CN110518109B - Optical lens assembly - Google Patents

Abstract

The present invention discloses an optical lens assembly, comprising an integrally formed compound eye lens and a TIR lens group, wherein the TIR lens group is annularly arranged around the periphery of the compound eye lens, and the TIR lens group comprises at least two groups of TIR toothed ring units arranged in an inner and outer stack, wherein the at least two groups of TIR toothed ring units are gradually sunken from the outside to the inside, and the area surrounded by the toothed ring of the outermost TIR toothed ring unit is a light source installation accommodation area. The optical lens assembly has a light processing effect with good light uniformity and high light efficiency, and can be applied to various types of LED light sources, and the TIR lens group can be flexibly changed in design to broaden the application and improve the practicality.

Description

Optical lens assembly

Technical Field

The invention relates to the field of lens components for lamps, in particular to an optical lens component.

Background technique

In order to achieve the most uniform illumination of the light spot, LED lamps usually configure related secondary optical devices in the light source's light output direction to collect and process the light. The most commonly used secondary optical devices are reflective cups and TIR lenses. Compared with reflective cups, the effect of the lens generally has no secondary light spot, and the light shape is more beautiful. Because of the TIR design, the light output efficiency is relatively high. With the widespread application of TIR lenses in LED lamps, there are differences in the light effect processing of existing conventional TIR lenses when facing different light sources, especially high-power LED light sources, and there are deficiencies in the processing of light spot uniformity.

Summary of the invention

The purpose of the present invention is to provide an optical lens assembly with a light processing effect of good light uniformity and high light efficiency, which can be applicable to various types of LED light sources, and the TIR lens group can be flexibly changed in design to broaden the application and improve the practicality.

In order to achieve the above object, the solution of the present invention is:

An optical lens assembly comprises an integrally formed compound eye lens and a TIR lens group, wherein the TIR lens group is annularly arranged around the periphery of the compound eye lens, and the TIR lens group comprises at least two groups of TIR toothed ring units which are stacked inside and outside, and the at least two groups of TIR toothed ring units are gradually sunken from outside to inside, and the area surrounded by the toothed ring of the outermost TIR toothed ring unit is a light source installation accommodation area.

The TIR gear ring unit is composed of a cylindrical inner surface and a conical outer surface, and the conical outer surfaces of at least two groups of TIR gear ring units have the same taper.

The optical lens assembly also includes a lens housing seat, which is integrally formed around the periphery of the TIR lens group.

The lens housing seat is provided with a mounting hole which is beneficial to the installation of the optical lens assembly.

A sealing ring is also provided on the lens housing seat.

The optical lens assembly also includes a sapphire phosphor, which is formed by sintering glass powder and phosphor on sapphire. The phosphor and glass powder are sintered on the sapphire at a surface on the sapphire that is opposite to the light source when the optical lens assembly is used.

The fluorescent powder is any one of red fluorescent powder, green fluorescent powder and yellow fluorescent powder, or a mixture of at least two of them.

After adopting the above scheme, the present invention provides an optical lens assembly, which is processed by a compound eye lens and a TIR lens group in combination with light processing. The lens periphery adopts a specially designed TIR lens group, and at least two groups of TIR toothed ring units can perform a partitioned (at least two zones) residual light collection process on the light source in the light source installation accommodation area. Especially for high-power LED light sources, the light source distribution area is relatively large, and the partitioned residual light collection process is adopted, the residual light collection rate is improved, and the processing effect is excellent. The compound eye lens is used in the center of the lens for dispersion processing to effectively compensate for the uneven distribution of light, and finally a light processing effect with good light uniformity and high light efficiency is obtained. It can be applied to various types of light sources, and the TIR lens group can be flexibly changed in design to broaden the application and improve practicality.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of an optical lens assembly of the present invention;

FIG. 2 is a schematic diagram of another embodiment of the optical lens assembly of the present invention.

Description of symbols

Fly-eye lens 1, TIR gear ring unit 2, cylindrical inner surface 21, conical outer surface 22,

Lens housing 3, sealing ring 31, light source 4;

Sapphire phosphor 5 , sapphire glass 51 , phosphor 52 , and support portion 53 .

Detailed ways

The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

The present case involves an optical lens assembly, as shown in FIG1, comprising an integrally formed fly-eye lens 1 and a TIR lens group 2. The TIR lens group 2 is annular and arranged around the periphery of the fly-eye lens 1, and the TIR lens group 2 comprises at least two groups of TIR toothed ring units arranged in an inner and outer stack. FIG1 shows a specific implementation scheme, in which the TIR lens group 2 comprises three groups of TIR toothed ring units arranged in an inner and outer stack, which are TIR toothed ring units 2a, 2b, and 2c from the outside to the inside.

The area surrounded by the outermost TIR toothed ring unit (such as 2a in FIG1 ) is the installation and accommodation area of the light source 4. That is, the area surrounded by the outermost TIR toothed ring unit is the maximum arrangement area where the light source 4 can be extended and arranged.

The at least two groups of TIR toothed ring units are gradually sunken from the outside to the inside. As shown in FIG1 , the vertical distance between the tip of the toothed ring and the compound eye lens 1 in the center of the three groups of TIR toothed ring units 2a, 2b, and 2c is gradually reduced, and vice versa, the vertical distance between the tip of the toothed ring and the light source 4 is gradually increased. Thus, each of the at least two groups of TIR toothed ring units can give full play to the function of collecting the partitioned residual light, so that the light energy can be effectively and evenly utilized to the maximum extent. The range of variation of the gradually reduced (or gradually increased) setting can be flexibly adjusted according to the actual product requirements.

Each TIR gear ring unit is composed of a cylindrical inner surface 21 and a conical outer surface 22. The conical outer surfaces 22 of at least two groups of TIR gear ring units have the same taper. By adjusting and changing the taper, the light output angle can be effectively controlled.

The optical lens assembly of the present invention is designed with a combination and partitioning concept. A specially designed TIR lens group 2 is used on the periphery. At least two groups of TIR toothed ring units can perform partitioned (at least two zones) residual light collection processing on the light source 4 in the light source installation and accommodation area. Especially for high-power LED light sources, the light source distribution area is relatively large. The partitioned residual light collection processing is adopted to improve the residual light collection rate and achieve excellent processing effect. The center adopts a compound eye lens 1 to cooperate with the dispersion processing to effectively compensate for the uneven distribution of light. For centralized and/or high-power light sources, the compensation is outstanding. Through the above-mentioned internal and external combination and partition processing, a light processing effect with good light uniformity and high light efficiency is finally obtained.

The present invention can be applied to various types of light sources, especially high-power LED light sources, and the TIR lens group 2 can be flexibly changed and adjusted according to different types of light sources, thereby expanding the application of the lens assembly and improving the practicality.

In an effective solution, the optical lens assembly further includes a lens housing 3, which is integrally formed around the periphery of the TIR lens group 2. The design of the lens housing 3 is conducive to the installation of the optical lens assembly. Further, a mounting hole is provided on the lens housing 3, which is conducive to the installation of the optical lens assembly. In addition, a sealing ring 31 is also provided on the lens housing 3 to play a role in waterproof and dustproof protection.

In a preferred embodiment, the optical lens assembly of the present invention further includes a sapphire phosphor 5. The light emitting direction of the optical lens assembly is taken as a reference direction, and the reference direction has a direction from front to back. The positional relationship between the sapphire phosphor 5 and the compound eye lens 1 and the TIR lens group 2 integrally formed on the lens housing 3 is that they are arranged side by side along the reference direction, and the front and rear positions can be arbitrarily swapped. Specifically, when the sapphire phosphor 5 is behind the lens housing 3, the two can be arranged closely, and the sapphire phosphor 5 is arranged on the outer surface of the lens housing 3 and covers the entire light emitting surface. When the sapphire phosphor 5 is in front of the lens housing 3, the two are arranged at intervals (as shown in FIG. 2), and at this time, the sapphire phosphor 5 is within the area surrounded by the tooth ring of the outermost TIR tooth ring unit; and in the application of the optical lens assembly, the sapphire phosphor 5 is arranged at intervals from the light source 4.

The sapphire phosphor 5 is a glass powder and a phosphor 52 sintered on a sapphire. The phosphor 52 and the glass powder are sintered on the sapphire at the surface of the sapphire corresponding to the side opposite to the light source (light source 4) in the application of the optical lens assembly. The sapphire phosphor 5 thus formed is equivalent to including sapphire glass 51 and phosphor 52. The light source 4 excites the phosphor 52 to form the desired light color. The phosphor 52 can be designed to have a corresponding color according to actual needs. In a specific embodiment, the phosphor is any one of red phosphor, green phosphor and yellow phosphor, or a mixture of at least two colors.

The optical lens assembly with the sapphire phosphor 5 is particularly suitable for use in high-power light sources. Sapphire is a transparent and heat-resistant material, and has the characteristics of good light transmittance and good heat resistance. For example, the high-power light source is a blue light luminous body, which emits high-luminous flux blue light through the sapphire, and the heat generated by it will not cause any adverse effects on the sapphire phosphor 5 as a whole, especially the phosphor 52, ensuring that the high-power light source continues to work effectively and well meets the luminous performance requirements.

Preferably, in a specific embodiment, a sapphire phosphor 5 is assembled in a manner that is designed with a support portion 53 for mounting and supporting the sapphire phosphor 5, and the support portion 53 realizes that the sapphire phosphor 5 and the light source and the lens housing 3 (compound eye lens 1) are all arranged at intervals with a gap. As a preferred solution, the support portion 53 corresponds to the high thermal conductivity ring surrounding the light source, that is, the sapphire phosphor is mounted on the high thermal conductivity ring, so that it plays a certain heat dissipation role on the sapphire phosphor. The high thermal conductivity ring preferably has a thermal conductivity coefficient of more than 8w/mk. In a preferred embodiment, aluminum nitride ceramic containing 96% aluminum oxide is used.

The above descriptions are only preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims (5)

1. An optical lens assembly, characterized in that: it comprises an integrally formed compound eye lens and a TIR lens group, the TIR lens group is annularly arranged around the periphery of the compound eye lens, the TIR lens group comprises at least two groups of TIR toothed ring units arranged in an inner and outer stack, the at least two groups of TIR toothed ring units are gradually sunken from the outside to the inside, and the area surrounded by the toothed ring of the outermost TIR toothed ring unit is a light source installation accommodation area; the optical lens assembly also comprises a sapphire phosphor, the sapphire phosphor is sintered glass powder and phosphor powder on sapphire, the position of the phosphor powder and glass powder sintered on the sapphire is, In the application of the lens assembly, the surface of the sapphire corresponds to the side opposite to the light source; the phosphor is any one of red phosphor, green phosphor and yellow phosphor, or a mixture of at least two colors; a support part is designed to install and support the sapphire phosphor, and the support part realizes that the sapphire phosphor and the light source, the lens shell seat, and the compound eye lens are all arranged with gaps; the support part corresponds to the high thermal conductivity ring with a thermal conductivity coefficient of more than 8w/mk surrounding the light source, and the sapphire phosphor is mounted on the high thermal conductivity ring; the high thermal conductivity ring is made of aluminum nitride ceramic containing 96% aluminum oxide. 2. An optical lens assembly as described in claim 1, characterized in that the TIR gear ring unit is composed of a cylindrical inner surface and a conical outer surface, and the taper of each conical outer surface of at least two groups of TIR gear ring units is the same. 3. An optical lens assembly as claimed in claim 1, characterized in that the optical lens assembly further comprises a lens housing seat, and the lens housing seat is integrally formed around the periphery of the TIR lens group. 4. An optical lens assembly as claimed in claim 3, characterized in that: the lens housing seat is provided with a mounting hole which is beneficial to the installation of the optical lens assembly. 5. An optical lens assembly as claimed in claim 3, characterized in that a sealing ring is also provided on the lens housing seat.