Optic assembly having virtual external common focus

• US 9,440,580 B2
• Filed: 11/21/2012
• Issued: 09/13/2016
• Est. Priority Date: 11/23/2011
• Status: Active Grant

• Current Assignee: Muth Mirror Systems LLC (K. W. Muth)
• Original Assignee: Muth Mirror Systems LLC (K. W. Muth)
• Inventors: Mathieu, Daniel J., Van Gheem, Seth, Reuter, Thomas W.
• Primary Examiner(s): Chavez, Renee
• Assistant Examiner(s): APENTENG, JESSICA MCMILLAN
• Application Number:
  US13/683,526
• Publication Number:
  US 20130141931A1
• Time in Patent Office: 1,392 Days
• Field of Search: 362/516, 362/487, 362/494
• US Class Current: 1/1
• CPC Class Codes: B60Q 1/2665 on rear-view mirrors lighting devices for vehicle interior on or for rear-view mirrors B60Q3/258
• CPC Class Codes: B60Q 1/34 for indicating change of drive direction B60Q1/22 takes precedence
• CPC Class Codes: B60R 1/12 Mirror assemblies combined with other articles, e.g. clocks
• CPC Class Codes: B60R 2001/1215 with information displays
• CPC Class Codes: G02B 19/0023 at least one surface having optical power
• CPC Class Codes: G02B 27/143 using macroscopically faceted or segmented reflective surfaces
• CPC Class Codes: G09F 21/04 by land vehicles

Abstract

An optic assembly has a reflector with a reflective surface, one or more light sources, and a mask with one or more apertures. Facets on the reflective surface direct light rays so that a substantial portion of the light rays within the optic assembly can be managed as if they were emitted from a focal point located outside the optic assembly.

Claims

1. An optic assembly utilizing a virtual external common focal point, the optic assembly comprising:

a reflector with a reflective surface, the reflective surface having a plurality of facets for reflecting light rays in a plurality of directions, the facets including one or more refocusing facets and one or more converging facets;

a mask assembly defining one or more apertures, the mask assembly substantially enclosing the reflective surface of the reflector and mountable behind a substrate;

a light source substantially enclosed between the mask assembly and reflector;

the one or more refocusing facets direct light rays from the light source so that they become refocused light rays that appear to project from a virtual external common focal point located outside the optic assembly;

the one or more converging facets direct the refocused light rays inside the optic assembly to the outside of the optic assembly through an aperture; and

wherein the optic assembly is capable of illuminating an icon in the substrate.

2. The optic assembly of claim 1, wherein the substrate is a mirror.

3. The optic assembly of claim 1, wherein the mask assembly comprises:

a diffuser capable of scattering light rays emitted from the light source; and

a mask defining one or more apertures, the mask at least partially covering the diffuser such that the diffuser and mask enclose an area between the reflector and the mask assembly.

4. The optic assembly of claim 1, wherein the facets further comprise:

scattering facets for attenuating at least a portion of light rays within the optic assembly.

5. The optic assembly of claim 1, wherein the facets comprise only one refocusing facet and only one converging facet for each aperture.

6. The optic assembly of claim 1, wherein the facets comprise only one converging facet for each aperture.

7. The optic assembly of claim 1, wherein the facets comprise a plurality of refocusing facets for each aperture.

8. The optic assembly of claim 1, wherein the facets comprise a plurality of converging facets for each aperture.

9. The optic assembly of claim 1, wherein the substrate is an automotive mirror assembly.

10. A method for directing light rays from one or more light sources in an optic assembly comprising the steps of:

providing one or more light sources emitting light rays into a reflector, the reflector having a plurality of facets, the facets including one or more refocusing facets and one or more converging facets;

substantially refocusing light rays from the one or more light sources using one or more refocusing facets so that a substantial portion of the light rays are directed so that they appear to project from a virtual external common focal point located outside the optic assembly;

substantially converging at least a portion of the substantially refocused light rays using one or more converging facets on the reflector; and

directing at least a portion of the refocused and converged light rays through an icon in the substrate.

11. A mirror assembly comprising:

a housing;

a substrate mounted in the housing, the substrate capable of functioning as a mirror;

an optic assembly utilizing a virtual external common focal point, the optic assembly comprising;

a reflector with a reflective surface having a plurality of facets for reflecting light rays in a plurality of directions, the facets including one or more refocusing facets and one or more converging facets;

a mask assembly defining one or more apertures, the mask assembly substantially enclosing the reflective surface of the reflector and being capable of being mounted behind the substrate;

a light source at least substantially enclosed between the mask assembly and reflector;

the one or more refocusing facets direct light rays from the light source so that they become refocused light rays that appear to project from a virtual external common focal point located outside the optic assembly;

the one or more converging facets direct the refocused light rays inside the optic assembly to the outside of the optic assembly through an aperture; and

wherein the optic assembly is capable of illuminating an icon in the substrate.