# US 9,039,250 B2 · Reflector assembly for eliminating unwanted stray lights

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- Number: US 9,039,250 B2
- Document ID: US9039250B2
- Status: Granted
- Kind: B2
- Application number: 13/958,630
- Filed: 2013-08-05
- Published: 2015-02-05
- Granted: 2015-05-26
- Earliest claimed: 2013-08-05
- Assignees: Kaper Industrial Limited
- Applicants: Shiu-Fai Stephen Man
- Inventors: Shiu-Fai Stephen Man
- Web page: https://patentgrep.com/patent/US9039250B2

## CPC

- F21V 13/02: Combinations of only two kinds of elements
- F21L 4/005: {the device being a pocket lamp (F21L4/022, F21L4/045, F21L4/085 take precedence)}
- F21V 7/06: with parabolic curvature
- F21V 13/04: the elements being reflectors and refractors {(for vehicle rear lights F21S43/40)}
- F21V 3/00: Globes; Bowls; Cover glasses (with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506)
- F21V 7/00: Reflectors for light sources (characterised by cooling arrangements F21V29/505)
- F21V 7/04: Optical design
- F21V 13/08: the elements being filters or photoluminescent elements and reflectors
- F21V 13/14: the elements being filters or photoluminescent elements, reflectors and refractors
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21L: LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A reflector assembly for eliminating unwanted stray lights comprising a reflector body having a reflector body focal point on a reflector body optical axis where a light source is positioned and a front opening for receiving a lens, wherein the lens is configured to reflect light rays which emanate from the light source to strike the lens to the reflector body which is configured to reflect the light rays reflected by the lens back to the light source, and to reflect light rays which emanate from the light source and reflected by the reflector body to strike the lens back to the light source.

## Claims

### Claim 1

A reflector assembly for eliminating unwanted stray lights comprising a reflector body having a reflector body focal point on a reflector body optical axis where a light source is positioned and a front opening for receiving a lens, wherein the lens is configured to reflect light rays which emanate from the light source to strike the lens to the reflector body which is configured to reflect the light rays reflected by the lens back to the light source, and to reflect light rays which emanate from the light source and reflected by the reflector body to strike the lens back to the light source; wherein the reflector body is substantially parabolic so that light rays which emanate from the light source to strike the reflector body are reflected in a forward direction parallel to the reflector body optical axis, and the lens has a substantially spherically concave curvature with respect to the light source with a lens reflective focal point overlapping with the reflector body focal Point, and a radius of curvature equal to two times a distance from the lens to the lens reflective focal point, so that light rays which emanate from the light source to strike the lens are reflected by the lens in a backward direction parallel to the reflector body optical axis to the reflector body which is configured to reflect the light rays reflected by the lens back to the light source, and to reflect light rays which emanate from the light source and reflected by the reflector body to strike the lens in a direction parallel to the reflector body optical axis back to the light source.

### Claim 2 (depends on 1)

The reflector assembly as in claim 1, wherein the reflector body is configured to reflect light rays which emanate from the light source to strike the reflector body in a forward direction to focus at a point at a predetermined distance.