Dual light source enhanced integration system

Patent metadata

Field	Value
Publication number	US-9810891-B2
Application number	US-201514687133-A
Country	US
Kind code	B2
Filing date	Apr 15, 2015
Priority date	Apr 15, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A dual light source enhanced integration system is provided. The system comprises: a first light source and a second light source with overlapping spectra; a light integrator configured to integrate light and having a first light entrance face and a second light entrance face; and, a beamsplitter system configured to about equally distribute light from each of the first light source and the second light source to each of the first light entrance face and the second light entrance face, such that the light from each of the first light source and the second light source is about equally combined at each of the first light entrance face and the second light entrance face.

First claim

We claim:

1. A system comprising:
a first light source configured to emit a first given colour of light;
a second light source configured to emit a second given colour of light, the second given colour different from the first given colour, respective spectra for each of the first colour and the second colour overlapping with each other;
a light integrator comprising: at least one body configured to integrate light, the at least one body comprising a respective length and a light egress end; a first light entrance device comprising a first light entrance face, the first light entrance device located distal the light egress end; and a second light entrance device comprising a second light entrance face parallel the first light entrance face; each of the first light entrance device and the second light entrance device configured to receive light and deflect the light into the at least one body and towards the light egress end; and,
a beamsplitter system configured to equally distribute light from each of the first light source and the second light source to each of the first light entrance face and the second light entrance face,
the beamsplitter system comprising a beamsplitter, a first mirror at the first light entrance face, and a second mirror at the second light entrance face,
the beamsplitter configured to: transmit half of the first given colour of light from the first light source to the second mirror; reflect a remaining half of the first given colour of light from the first light source to the first mirror; transmit half of the second given colour of light from the second light source to the first mirror; and, reflect a remaining half of the second given colour of light from the second light source to the second mirror,
the first mirror configured to: reflect the remaining half of the first given colour of light from the first light source into the first light entrance face; and reflect the half of the second given colour of light from the second light source into the first light entrance face,
the second mirror configured to: reflect the half of the first given colour of light from the first light source into the second light entrance face; and reflect the remaining half of the second given colour of light from the second light source into the second light entrance face,
such that the light from each of the first light source and the second light source is equally combined at each of the first light entrance face and the second light entrance face, the light entering both of the first light entrance face and the second light entrance face has the same characteristics with regards to at least colour and intensity.

2. The system of claim 1 , wherein the beamsplitter system further comprises one or more optical components.

3. The system of claim 1 , wherein the beamsplitter comprises: one or more of a 50/50 beamsplitter and a polarizing beamsplitter.

4. The system of claim 1 , wherein the first light entrance face and the second light entrance face are facing in opposite directions.

5. The system of claim 1 , wherein the first light entrance face and the second light entrance face are facing in a same direction.

6. The system of claim 1 , wherein the first light entrance face and the second light entrance face are facing in opposite directions, and the light sources and the beamsplitter system are physically symmetric with respect to a longitudinal axis of the at least one body.

7. The system of claim 1 , wherein the first light entrance and the second light entrance are laterally displaced from one another along a longitudinal axis of the respective length and perpendicular an axis normal to the first light entrance face.

8. The system of claim 1 , wherein each of the first light source and the second light source are configured to emit collimated light.

9. The system of claim 1 , further comprising optical components configured to collimate light of each of the first light source and the second light source.

10. The system of claim 1 , wherein lengths of respective light paths from each of the first light source and the second light source to each of the first light entrance face and the second light entrance face are equal.

11. The system of claim 1 , wherein etendues of each of the first light source and the second light are within 40% of one another.

12. The system of claim 1 , wherein the at least one body comprises: a first body configured to convey the light from the first light entrance device towards the light egress end; and a second body configured to convey the light from the second light entrance device towards the light egress end.

13. The system of claim 1 , wherein each of the first mirror and the second mirror are flat.

14. The system of claim 1 , wherein light from each of the first light source and the second light source is collimated, and each of the first mirror and the second mirror is curved, a curve of each of the first mirror and the second mirror selected so that collimated light received from the beamsplitter is reflected to respective light entrance faces of the integrator.

15. The system of claim 1 , wherein each of the respective spectra for each of the first colour and the second colour comprise respective peaks, and the respective peaks of the first and second colour are reduced when combined.

Assignees

• Christie Digital Systems Usa

Inventors

• Adema Daniel Robert
• Ma Joseph
• Hill Graham

Classifications

• G02B19/0028 Primary

  refractive and reflective surfaces, e.g. non-imaging catadioptric systems · CPC title

• G02B19/0047

  for use with a light source (G02B19/009, G02B19/0095 take precedence; details of lighting devices in general F21V; non-semiconductor lasers having optical devices external to the laser cavity H01S3/005) · CPC title

• G03B21/208

  Homogenising, shaping of the illumination light · CPC title

• G03B21/2073

  Polarisers in the lamp house (peculiar to electronic spatial light modulators H04N9/3197) · CPC title

• G03B21/2013

  Plural light sources · CPC title