CN210465983U - Light source coupling structure of laser diode - Google Patents
Light source coupling structure of laser diode Download PDFInfo
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- CN210465983U CN210465983U CN201922011854.0U CN201922011854U CN210465983U CN 210465983 U CN210465983 U CN 210465983U CN 201922011854 U CN201922011854 U CN 201922011854U CN 210465983 U CN210465983 U CN 210465983U
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Abstract
The utility model relates to an optical structure, the utility model discloses aim at solving current laser instrument and increasing the problem of laser diode back output facula bore, provide a laser diode's light source coupling structure, include: the laser device comprises a first laser diode array, a second laser diode array and a dichroic mirror, wherein the first laser diode array emits a first beam group, the second laser diode array emits a second beam group, the dichroic mirror comprises a plurality of coating regions, the propagation direction of the first beam group emitted by the first laser diode array can be kept unchanged after penetrating through the corresponding coating regions of the dichroic mirror, and the second beam group emitted by the second laser diode array can be coupled with the first beam group penetrating through the coating regions after being reflected by the corresponding coating regions of the dichroic mirror. The utility model discloses furthest's reduction facula bore has improved the output luminous power of system.
Description
Technical Field
The utility model relates to an optical structure relates to a laser diode's light source coupling structure particularly.
Background
The laser has the advantages of good monochromaticity, high brightness and the like, so that the visible light laser source has outstanding advantages compared with the traditional projection light source mercury lamp, xenon lamp, halogen lamp and the like, and the frequency of the laser diode used in optical products is higher and higher.
With the increasing brightness requirements of projectors, a single laser in many light source systems cannot meet the increasing demand, and meanwhile R, G, B laser technology is mature, and a product with integrated three-primary-color lasers appears in the market. In the prior art, in order to improve the output optical power of a laser, the number of laser diodes generally needs to be increased, but after the number of the laser diodes is increased, the aperture of an output light spot is also increased, and a rear-end lighting system is difficult to receive light.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving current laser instrument and increasing the problem of output facula bore behind the increase laser diode, provide a laser diode's light source coupling structure.
The utility model provides a technical scheme that above-mentioned technical problem adopted is: a light source coupling structure for a laser diode, comprising: the laser device comprises a first laser diode array, a second laser diode array and a dichroic mirror, wherein the first laser diode array emits a first beam group, the second laser diode array emits a second beam group, the dichroic mirror comprises a plurality of coating regions, the propagation direction of the first beam group emitted by the first laser diode array can be kept unchanged after penetrating through the corresponding coating regions of the dichroic mirror, and the second beam group emitted by the second laser diode array can be coupled with the first beam group penetrating through the coating regions after being reflected by the corresponding coating regions of the dichroic mirror.
As a further optimization, the first and second light beam groups comprise red and/or green and/or blue light, respectively.
As a further optimization, the first laser diode array comprises: a first red laser diode, a second red laser diode, a first green laser diode, and a first blue laser diode, the second laser diode array comprising: a third red laser diode, a fourth red laser diode, a second green laser diode, and a second blue laser diode, the dichroic mirror comprising: the red light source comprises a first coating area, a second coating area and a third coating area, wherein the first coating area can enable red light to penetrate through and enable blue light and green light to be reflected, the second coating area can enable green light to penetrate through and enable red light to be reflected, the third coating area can enable blue light to penetrate through and enable red light to be reflected, light beams emitted by the first red laser diode and the second red laser diode penetrate through the first coating area, light beams emitted by the first green laser diode penetrate through the second coating area, light beams emitted by the first blue laser diode penetrate through the third coating area, light beams emitted by the second blue laser diode are coupled with light beams of the first red laser diode after being reflected by the first coating area, light beams emitted by the second green laser diode are coupled with light beams of the second red laser diode after being reflected by the first coating area, and light beams emitted by the fourth red laser diode are coupled with light beams of the first green laser diode after being reflected by the second coating area And the light beam emitted by the third red laser diode is coupled with the light beam of the first blue laser diode after being reflected by the third coating area.
As a further optimization, the first beam group emitted by the first laser diode array and the second beam group emitted by the second laser diode array are collimated parallel beam groups respectively.
As a further optimization, the second coating area and the third coating area are the same in structure and material, and the second coating area and the third coating area can allow green light and blue light to penetrate through and reflect red light.
As a further optimization, the first laser diode array horizontally emits the first beam group, the second laser diode array vertically emits the second beam group, and the dichroic mirror is placed at an angle of 45 degrees.
The utility model has the advantages that: laser diode's light source coupled structure, dichroic mirror through the subregion coating film, make the first light beam group of first laser diode array transmission pierce through, make the reflection of the second light beam group of second laser diode array transmission, realize the coupling of first light beam group and second light beam group, reach the effect of closing a bundle, through under the condition that does not change optical aperture, through in organizing the reflection to the system with the second light beam that second laser diode array produced, compare in traditional laser coupling mode, design benefit, compact structure, furthest has reduced the facula bore, the receipts light degree of difficulty of rear-end lighting system has been reduced, be favorable to designing out the ray apparatus engine of high coupling efficiency.
Drawings
Fig. 1 is a schematic view of a light source coupling structure of a laser diode according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a laser diode array according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dichroic mirror according to an embodiment of the present invention;
description of reference numerals:
a-a first laser diode array; a B-dichroic mirror; c-a second laser diode array.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Laser diode's light source coupled structure, include: the laser device comprises a first laser diode array, a second laser diode array and a dichroic mirror, wherein the first laser diode array emits a first beam group, the second laser diode array emits a second beam group, the dichroic mirror comprises a plurality of coating regions, the propagation direction of the first beam group emitted by the first laser diode array can be kept unchanged after penetrating through the corresponding coating regions of the dichroic mirror, and the second beam group emitted by the second laser diode array can be coupled with the first beam group penetrating through the coating regions after being reflected by the corresponding coating regions of the dichroic mirror.
The dichroic mirror comprises a plurality of coating areas, primary colors of a first light beam in a first light beam group received by the same coating area are different from primary colors of a second light beam in a second light beam group, the first light beam emitted by a laser diode with one primary color in the first laser diode array penetrates through the coating area and continues to propagate along the original direction after being incident to one coating area of the dichroic mirror, a second light beam emitted by a laser diode with the other primary color in the second laser diode array is incident to the coating area, is reflected by the coating area and then is coupled with the first light beam, the classification is carried out in sequence, and the second laser diode array is coupled with the light beam groups of the laser diodes with all primary colors in the first laser diode array through the plurality of coating areas of the dichroic mirror, so that the beam combining effect is realized.
Examples
In this embodiment, the first laser diode array a and the second laser diode array C are both 4 × 4 laser diode arrays, as shown in fig. 2, the first laser diode array a includes four rows of laser diodes, which are respectively a first red laser diode, a second red laser diode, a first green laser diode and a first blue laser diode, and the second laser diode array C also includes four rows of laser diodes, which are respectively a third red laser diode, a fourth red laser diode, a second green laser diode and a second blue laser diode, wherein the emission spectrum of the red laser diode is 636nm to 640nm, the peak wavelength is 638nm, the emission spectrum of the green laser diode is 522nm to 527nm, the peak wavelength is 525nm, the emission spectrum of the blue laser diode is 463nm to 467nm, the peak wavelength was 465 nm.
The dichroic mirror B in this embodiment includes three coating regions, as shown in fig. 3, which are a first coating region, a second coating region and a third coating region, respectively, where the first coating region is capable of allowing red light to pass through and reflecting blue light and green light, and specifically, the first coating region is capable of allowing a light beam with an emission spectrum of 636nm to 640nm to have a transmittance of 98% or more, and a light beam with an emission spectrum of 463nm to 527nm to have a reflectance of 98% or more, and the first coating region may be a high pass filter; the second coating area can enable green light to penetrate through and reflect red light, and specifically, the second coating area enables the penetration rate of light beams with the luminescence spectrum of 522nm-527nm to be greater than or equal to 98%, the reflectivity of light beams with the luminescence spectrum of 636nm-640nm to be greater than or equal to 98%, and the second coating area can be a low-pass filter; the third coating region can allow blue light to penetrate and reflect red light, and specifically, the third coating region can allow the transmittance of light beams with the emission spectrum of 463nm to 467nm to be greater than or equal to 98%, the reflectivity of light beams with the emission spectrum of 636nm to 640nm to be greater than or equal to 98%, and the third coating region can be a low-pass filter. In actual use, the technical specification of the coating area is slightly wider, and the coating can be realized as long as the basic requirements are met.
As shown in fig. 1, in the present embodiment, the first laser diode array a horizontally emits the first beam group, the second laser diode array C vertically emits the second beam group, the first beam group emitted by the first laser diode array a and the second beam group emitted by the second laser diode array C are collimated parallel beam groups, respectively, and the dichroic mirror B is disposed at an angle of 45 degrees.
In the first laser diode array A, light beams emitted by a first red laser diode and a second red laser diode penetrate through a first coating area, light beams emitted by a first green laser diode penetrate through a second coating area, light beams emitted by a first blue laser diode penetrate through a third coating area, in the second laser diode array C, light beams emitted by a second blue laser diode are coupled with light beams of the first red laser diode after being reflected by the first coating area, light beams emitted by the second green laser diode are coupled with light beams of the second red laser diode after being reflected by the first coating area, light beams emitted by a fourth red laser diode are coupled with light beams of the first green laser diode after being reflected by the second coating area, and light beams emitted by the third red laser diode are coupled with light beams of the first blue laser diode after being reflected by the third coating area.
Optionally, the second coating region and the third coating region have the same structure and material, and the second coating region and the third coating region can allow green light and blue light to penetrate therethrough and reflect red light. Specifically, the dichroic mirror may be divided into two coating regions, the first coating region being one coating region for allowing red light to pass therethrough and reflecting blue light and green light, and the second coating region and the third coating region being the other coating region for allowing blue light and green light to pass therethrough and reflecting red light, thereby reducing costs.
In summary, through the above spatial layout and the divisional coating, it is obviously possible to realize that the first light beam emitted by the first laser diode array a is transmitted by the dichroic mirror B and the second light beam emitted by the second laser diode array C is reflected by the dichroic mirror B, so that the two light beams can be combined, and under the condition that the aperture of the light spot is not increased relative to the aperture of one laser diode array, the light receiving difficulty of the rear-end illumination system is reduced, and the output optical power of the system is improved.
Claims (6)
1. A light source coupling structure for a laser diode, comprising: the laser device comprises a first laser diode array, a second laser diode array and a dichroic mirror, wherein the first laser diode array emits a first beam group, the second laser diode array emits a second beam group, the dichroic mirror comprises a plurality of coating regions, the propagation direction of the first beam group emitted by the first laser diode array can be kept unchanged after penetrating through the corresponding coating regions of the dichroic mirror, and the second beam group emitted by the second laser diode array can be coupled with the first beam group penetrating through the coating regions after being reflected by the corresponding coating regions of the dichroic mirror.
2. The light source coupling structure of claim 1, wherein the first and second light beam groups comprise red and/or green and/or blue light, respectively.
3. The light source coupling structure for a laser diode of claim 1, wherein the first laser diode array comprises: a first red laser diode, a second red laser diode, a first green laser diode, and a first blue laser diode, the second laser diode array comprising: a third red laser diode, a fourth red laser diode, a second green laser diode, and a second blue laser diode, the dichroic mirror comprising: the red light source comprises a first coating area, a second coating area and a third coating area, wherein the first coating area can enable red light to penetrate through and enable blue light and green light to be reflected, the second coating area can enable green light to penetrate through and enable red light to be reflected, the third coating area can enable blue light to penetrate through and enable red light to be reflected, light beams emitted by the first red laser diode and the second red laser diode penetrate through the first coating area, light beams emitted by the first green laser diode penetrate through the second coating area, light beams emitted by the first blue laser diode penetrate through the third coating area, light beams emitted by the second blue laser diode are coupled with light beams of the first red laser diode after being reflected by the first coating area, light beams emitted by the second green laser diode are coupled with light beams of the second red laser diode after being reflected by the first coating area, and light beams emitted by the fourth red laser diode are coupled with light beams of the first green laser diode after being reflected by the second coating area And the light beam emitted by the third red laser diode is coupled with the light beam of the first blue laser diode after being reflected by the third coating area.
4. The light source coupling structure of claim 3, wherein the first group of beams emitted by the first laser diode array and the second group of beams emitted by the second laser diode array are collimated parallel beams, respectively.
5. The light source coupling structure of claim 3, wherein the second and third coating regions are made of the same material and structure, and wherein the second and third coating regions are transparent to green and blue light and reflective to red light.
6. The light source coupling architecture of claim 1, wherein the first laser diode array emits the first beam set horizontally and the second laser diode array emits the second beam set vertically, and wherein the dichroic mirror is positioned at a 45 degree angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922011854.0U CN210465983U (en) | 2019-11-20 | 2019-11-20 | Light source coupling structure of laser diode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922011854.0U CN210465983U (en) | 2019-11-20 | 2019-11-20 | Light source coupling structure of laser diode |
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| CN210465983U true CN210465983U (en) | 2020-05-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625522A (en) * | 2021-08-18 | 2021-11-09 | 青岛海信激光显示股份有限公司 | Laser projection system |
| WO2023020595A1 (en) * | 2021-08-18 | 2023-02-23 | 青岛海信激光显示股份有限公司 | Laser device and laser projection device |
-
2019
- 2019-11-20 CN CN201922011854.0U patent/CN210465983U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625522A (en) * | 2021-08-18 | 2021-11-09 | 青岛海信激光显示股份有限公司 | Laser projection system |
| WO2023020595A1 (en) * | 2021-08-18 | 2023-02-23 | 青岛海信激光显示股份有限公司 | Laser device and laser projection device |
| CN113625522B (en) * | 2021-08-18 | 2023-08-22 | 青岛海信激光显示股份有限公司 | Laser projection system |
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