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Transmission type laser illumination module, light uniformizing method and application

A laser lighting and transmission technology, applied in the field of laser lighting, can solve the problems of fusion of safety and optical functions, and the lack of research on the safety of laser lighting, and achieve the effect of light weight, small size and high light extraction rate

Pending Publication Date: 2022-03-22
广州旭福光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, there are not many studies on the safety of laser lighting in the existing technology, and some designs use electromechanical control methods, but do not integrate safety and optical functions.

Method used

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  • Transmission type laser illumination module, light uniformizing method and application
  • Transmission type laser illumination module, light uniformizing method and application
  • Transmission type laser illumination module, light uniformizing method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The wavelength conversion unit PIC of the module in this embodiment is a YAG fluorescent ceramic chip (white light), and is not coated with an AR-BP composite film or an anti-reflection film.

[0057] read on Figure 1-3 , the settings (meters) and functions of each unit, device, component, reflector, and base are the same as before and will not be described in detail. LD has an emission wavelength of 450nm and an optical power of 5.0W; the flat-top shaping lens is a negative cylindrical lens with a central thickness of 2.0mm, a focal length of -15mm, a clear aperture of 85%, and a distance of 1.0mm from the LD; the thickness of the micro-nano lens array 1.2mm, unit size 20μm, full angle of divergence 10°, randomly arranged microlens array is made by quartz etching, the incident light S1 surface of the lens is coated with blue light anti-reflection coating, the light transmittance is 95%; the wavelength conversion unit is PIC (brand XUFU , model XF-PIC-6000K-0303), whe...

Embodiment 2

[0063] Please continue to refer to Figure 1-3shown. This embodiment is substantially the same as the embodiment of Example 1. The only difference is that in this embodiment, the module wavelength conversion unit PIC is coated with an AR-BP composite film and an anti-reflection film. Coating AR-BP composite film with anti-reflection blue light reflection yellow light (including ≥500nm) on the incident surface of PIC laser, its optical properties: 400-485nm band, incident angle 0±5°, Rave≤0.5%@400-485nm, Tave ≥98.6%@400-485nm, Tave≤0.8%@500-800nm; using SiO 2 、 Ta 2 o 5 Alternate coating as bottom layer, SiO 2 , HfO 2 Alternate coating is used as the surface layer, the thickness of the bottom layer is 3000nm, the thickness of the surface layer is 300nm, and the material purity is ≥99.99%. Anti-reflection film is coated on the light exit surface of PIC, its optical properties: 400-800nm ​​segment (incident angle 0±5°), R≤0.8%, Tave≥95%@400-800nm, film thickness 300nm, usi...

Embodiment 3

[0067] Please continue to refer to Figure 1-3 shown. This embodiment is substantially the same as the embodiment of Example 2. The only difference is that in this embodiment, the wavelength conversion unit PIC of the module is a LuAG green fluorescent ceramic chip (brand XUFU, model XF-PIC-525nm-0303), and the scattering medium Al is added when the PIC is fired. 2 o 3 , D50: 0.6μm, 7% of the mass of the phosphor powder added), the module is not equipped with a homogenizing rod, the LD is an emission wavelength of 450nm, the optical power is 5.0W, and the actual input electric power is 7.8W.

[0068] The luminous flux, color temperature, and luminous efficacy data measured in Example 3 are shown in Table 2; it can be seen that the luminous efficacy of the module in Example 3 is high, but the light uniformity is poor and the dispersion is large.

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Abstract

The invention belongs to the field of laser illumination, and particularly discloses a transmission type laser illumination module, a light uniformizing method and application. The transmission type laser illumination module comprises a laser unit, a flat-topped shaping lens, a reflection unit, a micro-nano lens array, a wavelength conversion unit, a light homogenizing rod and a free-form surface reflector. The uniformity of emergent light is remarkably improved through flat top shaping of the negative cylindrical mirror, light uniformizing and beam expanding of the micro-nano lens array, light uniformizing of the wavelength unit scattering medium and light uniformizing of the light uniformizing rod. The laser incident surface of the wavelength conversion unit is plated with the AR-BP composite film, and the light emergent surface is plated with the anti-reflection film, so that the light extraction efficiency is improved, and the light efficiency of the module is improved. In addition, the optical function of the light uniformizing rod and laser safety are fused, light uniformizing and protection can be achieved, and an inherent safety structure is formed. And if the wavelength conversion unit is damaged, the dodging rod can shield the laser, so that the laser is prevented from leaking to hurt human eyes or cause potential risks such as fire disasters.

Description

technical field [0001] The invention belongs to the field of laser lighting, and in particular relates to a transmissive laser lighting module, a uniform light method and its application. Background technique [0002] In laser lighting applications, the Gaussian distribution of laser light and the laser speckle phenomenon caused by laser interference greatly affect the quality of lighting, especially through excitation and luminescence. The specific performance is: for white light lighting, the central light intensity is high, the edge light intensity is low, the middle color temperature is high, the edge color temperature is low, the middle is bluish, the edge is yellowish, and the light color difference is large. Shaping the laser output beam and suppressing the laser speckle at the same time is an urgent problem to be solved to improve the laser lighting effect. [0003] The laser transmits the excitation of fluorescent crystals (fluorescent ceramics, fluorescent single ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V5/04F21V5/00F21V5/08F21V7/04F21V7/24F21V9/30F21Y115/30
CPCF21V5/04F21V5/043F21V5/004F21V5/08F21V7/04F21V7/24F21V9/30F21Y2115/30
Inventor 叶峰叶匡政
Owner 广州旭福光电科技有限公司
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