted by the first laser is collimated by the first laser collimating lens and then enters the first laser condenser group, and the first laser condenser group is positioned between the first laser and the dichroic mirror. The laser condenser lens group has positive focal power, and can be 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 a positive lens and a negative lens, or a concave surface reflection condenser lens.
The dichroic mirror is a parallel flat plate or a cubic prism with a 45-degree light splitting surface, and the optical axis of the dichroic mirror forms a 45-degree included angle with the central optical axes of the first laser collimating mirror and the first laser collecting mirror.
The optical wavelength conversion module 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. Laser beams emitted by the first laser device can be focused on the optical wavelength conversion material unit after being converged by the condenser group, so that the optical wavelength conversion material unit can absorb laser energy emitted by the laser device and radiate fluorescence with the wavelength within the range of 470-720 nm.
An ellipsoidal reflector is arranged at the periphery of the optical wavelength conversion module, and a reflective film, such as a metal silver film or a dielectric film, is plated on the inner surface of the ellipsoidal reflector. The ellipsoidal reflector has a first focus and a second focus, wherein the first focus is close to the bottom end of the ellipsoidal reflector (opposite to the light outlet of the ellipsoidal reflector). The optical wavelength conversion material unit is arranged on the first focus of the ellipsoidal reflector or near the first focus. When the optical wavelength conversion material unit is excited by the incident laser, the emitted fluorescence is converged to the second focus of the ellipsoidal reflector after being reflected by the inner wall of the ellipsoidal reflector.
The light emergent collimating lens is positioned between the light outlet of the system and the dichroic mirror, has positive focal power and can be composed of one or more lenses, and the object focus of the light emergent collimating lens is superposed with the second focus of the ellipsoidal reflector, so that the fluorescent light can be parallelly emergent after being collected by the light emergent collimating lens.
The combined light generating unit can emit diffused light within the range of 400 nm-470 nm, the diffused light is collected and converged to an image point by the second focusing lens group, and the image point is superposed with an object focus of the light emergent collimating lens, so that the diffused light can be collected by the light emergent collimating lens and then combined with fluorescence to generate parallel white light for emergence.
Dichroic mirrors can have two designs:
the first scheme of the dichroic mirror is: the dichroic mirror is completely transmitted to the light beam emitted by the first laser, completely reflects the fluorescent light emitted by the light wavelength conversion module, and partially transmits or completely transmits the diffused light emitted by the combined light generating unit.
The second scheme of the dichroic mirror is as follows: the dichroic mirror totally reflects the light beam emitted by the first laser, totally transmits the fluorescent light emitted by the light wavelength conversion module, and partially or totally reflects the diffused light emitted by the combined light generating unit.
The combined light generating unit can emit light by an LED chip or a transmission type light diffusion sheet. When the combined light generating unit emits light by adopting the transmission type light diffusion sheet, the combined light generating unit comprises a second laser, a second laser collimating mirror, a second focusing mirror group and the transmission type light diffusion sheet. The laser emitted by the second laser is collimated by the second laser collimating lens and then enters the second focusing lens group, the transmission type light diffusion sheet is positioned at or near the focus of the laser focusing lens, the laser beam is focused on the light diffusion sheet and penetrates through the light diffusion sheet to generate diffused light for color combination, and the diffused light is equivalent to a point light source to emit light. The transmissive light diffusing sheet may be a surface diffusing sheet, a volume diffusing sheet, a DOE diffractive optical element, or the like.
The combined light generating unit, whether an LED or the second laser, can be controlled independently, including switching, signal modulation, drive current increase or decrease.
The first embodiment is as follows:
as shown in fig. 1, the first laser 101 is typically a laser diode, and the central light emitted by the first laser has a wavelength in the range of 400nm to 470nm, for example: 455nm, 423nm, etc. The laser diodes may be independently controlled including switching, signal modulation, drive current increase or decrease.
The light beam emitted by the first laser 101 is collimated by the first laser collimating lens 102, and then the obtained parallel light 103 is incident on the first laser condenser group 104. And a first laser condenser group 104 located between the first laser 101 and the dichroic mirror 105. The laser condenser lens group has positive focal power, and can be 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 a positive lens and a negative lens, or a concave surface reflection condenser lens.
In the technical scheme, the dichroic mirror is a parallel flat plate or a cubic prism with a 45-degree light splitting surface, and an included angle of 45 degrees is formed between the optical axis of the dichroic mirror and the central optical axes of the first laser collimating mirror and the first laser collecting mirror.
The optical wavelength conversion module 106 includes an optical wavelength conversion material unit 106a, which may be a fluorescent ceramic or other luminescent material, and a material fixing and heat dissipating module 106 b. After being converged by the condenser group, the laser beam emitted by the first laser 101 can be focused on the optical wavelength conversion material unit 106a, so that the optical wavelength conversion unit can absorb the laser energy emitted by the laser and emit fluorescence 108, and the wavelength of the fluorescence 108 is within the range of 470nm to 720 nm.
The periphery of the optical wavelength conversion module is surrounded by an ellipsoidal reflector 107, and the inner surface of the ellipsoidal reflector is coated with a reflective film, such as a silver metal film or a dielectric film. The ellipsoidal reflector has a first focus and a second focus, wherein the first focus is close to the bottom end of the ellipsoidal reflector and is opposite to the light outlet of the ellipsoidal reflector. The optical wavelength conversion material unit 106a in the optical wavelength conversion module is disposed on the first focus of the ellipsoidal reflector 107 or near the first focus. When the optical wavelength conversion material unit is excited by the incident laser, the emitted fluorescent light 108 is reflected by the inner wall of the first ellipsoidal reflector and then converged to the second focus of the ellipsoidal reflector.
A light exit collimator 112 is located between the light exit of the system and the dichroic mirror 105, the light exit collimator 112 having a positive optical power and may be composed of one or more lenses. In this embodiment, the central optical axis of the light exit collimator 112 is perpendicular to the optical axis of the ellipsoidal mirror 107. The object space focus of the light emergent collimating mirror is coincided with the second focus of the ellipsoidal reflector, so that the fluorescent light can be collected by the light emergent collimating mirror and then emitted in parallel.
The combined light generating unit 109 can emit diffused light 110 within a range of 400nm to 470nm, the diffused light is collected and converged to an image point by the second focusing lens group 111, and the image point coincides with an object focus of the light exit collimating lens 112, so that the diffused light 110 can be collected by the light exit collimating lens 112 and then combined with fluorescence to generate parallel white light 113 for exit. In this embodiment, the central optical axis of the light exit collimator 112 coincides with the optical axis of the second focusing lens group 111.
In the present embodiment, the combined light generating unit 109 includes a second laser 109a, a second laser collimating mirror 109b, a laser focusing mirror 109c, and a transmissive light diffusing sheet 109 d. The laser beam emitted from the second laser 109a is collimated by the second laser collimating mirror 109b and enters the laser focusing mirror 109c, the transmissive light diffusing sheet 109d is positioned at or near the focal point of the laser focusing mirror 109c, and the laser beam is focused on the light diffusing sheet, then passes through the light diffusing sheet 109d and is diffused, thereby generating diffused light 110 for color combination. The transmissive light diffusing sheet may be a surface diffusing sheet, a volume diffusing sheet, a DOE diffractive optical element, or the like. The second laser 109a can be independently controlled including switching, signal modulation, drive current increase or decrease.
In the present embodiment, the dichroic mirror 105 completely transmits the light beam emitted from the first laser 101, and completely reflects the fluorescent light 108 emitted from the light wavelength conversion module 106, and at the same time, partially transmits or completely transmits the diffused light 110 emitted from the combined light generating unit 109, depending on the wavelength of the combined light generating unit 109 and the coating design of the dichroic mirror 105.
Example two:
fig. 2 is a schematic structural diagram of a second embodiment of the present technical solution. In this embodiment, the dichroic mirror 201 totally reflects the light beam emitted from the first laser 101, totally transmits the fluorescence 108 emitted from the optical wavelength conversion module 106, and partially reflects or totally reflects the diffused light 110 emitted from the combined light generating unit 109, depending on the wavelength of 109 and the coating design of the dichroic mirror 201.
The combined light generating unit 109 collects and converges the emitted diffused light by the second focusing lens group 111 to an image point, and the image point coincides with the object focus of the light exit collimator 112, so that the diffused light 110 can be collected by the light exit collimator 112 and then combined with the fluorescence to generate parallel white light 113 for exit. In this embodiment, the central optical axis of the light exiting collimator 112 is perpendicular to the optical axis of the second focusing lens group 111.
In this embodiment, the central optical axis of the light exit collimator 112 coincides with the optical axis of the ellipsoidal mirror 107. The object focus of the light exit collimator 112 coincides with the second focus of the ellipsoidal reflector, so that the fluorescent light can be collected by the light exit collimator and then emitted in parallel.
Example three:
fig. 3 is a schematic structural diagram of a third embodiment of the present technical solution. In the embodiment, the combined light generating unit emits light by the LED chip, the central wavelength of the emission of the LED is within the range of 400nm to 470nm, and the divergence angle of the emission is within the range of 0 to 120 degrees. The LED chip is surface-emitting, direct current drive is adopted, and the magnitude of a modulation signal and the magnitude of drive current are controllable and adjustable.
The LED chip 302 emits diffused light 303, which is collected and converged to an image point by the second focusing lens group 111, and the image point coincides with the object focus of the light exit collimator 112, so that the diffused light 303 can be collected by the light exit collimator 112 and then combined with fluorescence to generate parallel white light 113 for exit. In this embodiment, the central optical axis of the light exit collimator 112 coincides with the optical axis of the second focusing lens group 111.
In this embodiment, the central optical axis of the light exit collimator 112 is perpendicular to the optical axis of the ellipsoidal mirror 107. The object focus of the light exit collimator 112 coincides with the second focus of the ellipsoidal reflector, so that the fluorescent light can be collected by the light exit collimator and then emitted in parallel.
In this embodiment, the dichroic mirror 301 completely transmits the light beam emitted from the first laser 101, and completely reflects the fluorescent light 108 emitted from the light wavelength conversion module 106, and at the same time, partially reflects or completely reflects the diffused light 330 emitted from the LED chip 302, depending on the emission wavelength of the LED chip 302 and the coating design of the dichroic mirror 301.
Example four:
fig. 4 is a schematic structural diagram of a fourth embodiment of the present disclosure. Similar to the third embodiment, in the present embodiment, the combined light generating unit emits light by the LED chip, the central wavelength of the LED emission is in the range of 400nm to 470nm, and the divergence angle of the light emission is in the range of 0 to 120 °. The LED chip is surface-emitting, direct current drive is adopted, and the magnitude of a modulation signal and the magnitude of drive current are controllable and adjustable.
The LED chip 302 emits diffused light, which is collected and converged to an image point by the second focusing lens group 111, and the image point coincides with the object focus of the light exit collimator 112, so that the diffused light can be collected by the light exit collimator 112 and then combined with fluorescence to generate parallel white light 113 for exit. In this embodiment, the central optical axis of the light exiting collimator 112 is perpendicular to the optical axis of the second focusing lens group 111.
In this embodiment, the central optical axis of the light exit collimator 112 coincides with the optical axis of the ellipsoidal mirror 107. The object focus of the light exit collimator 112 coincides with the second focus of the ellipsoidal reflector, so that the fluorescent light can be collected by the light exit collimator and then emitted in parallel.
In the present embodiment, the dichroic mirror 401 totally reflects the light beam emitted from the first laser 101, totally transmits the fluorescence 108 emitted from the optical wavelength conversion module 106, and partially or totally reflects the diffused light emitted from the LED chip 302. Depending on the emission wavelength of the LED chip 302 and the coating design of the dichroic mirror 401.
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 (9)

1. A hybrid light emitting device, characterized in that: the laser beam emitted by the first laser is collimated by the first laser collimating lens, the obtained parallel light enters the first laser condensing lens group to obtain convergent light, the convergent light is transmitted through the dichroic mirror and converged to the optical wavelength conversion module and excites and radiates fluorescence, and the fluorescence and the light emitted by the combined light generating unit are reflected or transmitted through the dichroic mirror and are incident to the light emergent collimating lens to form mixed parallel light for output after being collimated.
2. A hybrid lighting device as recited in claim 1, wherein: an ellipsoid reflector is arranged at the periphery of the optical wavelength conversion module, the optical wavelength conversion module is arranged at a first focus of the ellipsoid reflector and the vicinity of the first focus, a second focus of the ellipsoid reflector is overlapped with an object focus of the light emergent collimating mirror, fluorescent light emitted by the optical wavelength conversion module is reflected by the inner wall of the ellipsoid reflector and then converged to the second focus of the ellipsoid reflector, and the light emergent collimating mirror is collimated and then emitted in parallel; the inner surface of the ellipsoidal reflector is plated with a reflecting film, and the reflecting film is a metal silver film or a dielectric film.
3. A hybrid lighting device as recited in claim 1, wherein: and a second focusing lens group is arranged between the combined light generating unit and the dichroic mirror, and diffused light emitted by the combined light generating unit is converged to an object focus of the light emergent collimating lens through the second focusing lens group and is collimated by the light emergent collimating lens and then is emitted in parallel.
4. A hybrid lighting device as recited in claim 1, wherein: the dichroic mirror is a parallel flat plate or a cubic prism with a 45-degree light splitting surface, and the optical axis of the dichroic mirror forms a 45-degree included angle with the central optical axes of the first laser collimating mirror and the first laser collecting mirror.
5. A hybrid lighting device as recited in claim 1, wherein: the dichroic mirror is completely transmitted to the light beam emitted by the first laser, completely reflects the fluorescent light emitted by the light wavelength conversion module, and partially transmits or completely transmits diffused light emitted by the combined light generating unit.
6. A hybrid lighting device as recited in claim 1, wherein: the dichroic mirror is used for completely reflecting the light beams emitted by the first laser, completely transmitting the fluorescent light emitted by the light wavelength conversion module, and partially reflecting or completely reflecting the diffused light emitted by the combined light generating unit.
7. A hybrid lighting device as recited in claim 1, wherein: the first laser condenser group is 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 first laser adopts a laser diode, and the wavelength range of the emitted central light is 280-470 nm.
8. A hybrid lighting device as recited in claim 1, wherein: the optical wavelength conversion module comprises an optical wavelength conversion material unit and a material fixing and heat dissipation module, wherein the optical wavelength conversion material unit is made of fluorescent ceramic, and a luminescent material can absorb laser energy emitted by the first laser and radiate fluorescence with the wavelength within the range of 470-720 nm.
9. A hybrid lighting device as recited in claim 1, wherein: the combined light generating unit comprises a second laser, a second laser collimating lens, a second focusing lens group and a transmission type light diffusion sheet, wherein the transmission type light diffusion sheet is positioned at or near the focus of the second focusing lens group, laser emitted by the second laser is collimated by the second laser collimating lens, then enters the second focusing lens group, is converged to the light diffusion sheet and penetrates through the light diffusion sheet, and diffused light for color combination is generated; the transmission type light diffusion sheet is a surface scattering sheet, a volume scattering sheet or a DOE diffraction optical element; the second laser can emit laser with the wavelength within the range of 400 nm-470 nm.
CN202110047418.8A 2021-01-14 2021-01-14 Mixed light-emitting device Withdrawn CN112628616A (en)

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CN202110047418.8A CN112628616A (en) 2021-01-14 2021-01-14 Mixed light-emitting device

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CN202110047418.8A CN112628616A (en) 2021-01-14 2021-01-14 Mixed light-emitting device

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CN112628616A true CN112628616A (en) 2021-04-09

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Application publication date: 20210409