Systems and methods for integrating light

• US 7,165,867 B2
• Filed: 07/19/2006
• Issued: 01/23/2007
• Est. Priority Date: 02/05/2004
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Long, Michael, Howard, P. Guy, Gupta, Anurag
• Primary Examiner(s): O'Shea; Sandra
• Assistant Examiner(s): TSIDULKO, MARK
• Application Number:
  US11/490,194
• Publication Number:
  US 20060256562A1
• Time in Patent Office: 188 Days
• Field of Search: 362/328,235,241,339,608-610,613,624,626,627 353/33,81,98,99 359/618,625,639,640,831,837
• US Class Current: 362/328
• CPC Class Codes: G02B 27/0994 Fibers, light pipes optical fibers per se G02B6/02
• CPC Class Codes: G02B 27/126 The splitting element being a prism or prismatic array, including systems based on total internal reflection

Abstract

A light integrating system includes at least one total internal reflection (TIR) prism and a light integrating device disposed to collect and homogenize light exiting from the TIR prism.

Claims

1. A light integrating system comprising:

at least one total internal reflection (TIR) prism, said system having an optical axis along which light moves through said system including through said at least one TIR prism, wherein said optical axis may be bent by said at least one TIR prism; and

a light integrating device disposed to collect and homogenize light exiting from said at least one TIR prism;

wherein surfaces of said at least one TIR prism that are not on said optical axis of said system have a coating to minimize light loss.

2. The system of claim 1, further comprising two or more light sources for emitting light into said light integrating system.

3. The system of claim 1, wherein surfaces of said at least one TIR prism that are not on an optical axis of said system have an aluminized coating to minimize light loss.

4. The system of claim 1, wherein said light integrating device comprises a light integrating tunnel.

5. The system of claim 4, wherein said light integrating tunnel has a rectangular cross-section.

6. The system of claim 4, wherein said light integrating tunnel has reflective material on inner walls of said tunnel for reflecting and homogenizing light from said TIR prism.

7. The system of claim 1, wherein sad light integrating device comprises a light pipe.

8. The system of claim 1, wherein said light integrating device comprises a solid light conducting rod.

9. The system of claim 1, wherein said light integrating device comprises a condenser lens system.

10. The system of claim 1, further comprising a plurality of optical elements that are optically coupled and have an optical axis, wherein said TIR prism is formed at an interface between two of said optical elements.

11. The system of claim 1, further comprising a plurality of TIR prisms disposed along an optical axis, wherein each subsequent TIR prism has a steeper angle than a previous TIR prism along said optical axis.

12. The system of claim 1, further comprising a plurality of TIR prisms disposed along an optical axis and a plurality of light sources disposed to emit light into said TIR prisms such that said TIR prisms integrate light from said light sources.

13. A light integrating system comprising:

a plurality of total internal reflection (TIR) prisms;

wherein said plurality of TIR prisms are disposed in a line along an optical axis with a reflector at one end of said line of TIR prisms for reflecting light back along said optical axis and through each of said TIR prisms.

14. The system of claim 13, further comprising a first set of light sources disposed along one side of said line of TIR prisms and a second set of light sources disposed along an opposite side of said line of TIR prisms.