CN111413805A

CN111413805A - Reflective laser lighting structure

Info

Publication number: CN111413805A
Application number: CN202010461070.2A
Authority: CN
Inventors: 史晓庆
Original assignee: Individual
Current assignee: Shanghai Jiwei Technology Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-07-14

Abstract

A reflective laser illumination structure, comprising: one end of the light guide rod is an inclined plane; one surface of the fluorescent piece is tightly attached to the inclined surface of the light guide rod, and the other surface of the fluorescent piece is provided with a reflecting layer; the excitation light beam is incident on the fluorescent member from the non-inclined side of the light guide rod, and the excited fluorescent light and the unabsorbed excitation light beam are homogenized by the light guide rod and are emitted from the other end. The inclined plane of the light guide rod has an inclination angle of 15-75 degrees, and the light guide rod is a solid light guide rod or a hollow light guide rod. The fluorescent part is a fluorescent ceramic piece, and the wavelength of the excitation light beam is a blue laser beam with the central wavelength of 450 nm. The invention can improve the condition that the spot light color of the prior reflective laser illumination is uneven, so that the laser illumination has better illumination effect.

Description

Reflective laser lighting structure

Technical Field

The invention belongs to the technical field of optics, and particularly relates to a reflective laser lighting structure with uniform light color spots.

Background

The laser light source has the advantages of energy concentration, good collimation and the like, a point light source with extremely high energy density can be formed by beam shaping, a white light source formed by exciting a fluorescent ceramic plate by utilizing the point light source can be used for designing a laser searchlight with a very small divergence angle of a light beam, and the irradiation distance of the laser searchlight is far greater than that of a xenon lamp and an L ED lamp under the same power.

Disclosure of Invention

The embodiment of the invention provides a reflective laser lighting structure, which is used for improving the condition that the light color of a current reflective laser lighting spot is uneven.

In order to achieve the above object, the present invention discloses a reflective laser illumination structure, comprising: one end of the light guide rod is an inclined plane; one surface of the fluorescent piece is tightly attached to the inclined surface of the light guide rod, and the other surface of the fluorescent piece is provided with a reflecting layer; the excitation light beam is incident on the fluorescent member from the non-inclined side of the light guide rod, and the excited fluorescent light and the unabsorbed excitation light beam are homogenized by the light guide rod and are emitted from the other end.

Optionally, the light guide rod is a solid light guide rod or a hollow light guide rod.

Optionally, the inclined plane inclination angle is between 15 and 75 degrees.

Optionally, a selective transflective layer is disposed on the opposite side of the inclined plane of the light guide rod, or no selective reflective layer is disposed.

Optionally, the selective reflection layer is highly reflective to the excitation light beam and highly transmissive to the excited fluorescence.

Optionally, the side surface of the light guide rod may be provided with a reflective layer, or may not be provided with a reflective layer.

Optionally, the light reflecting layer arranged on the side surface of the light guide rod is a coated reflecting layer or a light reflecting film layer.

Optionally, the fluorescent member is a fluorescent ceramic sheet.

Optionally, the excitation beam wavelength is a blue laser beam with a center wavelength of 450 nm.

The technical scheme provided by the invention can have the following beneficial effects:

the fluorescent part with the reflecting layer is attached to the inclined plane of the light guide rod, the excitation light beam is incident to the fluorescent part from the non-inclined plane side, the excited fluorescent light and the unabsorbed excitation light beam can be directly emitted after being homogenized by the light guide rod, and light beams with uniform light spots are formed, so that the laser illumination has a better illumination effect.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

fig. 1 is a schematic view of a reflective laser lighting structure according to one embodiment of the present invention.

FIG. 2 is a schematic diagram of a reflective laser illumination light path according to one embodiment of the present invention.

Fig. 3 is a schematic diagram of a reflective laser illumination structure according to one embodiment of the present invention.

Fig. 4 is a schematic diagram of a reflective laser illumination structure according to one embodiment of the present invention.

Fig. 5 is a schematic diagram of a reflective laser illumination structure according to one embodiment of the present invention.

Detailed Description

According to one or more embodiments, as shown in fig. 1, a reflective laser lighting structure includes a light guide bar 100, one end of which is a slope 1001, a fluorescent member 101, one side of which is closely attached to the slope 1001 of the light guide bar and the other side of which is provided with a reflective layer 102, an excitation light beam 108 incident on the fluorescent member 101 from the non-slope side of the light guide bar 100, the excited light beam and the unabsorbed excitation light beam 108 being homogenized by the light guide bar 100 and emitted from the other end 1002, wherein the light guide bar 100 is a solid rectangular light guide bar made of BK7 glass, the cross-sectional dimension of which is 5 × mm, the length of which is 50mm, the inclination angle of the slope 1001 is 45 °, a reflective transmissive layer 103 is provided on the opposite side of the slope 1001 to transmit the excitation light beam 108 and reflect the excited fluorescent light beam,

reflective film layers

104, 105, 106, and 107 are attached to the side of the light guide bar 100, the light beam which does not satisfy the total reflection condition in the light guide bar 100 is reflected, the reflective layer 103 and the reflective layer 107 are placed side by side, the reflective layer 103, the reflective layer 108 is selectively reflective layer 103, the white light beam 108 is selectively transmitted by the excitation light beam 108, the laser light with the central wavelength of 450nm, the power of which is 6W, the fluorescent light beam 101, the fluorescent light beam is polished white light beam, the fluorescent light beam 102.

Fig. 2 is a schematic diagram of a reflection type laser illumination light path. The excitation light beam 108 is transmitted through the selective reflection transmission layer 103 and incident on the fluorescent member 101, the fluorescent member 101 is attached to the reflection layer 102, and a part of the forward emission light is reflected by the reflection layer 102 back to the light guide rod 100. The light in the light guide rod 100 is divided into three parts, one part is the light which directly exits from the end face 1002 without reflection as shown by the light 109; the other part meets the total reflection condition as shown by the light ray 110, and is emitted from the end surface 1002 after being totally reflected by the light guide rod 100; the last part, as shown by the light ray 111, does not satisfy the total reflection condition, and is emitted from the side surface of the light guide rod 100, reflected back into the light guide rod by the

reflective film layers

104, 105, 106, and 107, and emitted from the end surface 1002 after being reflected. All the light rays are mixed to form a uniform light beam and then are emitted from the end face 1002.

According to one or more embodiments, as shown in fig. 3, a reflective laser lighting structure includes a light guide rod 112 having one end of an inclined plane 1121, a fluorescent member 113 having one surface closely attached to the inclined plane 1121 of the light guide rod and the other surface provided with a reflective layer 1131, an excitation light beam 108 incident on the fluorescent member 113 from the non-inclined side of the light guide rod 112, the excited fluorescence and the unabsorbed excitation light beam 108 being homogenized by the light guide rod 112 and emitted from the other end 1122, wherein the light guide rod 112 is a solid circular light guide rod made of BK7 glass having a diameter of 2.4mm, an inclination angle of the inclined plane 1121 is 60 °, the excitation light beam 108 is incident on the fluorescent member 113 from the opposite side of the inclined plane 1121, the fluorescent member 113 is a ceramic fluorescent sheet, the size is a minor axis and a major axis is 2.4 × 2.7.7 mm, the reflective layer 1131 is an elliptical reflective layer, which may be a metal film, may be a film, the excitation light beam 108 is a blue light beam having a central wavelength of 450nm, the laser power is 6W, the excitation light beam 108 is incident on the fluorescent member 113, and the white light is not satisfied with the light emitted from the light mixed with the light of the light guide rod 112, and emitted from the side wall of.

According to one or more embodiments, as shown in fig. 4, a reflective laser lighting structure includes a light guide rod 114 having one end formed as an inclined surface 1141, a fluorescent member 101 having one surface closely attached to the inclined surface 1001 of the light guide rod and the other surface provided with a reflective layer 102, an excitation light beam 108 incident on the fluorescent member 101 from the non-inclined surface side of the light guide rod 114, the excited fluorescence and the unabsorbed excitation light beam 108 being homogenized by the light guide rod 114 and emitted from the other end 1142, wherein the light guide rod 114 is a solid light guide rod having a rectangular cross section and gradually enlarged from one end to the other end, the inclined surface 1141 has a size of 5 × mm, the emission end surface 1142 has a size of 18 3618 mm, the material is BK7 glass, the inclined surface 1141 has an inclination angle of 45 °, a selective reflective transmission layer 103 is provided on the opposite side of the inclined surface 1411 to transmit the excitation light beam 108 and reflect the excited fluorescence, the excited fluorescence is reflected by the excitation light beam 108, the

reflective layer

1143, 1144, 1145 (not shown in the figure) is coated on the side of the light guide rod 114, the reflective layer reflects the fluorescence light beam 108, the fluorescence is selectively reflected by the reflective layer 1147, the fluorescent light beam 102, the fluorescent light beam 108 is a fluorescent light beam with a white light beam, the fluorescent light beam 108 is reflected by the fluorescent light beam 108, the fluorescent light beam 108 is reflected by the fluorescent light beam, the fluorescent light beam 108, the fluorescent light beam is focused by the fluorescent light beam.

According to one or more embodiments, as shown in fig. 5, a reflective laser illumination structure includes a light guide bar 115, one end of which is an inclined plane 1155, a fluorescent member 101, one side of which is closely attached to the inclined plane 1155 of the light guide bar, and the other side of which is provided with a reflective layer 102, an excitation light beam 108 which is incident on the fluorescent member 101 from the non-inclined side of the light guide bar 115, and excited fluorescence and unabsorbed excitation light beam 108 which is homogenized by the light guide bar 115 and exits from the other end 1156, wherein the light guide bar 115 is a hollow rectangular light guide bar, the cross-section dimension of which is 7 × mm, which is defined by four

elongated light reflectors

1151, 1152, 1153 and 1154, the inner walls of the

light reflectors

1151, 1152, 1153 and 1154 are coated with a reflective film layer, the inclined plane 1155 has an inclination angle 43, a selective reflective transmission layer 103 is provided on the opposite side of the inclined plane 1155, the selective reflective transmission layer is transmissive to the excitation light beam 108, and reflective to the excited fluorescence is reflective to the reflective transmission layer 103, wherein the selective reflective transmission layer 103 is juxtaposed to the reflective layer 3, the fluorescent light beam 108 is a fluorescent light beam transmitted by the central wavelength of 1156, the yellow laser light beam, the fluorescent light beam 102, the fluorescent light beam 100 mm, the fluorescent light beam is focused by the fluorescent light beam 102, the fluorescent light guide bar 101, the fluorescent light beam 102 is focused by the fluorescent.

It should be noted that while the foregoing has described the spirit and principles of the invention with reference to several specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in these aspects cannot be combined. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A reflective laser illumination structure, comprising:

one end of the light guide rod is an inclined plane;

one surface of the fluorescent piece is tightly attached to the inclined surface of the light guide rod, and the other surface of the fluorescent piece is provided with a reflecting layer;

the excitation light beam is incident on the fluorescent member from the non-inclined side of the light guide rod, and the excited fluorescent light and the unabsorbed excitation light beam are homogenized by the light guide rod and are emitted from the other end.

2. The structure of claim 1, wherein the light guide rod is a solid light guide rod or a hollow light guide rod.

3. The reflective laser illumination structure of claim 1, wherein the slope angle is between 15 ° and 75 °.

4. The structure of claim 1, wherein the light guide rod is provided with a selective transflective layer on opposite sides of the slanted surface, or is not provided with a selective reflective layer.

5. The structure of claim 4, wherein the selective reflector layer is highly reflective to the excitation beam and highly reflective to the excited fluorescence.

6. The structure of claim 1, wherein the side of the light guide rod may or may not be provided with a reflective layer.

7. The structure of claim 6, wherein the light-reflecting layer disposed on the side of the light-guiding rod is a coated reflecting layer or a light-reflecting film layer.

8. The structure of claim 1, wherein the phosphor is a phosphor plate.

9. The reflective laser illumination structure of claim 1, wherein the excitation beam wavelength is a blue laser beam having a center wavelength of 450 nm.