CN217816547U

CN217816547U - Fluorescent optical module

Info

Publication number: CN217816547U
Application number: CN202221468611.5U
Authority: CN
Inventors: 陈怡学; 聂思永; 尹蕾
Original assignee: Yibin Jimi Photoelectric Co Ltd
Current assignee: Yibin Jimi Photoelectric Co Ltd
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-11-15
Anticipated expiration: 2032-06-13

Abstract

The utility model discloses a fluorescence optical module relates to fluorescence lighting technology field, the utility model discloses a fluorescence optical module, including the light source to and set up in the wavelength conversion structure of light source light-emitting direction, wavelength conversion structure is including the filter element, fluorescent layer and the dichroic element of range upon range of setting, and the light beam incidence fluorescent layer of light source outgoing excites the fluorescent material of fluorescent layer and forms the exciting light, and the exciting light that shines to the dichroic element is through filter element transmission back outgoing after the dichroic element reflects. The utility model provides a fluorescence optical module can improve fluorescence optical module's light-emitting efficiency.

Description

Fluorescent optical module

Technical Field

The application relates to the technical field of fluorescent lighting, in particular to a fluorescent optical module.

Background

Compared with the traditional light source, the semiconductor light source has the advantages of small volume, long service life, high luminous efficiency and the like, and is widely applied to various illumination fields in life. Whether indoors or outdoors it is primarily intended to provide white light for lighting purposes. Most of the current white Light semiconductor Light sources use Light emitted from a Light Emitting Diode (LED) or a Laser Diode (LD) to excite a fluorescent substance to emit excitation Light, and for example, a blue LED is combined with a yellow fluorescent substance to emit white Light.

In the prior art, fluorescent materials are scattered in all directions after being excited by an excitation light source, but the light emitting angle is limited under a common condition, so that light beams which are not in the light emitting angle cannot be collected, light beam leakage is caused, and the fluorescence light emitting efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a fluorescence optical module, can improve fluorescence optical module's light-emitting efficiency.

The embodiment of the application provides a fluorescence optical module, including the light source to and set up in the wavelength conversion structure of light source light-emitting direction, wavelength conversion structure is including the optical filter element, fluorescent layer and the dichroic element that range upon range of setting, and the light beam incidence fluorescent layer of light source outgoing and the fluorescent material of excitation fluorescent layer form the exciting light, and the exciting light that shines to the dichroic element is emergent after dichroic element reflects by the transmission of optical filter element after.

As an implementation manner, the light source includes a first light source disposed on the side of the filter element and a second light source disposed on the side of the dichroic element, a light beam emitted from the first light source passes through the filter element and enters the fluorescent layer, a light beam emitted from the second light source passes through the dichroic element and enters the fluorescent layer, and a dichroic mirror is disposed between the first light source and the filter element.

As a practicable manner, the dichroic element includes a dichroic film formed on the surface of the fluorescent layer, or the dichroic element includes a substrate and a dichroic film formed on the surface of the substrate.

As an implementation manner, the wavelength conversion structure further includes a heat conduction frame, and the filter element, the fluorescent layer, and the dichroic element are disposed in an area enclosed by the heat conduction frame.

As an implementation manner, a blocking ring is further disposed between the heat conducting frame and the fluorescent layer, and is used for reflecting the excitation light irradiated to the blocking ring and blocking external stray light.

As an implementation manner, the blocking ring is a white glue ring or a metal ring, and the side surface of the metal ring close to the fluorescent layer is a light reflecting surface.

As an implementation manner, a collimating lens group is further disposed between the dichroic mirror and the wavelength conversion structure.

As an implementation manner, the collimating lens group includes a biconvex lens and a plano-convex lens arranged along the light emitting direction of the first light source, and the plane of the plano-convex lens faces the wavelength conversion structure.

As an implementable mode, the filter element, the dichroic element and the fluorescent layer adopt SiC and Al ₂ O ₃ SiN, alN and diamond.

As a practical way, the light source emits light directly into the wavelength conversion structure, and the light source includes an LED light source or an LD light source.

The beneficial effects of the embodiment of the application include:

the utility model provides a fluorescence optical module, including the light source, and set up in the wavelength conversion structure of light source light-emitting direction, wavelength conversion structure is including the filter element of range upon range of setting, fluorescent layer and dichroic element, the light beam incident fluorescent layer that the light source sent and the fluorescent material of excitation fluorescent layer form the exciting light, the exciting light is to a plurality of direction scattering, the exciting light that shines to filter element sees through the filter element outgoing, the exciting light that shines to dichroic element is through the filter element after the dichroic element reflects transmission outgoing, wherein, the exciting light that dichroic element and filter element cooperation can collect two directions makes more exciting lights collected, thereby improve the luminous efficiency of fluorescence.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic diagram of a fluorescent optical module according to an embodiment of the present disclosure;

fig. 2 is a second schematic structural diagram of a fluorescence optical module according to an embodiment of the present disclosure.

An icon: 100-a fluorescent optical module; 110-a first light source; 120-dichroic mirror; 130-wavelength converting structure; 131-a fluorescent layer; 132-a dichroic element; 133-a filter element; 134-a thermally conductive frame; 135-a blocking ring; 136-white glue ring; 140-a second light source; 150-a collimating lens group; 151-lenticular lens; 152-plano-convex lens.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, detachable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The utility model provides a fluorescence optical module 100, as shown in FIG. 1, including the light source to and set up in the wavelength conversion structure 130 of light source light-emitting direction, wavelength conversion structure 130 is including the filter element 133, fluorescent layer 131 and the dichroic element 132 of range upon range of setting, and the light beam incidence fluorescent layer 131 of light source outgoing excites fluorescent layer 131's fluorescent material and forms the exciting light, and the exciting light that shines to dichroic element 132 is through filter element 133 transmission back outgoing after dichroic element 132 reflects.

After the light beam emitted from the light source irradiates the fluorescent material of the fluorescent layer 131, the fluorescent material in the ground state absorbs the light energy and is excited into an excited state, the excited state is unstable, the fluorescent material releases the energy quickly and returns to the ground state again, the energy is released in the form of light to form an excitation light, the wavelength of the excitation light is different from that of the light beam emitted from the light source, and the excitation light is visible light under normal conditions, so that the function of illumination can be realized.

The dichroic element 132 has dichroism, and particularly, the dichroic element 132 is characterized by transmitting light with certain wavelengths and reflecting light with other wavelengths, and for the dichroic element 132 in the present application, the light beam emitted from the light source can be transmitted, and for the excitation light with longer wavelengths, the light beam can be reflected. The filter element 133, which is characterized by the same dichroic element 132, transmits light of a certain wavelength and reflects light of other wavelengths, allows the filter element 133 of the present application to transmit excitation light of a longer wavelength and light emitted from the light source and to reflect light of a wavelength within a certain range. Note that the filter element 133 and the dichroic element 132 do not change the wavelength of the light beam when transmitting and reflecting the light beam.

As shown in fig. 1, when a light source emission light beam propagates to the wavelength conversion structure 130, the light source emission light beam passes through the filter element 133 or the dichroic element 132 and enters the fluorescent layer 131, the fluorescent material in the fluorescent layer 131 is excited by the light source emission light beam to form excitation light, the wavelength of the excitation light is different from that of the light source, the excitation light is scattered in various directions, the excitation light irradiated to the dichroic element 132 satisfies the wavelength of the light beam reflected by the dichroic element 132, so that the excitation light irradiated to the dichroic element 132 is reflected and propagates to the surface of the filter element 133, the excitation light reflected by the dichroic element 132 is transmitted by the filter element 133 and exits because the wavelength of the excitation light satisfies the wavelength transmitted by the filter element 133, and the excitation light irradiated to the filter element 133 is transmitted by the filter element 133 and exits, and the filter element 133 and the dichroic element 132 cooperate to collect the excitation light in two directions, thereby improving the collection efficiency of the excitation light and improving the light extraction efficiency of the fluorescence optical module 100.

The specific form of the filter element 133 is not limited in the embodiment of the present application, and those skilled in the art can set the filter element according to actual conditions, for example, the filter element may be an ultraviolet filter, the ultraviolet filter can reflect ultraviolet light and transmit light with a longer wavelength, and the reflected ultraviolet light enters the fluorescent layer 131 to be continuously excited to form excitation light, so as to improve the light emitting efficiency of the fluorescence optical module 100, and on the other hand, when the emergent light of the fluorescence optical module 100 is used for illumination, the emergent light of the ultraviolet light can be prevented from entering human eyes after being emitted, so that the human eyes are prevented from being injured.

It should be noted that, as to the specific form of the light source, the embodiment of the present application is not limited as long as the fluorescent material of the fluorescent layer 131 can be excited to form excitation light, for example, the light source may be an LD or an LED, and the arrangement position and number of the light sources are also not specifically limited in the embodiment of the present application, and those skilled in the art may perform the arrangement according to the actual situation, and may arrange one light source on one side of the wavelength conversion structure 130 as shown in fig. 1, or arrange light sources on both sides of the wavelength conversion structure 130 respectively.

The utility model provides a fluorescence optical module 100, including the light source, and set up in the wavelength conversion structure 130 of light source light-emitting direction, wavelength conversion structure 130 is including the filter element 133 of range upon range of setting, fluorescent layer 131 and dichroic element 132, the light beam that the light source sent incides fluorescent layer 131 and excites fluorescent material of fluorescent layer 131 and forms the exciting light, the exciting light is to a plurality of direction scattering, the exciting light that shines to filter element 133 sees through filter element 133 outgoing, the exciting light that shines to dichroic element 132 is emergent after filter element 133 transmission after dichroic element 132 reflects, dichroic element 132 and filter element 133 cooperation can be collected the exciting light of two directions and make more exciting lights collected, thereby improve fluorescence optical module 100's light-emitting efficiency.

Alternatively, as shown in fig. 2, the light source includes a first light source 110 disposed on the side of the filter element 133 and a second light source 140 disposed on the side of the dichroic element 132, the light beam emitted from the first light source 110 passes through the filter element 133 and enters the fluorescent layer 131, the light beam emitted from the second light source 140 passes through the dichroic element 132 and enters the fluorescent layer 131, and the dichroic mirror 120 is disposed between the first light source 110 and the filter element 133.

In order to improve the light emitting efficiency of the fluorescent optical module 100, light sources may be disposed on both sides of the wavelength conversion structure 130, specifically, a first light source 110 is disposed on one side of the filter element 133 and a second light source 140 is disposed on one side of the dichroic element 132, a light beam emitted from the first light source 110 is irradiated to the surface of the filter element 133 and is transmitted into the fluorescent layer 131 by the filter element 133, and a fluorescent material of the fluorescent layer 131 forms an excitation light under irradiation of the light beam emitted from the first light source 110; the light beam emitted by the second light source 140 is irradiated onto the surface of the dichroic element 132, and since the wavelength of the light beam emitted by the second light source 140 satisfies the transmission wavelength of the dichroic element 132, the light beam emitted by the second light source 140 is irradiated to the fluorescent layer 131 through the dichroic element 132, and the fluorescent material in the fluorescent layer 131 forms excitation light under the irradiation of the light beam emitted by the second light source 140.

The light beam emitted by the second light source 140 and the light beam emitted by the first light source 110 simultaneously excite the fluorescent material in the fluorescent layer 131 to form excitation light, so that the light emitting efficiency of the fluorescent optical module 100 is improved.

In addition, in order to make the excitation light emitted from the filter element 133 go through in the opposite direction of the light emitting direction of the first light source 110, and to make the excitation light emitted from the filter element 133 go through and exit in a turning manner without affecting the light beam emitted from the first light source 110 to enter the wavelength conversion structure 130, since the light beam emitted from the first light source 110 and the excitation light emitted from the filter element 133 have different wavelengths, the dichroic mirror 120 is disposed between the filter elements 133 and the dichroic mirror 120 is capable of transmitting the light beam emitted from the first light source 110 and reflecting the excitation light emitted from the filter element 133, so that the excitation light goes out in a changing direction.

In one implementation of the embodiments of the present invention, the dichroic element 132 includes a dichroic film formed on the surface of the fluorescent layer 131, or the dichroic element 132 includes a substrate and a dichroic film formed on the surface of the substrate.

Optionally, as shown in fig. 2, the wavelength conversion structure 130 further includes a heat conducting frame 134, and the filter element 133, the fluorescent layer 131, and the dichroic element 132 are disposed in an area enclosed by the heat conducting frame 134.

The heat conduction frame 134 is disposed at the peripheries of the filter element 133, the fluorescent layer 131, and the dichroic element 132, and the heat conduction frame 134 is connected to the outer edges of the above components, so that heat generated by the above components can be timely conducted out through the heat conduction frame 134, and the thermal stability of the wavelength conversion structure 130 is improved. The specific material of the heat conducting frame 134 is not particularly limited in the embodiments of the present application as long as it has good heat conducting property, and examples thereof may be aluminum, copper, siC, and Al ₂ O ₃ SiN, alN, and the like.

In addition, the filter element 133, the fluorescent layer 131 and the dichroic element 132 are arranged in the area enclosed by the heat conduction frame 134, and the outer edges of the filter element 133, the fluorescent layer 131 and the dichroic element 132 are connected with the inner side wall of the heat conduction frame 134, so that the position stability of the filter element 133, the fluorescent layer 131 and the dichroic element 132 can be improved, and the stability of the fluorescent optical module 100 is improved.

In an implementation manner of the embodiment of the present invention, a blocking ring 135 is further disposed between the heat conducting frame 134 and the fluorescent layer 131 for reflecting the excitation light irradiated to the blocking ring 135 and blocking the external parasitic light.

As can be seen from the foregoing, the first light source 110 and the second light source 140 excite the fluorescent material in the fluorescent layer 131 to form excitation light, the excitation light is scattered in all directions, the excitation light emitted to the edge of the fluorescent layer 131 leaks from the edge of the fluorescent layer 131, in order to block the leakage of the excitation light emitted to the edge of the fluorescent layer 131, the blocking ring 135 is disposed at the periphery of the fluorescent layer 131, and the blocking ring 135 is used for reflecting the excitation light emitted to the edge of the fluorescent layer 131, so that the excitation light emitted to the edge of the fluorescent layer 131 is emitted back into the fluorescent layer 131 for further excitation, thereby avoiding the leakage of the excitation light and improving the light extraction efficiency of the excitation light.

In addition, the blocking ring 135 can reflect external stray light, so as to prevent the external stray light from being irradiated into the fluorescent layer 131 to excite excitation light with other wavelengths, and thus the uniformity of the light wavelength of the emergent light is realized.

Optionally, the blocking ring 135 is a white glue ring 136, or a metal ring, and the side of the metal ring close to the fluorescent layer 131 is a light reflecting surface. The reflective surfaces of the white glue and the metal rings have high reflectivity, so that light beams irradiated to the surfaces of the white glue and the metal rings are reflected, the phenomenon that exciting light in the fluorescent layer 131 leaks from the edge of the fluorescent layer 131 is avoided, and the influence of external stray light on the fluorescent optical module 100 is also avoided.

In an implementation manner of the embodiment of the present invention, as shown in fig. 2, a collimator set 150 is further disposed between the dichroic mirror 120 and the wavelength conversion structure 130.

The excitation light emitted from the filter element 133 enters the side surface of the dichroic mirror 120, and is scattered in all directions, so that the direction of the excitation light emitted from the filter element 133 is diffused toward the periphery, and the collimator set 150 is arranged between the dichroic mirror 120 and the wavelength conversion structure 130, and the collimator set 150 can focus the excitation light along the light emitting direction of the first light source, so that more excitation light can be collected and enter the side surface of the dichroic mirror 120 and be reflected, and the light emitting efficiency of the fluorescence optical module 100 is improved.

In addition, the collimating lens group 150 can also collimate the light beam emitted by the first light source 110, so that more light beams are incident on the fluorescent layer 131, and the fluorescent material in the fluorescent layer 131 is excited to form excitation light, thereby improving the output of the excitation light, and improving the light extraction efficiency of the fluorescent optical module 100.

As an implementation manner, as shown in fig. 2, the collimating lens group 150 includes a biconvex lens 151 and a plano-convex lens 152 disposed along the light emitting direction of the first light source, and the plane of the plano-convex lens 152 faces the wavelength converting structure 130.

Specifically, plano-convex lens 152 and biconvex lens 151 all have the effect of focusing on the light beam, excitation light is from the plane incidence plano-convex lens 152 of plano-convex lens 152, according to the image map of plano-convex lens 152, make the excitation light assemble, the divergence angle to the excitation light converges, then incident biconvex lens 151, according to the image map of biconvex lens 151, make the excitation light further assemble, the divergence angle to the excitation light converges once more, thereby can collect the side and the reflection of more excitation light incident dichroic mirror 120, thereby improve fluorescence optical module 100's light-emitting efficiency.

Alternatively, the filter element 133, the dichroic element 132, and the fluorescent layer 131 may be made of SiC or Al ₂ O ₃ SiN, alN and diamond. The material has good light transmission capacity and good heat conduction performance, so that the transmission efficiency of each part of the wavelength conversion structure 130 can be improved, and the heat conductivity of each part of the wavelength conversion structure 130 can be improved.

It should be noted that the above-mentioned materials are only examples of the materials of the components of the wavelength converting structure 130, and the materials of the components of the wavelength converting structure 130 are not limited, and any material that can satisfy the requirements of high light transmission capability and high thermal conductivity may be used as the material of the components of the wavelength converting structure 130.

As a practical manner, the light emitted from the light source directly enters the wavelength conversion structure, and the light source includes an LED light source or an LD light source.

Because the LED light source has a broad spectrum characteristic, the distance between the LED light source and the wavelength conversion structure 130 is small when the LED light source is set, and the LD light source has a narrow spectrum characteristic, the distance between the LD light source and the wavelength conversion structure 130 is large when the LD light source is set, when the first light source 110 is the LED light source, and the second light source is the LD light source, the light source of the fluorescence optical module 100 is a mixed light source, which can solve the problem of speckle of a single light source in the prior art, on the other hand, multiple light sources are selectively applicable, and the applicability of the fluorescence optical module 100 can be improved.

When the first light source 110 is an LED light source and the second light source is also an LED light source, the LED light source has a wide spectrum characteristic and a small distance from the wavelength conversion structure 130, so that the size of the fluorescent optical module 100 can be reduced.

It should be noted that, when the second light source is an LED light source, the second light source is usually configured as a square chip, and in order to improve the light extraction efficiency of the fluorescent optical module 100, the thickness of the fluorescent layer 131 is less than or equal to 20% of the diameter of the circumscribed circle of the LED light source chip. Since the thinner the thickness of the fluorescent layer 131 is, the higher the excitation efficiency of the fluorescent layer 131 is.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a fluorescence optical module which characterized in that, includes the light source, and set up in the wavelength conversion structure of light source light-emitting direction, the wavelength conversion structure is including the optical filter element, fluorescent layer and the dichroic element that range upon range of setting, the light beam incidence of light source outgoing the fluorescent layer and arouse the fluorescent material of fluorescent layer forms the exciting light, shine to the dichroic element the exciting light is through behind the dichroic element reflection via the outgoing after the optical filter element transmission.

2. The fluorescence optical module according to claim 1, wherein the light source includes a first light source disposed on a side of the filter element and a second light source disposed on a side of the dichroic element, a light beam emitted from the first light source is transmitted through the filter element and incident on the phosphor layer, a light beam emitted from the second light source is transmitted through the dichroic element and incident on the phosphor layer, and a dichroic mirror is disposed between the first light source and the filter element.

3. The fluorescence optical module according to claim 1, wherein the dichroic element comprises a dichroic film formed on a surface of the phosphor layer, or the dichroic element comprises a substrate and a dichroic film formed on a surface of the substrate.

4. The fluorescence optical module according to claim 1, wherein the wavelength conversion structure further comprises a thermally conductive frame, and the filter element, the phosphor layer, and the dichroic element are disposed in an area enclosed by the thermally conductive frame.

5. The fluorescence optical module of claim 4, wherein a blocking ring is further disposed between said thermally conductive frame and said phosphor layer.

6. The fluorescence optical module according to claim 5, wherein the blocking ring is a white glue ring or a metal ring, and a side surface of the metal ring close to the phosphor layer is a light reflecting surface.

7. The fluorescence optical module according to claim 2, further comprising a set of collimating lenses disposed between the dichroic mirror and the wavelength conversion structure.

8. The fluorescence optical module of claim 7, wherein the set of collimating lenses comprises a biconvex lens and a plano-convex lens disposed along a light exit direction of the first light source, a plane of the plano-convex lens facing the wavelength converting structure.

9. The fluorescence optical module of claim 1, wherein the filter element, the dichroic element, and the phosphor layer are formed of SiC, al ₂ O ₃ SiN, alN and diamond.

10. The fluorescence optical module of claim 1, wherein the light source emits light directly into the wavelength converting structure, and the light source comprises an LED light source or an LD light source.