[특허]Lens with textured surface facilitating light diffusion

Lens with textured surface facilitating light diffusion 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F21V-005/08 F21V-005/04 B29D-011/00 G02B-003/00 F21Y-115/10
출원번호	US-0625712 (2015-02-19)
등록번호	US-9915409 (2018-03-13)
발명자 / 주소	Wilcox, Kurt Raleigh, Craig Goldstein, Corey
출원인 / 주소	Cree, Inc.
대리인 / 주소	Jansson Munger McKinley & Kirby Ltd.
인용정보	피인용 횟수 : 0 인용 특허 : 39

초록 ▼

A lens for distribution of light from a light emitter. The lens has thick and thin wall portions between inner and outer lens surfaces. The thick wall portion(s) are at least twice as thick as the thin wall portion(s). At least one of the inner and outer surfaces has a texturing for diffusion of emitter light passing therethrough. The lens may include at least one interface between two materials with different indices of refraction. At least one surface of the interface may have a texturing for diffusion of emitter light passing therethrough. And, a method for manufacturing of the lens by forming a lens region with a textured surface portion by injecting the thermoplastic elastomer into an injection-molding cavity defined by a shape-forming configuration with a texturing in at least one area of the cavity. The shape-forming configuration is configured to shape a thermoplastic elastomer into such thickness that the set elastomer retains the texturing.

대표청구항 ▼

1. A lens for distribution of light from a light emitter, the lens comprising multiple joined regions of at least one thermoplastic material forming thick and thin wall portions between inner and outer lens surfaces, the inner surface including front and back surface portions and front and back end-surface segments each extending from the respective front and back surface portions, the front surface portion and the front end-surface segment having a texturing for diffusion of emitter light passing therethrough. 2. The lens of claim 1 wherein at least two of the regions are of materials with different indices of refraction. 3. The lens of claim 2 wherein the outer lens surface includes a textured surface portion for diffusion of the light received from the inner surface. 4. The lens of claim 1 wherein the inner surface defines an inner cavity receiving light from the light emitter, the texturing is on a portion of the inner surface defining an innermost region of the inner cavity. 5. The lens of claim 4 wherein: the light emitter has an axis; andthe innermost region of the inner cavity is positioned on the emitter axis for diffusion of axial emitter light. 6. The lens of claim 5 being substantially rotationally symmetrical about the emitter axis. 7. The lens of claim 6 wherein the innermost region of the cavity is substantially conical with the vertex of the cavity on the emitter axis. 8. The lens of claim 1 wherein the outer lens surface includes a textured surface portion for diffusion of light received from the inner surface. 9. The lens of claim 8 wherein: the light emitter has an axis; andthe textured outer surface portion is positioned on the emitter axis, whereby to further diffuse axial emitter light. 10. The lens of claim 9 being substantially rotationally symmetrical about the emitter axis. 11. A lens for distribution of light from a light emitter, the lens comprising: multiple joined regions forming thick and thin wall portions between a light-receiving inner surface and a light-output outer surface,at least two of the regions are of materials with different indices of refraction, the light-receiving inner surface including front and back surface portions and front and back end-surface segments each extending from the respective front and back surface portions, the front surface portion and the front end-surface segment having texturing for diffusion of emitter light passing therethrough. 12. The lens of claim 11 wherein at least one surface of an interface between the regions has a further texturing on a light-receiving surface of the at least one interface. 13. The lens of claim 11 wherein the light-receiving inner surface defines an inner cavity receiving light from the light emitter. 14. The lens of claim 13 wherein: the light emitter has an axis; andthe textured inner surface portion is an innermost region of the inner cavity positioned on the emitter axis for diffusion of axial emitter light. 15. The lens of claim 14 wherein the innermost region of the cavity is substantially conical with the vertex of the cavity on the emitter axis. 16. The lens of claim 11 wherein the light-output outer surface includes a textured outer surface portion for diffusion of received light. 17. The lens of claim 16 wherein: the light emitter has an axis; andthe textured inner surface portion is an innermost region of the inner cavity positioned on the emitter axis for diffusion of axial emitter light.

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