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Ultra-thick ceramic lens, method for manufacturing ultra-thick ceramic lens, and laser lighting device

A manufacturing method and laser lighting technology, applied in the field of laser lighting, can solve problems such as the decline of luminous quality, blank optical lenses, and low strength of plastic and glass materials, so as to suppress the increase of the angle of outgoing light, reduce the loss of light transmission, and light Can use efficient effect

Active Publication Date: 2021-02-26
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Plastic materials and glass materials with excellent optical quality can be obtained by optimizing the formula and preparation process, and they are easy to form and process. It is prone to expansion and contraction deformation, aging and yellowing under ultraviolet radiation, high temperature and long-term working conditions, which seriously affect the luminous quality, luminous efficiency and service life; second, the low refractive index of plastic materials and glass materials makes the lens The focal length of the lens is larger, which increases the volume of the lighting system. In order to reduce the focal length, it is usually preferred to use a lens material with a higher refractive index, such as adding lead oxide to the glass composition to obtain flint glass to achieve an increase in the refractive index, but oxidation Lead is harmful to the environment and human health; third, plastic and glass materials have low strength and poor weather resistance, and are prone to surface damage and bulk damage under conditions of high temperature, high humidity, high pressure, and abrasion, resulting in a decline in luminous quality
However, the research and application of optical lenses based on transparent ceramic materials in the field of optical imaging and non-imaging is still blank.

Method used

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  • Ultra-thick ceramic lens, method for manufacturing ultra-thick ceramic lens, and laser lighting device
  • Ultra-thick ceramic lens, method for manufacturing ultra-thick ceramic lens, and laser lighting device
  • Ultra-thick ceramic lens, method for manufacturing ultra-thick ceramic lens, and laser lighting device

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Experimental program
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Effect test

Embodiment 1）

[0069] Figure 4 It is the physical photo of the ultra-thick transparent ceramic prepared in embodiment 1, Figure 5 is the linear transmittance curve of the ultra-thick transparent ceramic. In this embodiment, a mold with a diameter of 80 mm is selected.

[0070] 1) Weigh 1.13 kg of high-purity yttrium aluminum garnet powder and put it into a mold. Before applying pre-compression pressure, it is oscillated together with the mold to make the raw material powder fully and evenly arranged to suppress the occurrence of defects. Then perform pre-compression molding, and the pre-compression pressure is 15MPa.

[0071] 2) The pre-pressed raw material is subjected to cold isostatic pressing under a pressure of 200 MPa to obtain a green body.

[0072] 3) Next, pre-fire the green body in vacuum and keep it warm at 1600°C for 3 hours to obtain a pre-fired body.

[0073] 4) Then carry out hot isostatic pressing sintering to the above-mentioned pre-sintered body, and keep the temperat...

Embodiment 2）

[0078] The structure of the laser lighting device 100 is as follows: figure 1 As shown, it includes a light source module 101, an ultra-thick ceramic lens 102, a housing 103, and an electrical wiring 104 for connecting the light source module 101 to a power source not shown. Figure 6 It is a physical photo of the ultra-thick ceramic lens 102 prepared in Example 2.

[0079] First, the surface shape parameters of the ultra-thick ceramic lens 102 are set according to the size and configuration of the laser lighting device 100 and the illumination requirements of the spot on the lighting surface. According to the surface shape parameters, a square mold with a side length of 130×130mm is designed. Next, the preparation of ultra-thick transparent ceramics and the fabrication of ultra-thick ceramic lenses are carried out.

[0080] 1) Weigh 1.5Kg of high-purity yttrium aluminum garnet powder and put it into the mold. Before applying pre-compression pressure, shake it together with...

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Abstract

The invention relates to a super-thick ceramic lens, a manufacturing method of the super-thick ceramic lens and a laser lighting device. A super-thick ceramic lens is a super-thick ceramic lens formedby processing super-thick transparent ceramic, and comprises an incident plane formed into a plane shape; an outer surface, which is in a cylindrical shape and is perpendicular to the incident surface; and an exit surface which is located on the opposite side of the incident surface and is formed in a curved surface shape. The raw material of the ultra-thick transparent ceramic is one of yttriumaluminum garnet, magnesium aluminate spinel and aluminum-oxygen-nitrogen ceramic powder; the diameter range of the ultra-thick ceramic lens is 10-120 mm, the center thickness range of the ultra-thickceramic lens is 2-30 mm, and the curvature radius range of the emergent surface of the ultra-thick ceramic lens is 90-130 mm; the refractive index of the ultra-thick ceramic lens is 1.65-2.0, the Vickers hardness of the ultra-thick ceramic lens is 13-20 GPa, and the bending strength of the ultra-thick ceramic lens is 220-450 MPa.

Description

technical field [0001] The invention relates to the technical field of laser lighting, in particular to an ultra-thick ceramic lens, a manufacturing method of the ultra-thick ceramic lens and a laser lighting device. Background technique [0002] The optical lens is one of the core optical components in the semiconductor lighting system. With the help of the optical lens, the beam of the light source can be shaped according to the needs, and the beam with a specific diffusion angle and a specific shape can be obtained. With the rapid development of the semiconductor lighting industry, optical lens materials have received extensive attention. At present, there are mainly two types of plastic lenses and glass lenses. Among them, the main materials of plastic lenses include polyurethane, PC and silicone, etc.; the main materials of glass lenses include quartz glass and BK7 glass. Plastic materials and glass materials with excellent optical quality can be obtained by optimizin...

Claims

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Application Information

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IPC IPC(8): G02B1/04G02B1/113G02B3/00C04B35/44C04B35/443C04B35/581C04B35/622
CPCG02B1/041G02B1/113G02B3/00C04B35/44C04B35/443C04B35/581C04B35/622C04B41/87C04B41/5031C04B2235/3225C04B2235/3895C04B2235/6581C04B2235/661C04B2235/656C04B2235/6567
Inventor 胡松覃显鹏周国红毛小建章健王士维
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI