Claims
- 1. A method for manufacturing an X-cube having a spectrally selective light splitter and recombining device, which divides white light into red, green and blue light being output and recombines red, green and blue light being input substantially independently of light polarization, comprising the steps of:providing two coating systems, each reflecting and transmitting color-selectively; embedding said coating systems in at least one transparent base body; providing in at least one of said coating systems at least one layer of a material with lower refractive index as well as at least one layer of a material with higher refractive index; selecting for the lower refractive index NLS: 1.7≦NLS≦2.1; and selecting for the refractive index NK of the at least one transparent base body: 1.52≧NK≧1.
- 2. A method according to claim 1, wherein NLS=1.8±2%.
- 3. A method according to claim 1, wherein the material with the lower refractive index is a mixed material comprising at least two materials m1, m2, Wherein: Nm1≧1.05 NLS and Nm2≦0.95 NLS.
- 4. A method according to claim 1, wherein the material with the higher refractive index substantially comprises an oxide or oxynitride selected from the group consisting of: TiO2, Ta2O5, Nb2O5, HfO2, ZrO2, SiOxNy.
- 5. A method according to claim 1, wherein the material with the lower refractive index comprises TiO2 and/or Ta2O5 as well as at least one of: Y2O3, SiO2, Al2O3, SiOxNy; and the material with the lower refractive index comprises at least predominantly SiO2 and TiO2, with a ratio of the fractions of ASiO2=(60±5)% and ATiO2=(100%-ASiO2).
- 6. A method according to claim 1, wherein the material with the lower refractive index comprises Y2O3.
- 7. A method according to claim 1, wherein, for the refractive index Nk of the material of the at least one base body:Nk=1.45±2%.
- 8. A method according to claim 1, wherein both coating systems are implemented like said at least one coating system.
- 9. A method according to claim 1, wherein the coating systems are substantially embedded along diagonal planes of a base body cuboid, which is at least approximately square considered in a cutting plane perpendicular to a common line of intersection of the coating systems.
- 10. A method according to claim 1, wherein at least one of the emergent faces for the light reflected on at least one of the coating system and resulting from the splitting, is tilted with respect to the direction of emergence of the light such that its face normal forms with said direction an angle p deviating from zero and specifically by more than is caused by fabrication tolerances of the light splitter, for which applies: φ≦5°.
- 11. A method for manufacturing a spectrally selective light splitter and recombining device, which divides white light into red, green and blue light being output at respective output surfaces and recombines red, green and blue light input to respective ones of said output surfaces, comprising the steps of:providing at least two separate coating systems, each reflecting or transmitting color-selectively; embedding or applying said coating systems on or in at least one transparent base body; determining by said at least one body an emergent face each for the red, green and blue light; tilting at least one emergent face with respect to the direction of the light emergent from it and reflected on at least one of the coating systems, such that its face normal forms with this direction an angle p deviating from zero, specifically by more than is caused by fabrication tolerances of the light splitter, for which φ≦5°.
- 12. A method according to claim 11, wherein at least one of the coating systems comprises at least one layer of a material with lower refractive index as well as at least one layer of a material with higher refractive index, wherein for the lower refractive index NLS: 1.7≦NLS≦2.1; and wherein, for a refractive index Nk of the at least one transparent base body: 1.52≧NK≧1.
- 13. A method according to claim 12, wherein NLS=1.8±2%.
- 14. A method according to claim 12, wherein the material with the lower refractive index is a mixed material comprising at least two materials m1, m2, wherein:Nm1≧1.05NLS and Nm2≦0.95NLS.
- 15. A method according to claim 12, wherein the material with the higher refractive index substantially comprises at least an oxide or oxynitride.
- 16. A method according to claim 12, wherein the material with the lower refractive index comprises at least one of the following materials: TiO2, Ta2O5, Nb2O5, HfO2, ZrO2, SiOxNy, andthe material with the lower refractive index comprises predominantly SiO2 and TiO2, with a ratio of the fractions of ASiO2=(60±5)% and ATiO2=(100%-ASiO2).
- 17. A method according to claim 12, wherein the material with the lower refractive index comprises Y2O3.
- 18. A method according to claim 12, wherein the refractive index Nk of the material of the at least one base body is: Nk=1.45±2%.
- 19. A method according to claim 12, wherein both coating systems are implemented like said at least one coating system.
- 20. A method according to claim 12, wherein the device is an X-cube in which the coating systems are substantially embedded along diagonal planes of a base body cuboid, which is at least approximately, square considered in a cutting plane perpendicular to the common line of intersection of the coating systems.
- 21. A method according to claim 12, wherein at least one of the emergent faces for the light reflected on at least one of the coating systems and resulting from the splitting, is disposed tilted with respect to the direction of emergence of this light such that its face normal forms with said direction an angle p deviating from zero and specifically by more than is caused by fabrication tolerances of the light splitter, for which: φ≦5°.
- 22. A method according to claim 11, wherein the device is implemented as an X-cube.
- 23. A method according to claim 11, including, adjacent said output surfaces, providing reflectors for respective of said output light, which reflectors change polarity of light as reflected and wherein light output from respective ones of said output surfaces is reflected at an adjacent surface of respective ones of said reflectors under an angle which deviates more from 0° than caused by manufacturing tolerances of the device, and wherein each of the reflectors is formed by configurations of reflecting light valves.
- 24. A method according to claim 23, wherein the light is reflected on the reflectors at an angle φ wherein: 0°<φ≦5°, with the angle deviating from zero by more than is caused by fabrication tolerances.
- 25. A method according to claim 23, wherein the light reflection at the specified angle takes place on more than one of the reflectors.
- 26. A method according to claim 23, wherein an incident face of the light splitter for the light to be divided comprises one of a polarization beam splitter and an HMI lamp as the illumination source for the incident face.
- 27. A method according to claim 11, including providing at least two coating systems, each reflecting and transmitting color selectively, said coating system being applied or embedded on or in at least one transparent base body, and wherein at least one of the coating systems comprises at least one layer of a material with lower refractive index as well as at least one layer of a material with higher refractive index, wherein for the lower refractive index NLS: 1.7≦NLS≦2.1; andwherein, for a refractive index Nk of the at least one transparent base body: 1.52≧NK≧1.
- 28. A method according to claim 27, wherein NLS=1.8±2%.
- 29. A method according to claim 27, wherein the material with the lower refractive index is a mixed material comprising at least two materials m1, M2, to which materials:Nm1≧1.05NLS and Nm2≦0.95NLS.
- 30. A method according to claim 27, wherein the material with the higher refractive index substantially comprises at least an oxide or oxynitride.
- 31. A method according to claim 27, wherein the material with the lower refractive index comprises at least one of the following materials:TiO2, Ta2O5, Nb2O5, HfO2, ZrO2, SiOxNy, and the material with the lower refractive index comprises predominantly SiO2 and TiO2, with a ratio of the fractions of ASiO2=(60±5)% and ATiO2 =(100%-ASiO2).
- 32. A method according to claim 27, wherein the material with the lower refractive index comprises Y2O3.
- 33. A method according to claim 27, wherein the refractive index Nk of the material of the at least one base body is: Nk=1.45±2%.
- 34. A method according to claim 27, wherein both coating systems are implemented like said at least one coating system.
- 35. A method according to claim 27, wherein the device is implemented as an X-cube in which the coating systems are substantially embedded along diagonal planes of a base body cuboid, which is at least approximately, square considered in a cutting plane perpendicular to the common line of intersection of the coating systems.
- 36. A method according to claim 11, including at least one emergent face for the light reflected on at least one of the coating systems and resulting from the splitting, is disposed tilted with respect to the direction of emergence of this light such that its face normal forms with said direction an angle φ deviating from zero and specifically by more than is caused by fabrication tolerances of the light splitter, for which: φ≦5°.
- 37. A method according to claim 11, wherein the device is implemented as an X-cube.
- 38. A method according to claim 11, including, adjacent said output surfaces, reflectors for respective of said output light, which reflectors change polarity of reflected light and wherein light output from respective ones of said output surfaces is reflected at an adjacent surface of respective ones of said reflectors under an angle which deviates more from 0° than caused by manufacturing tolerances of the device, and wherein each of the reflectors is formed by configurations of reflecting light valves.
- 39. A method according to claim 38, wherein the light is reflected on the reflectors at an angle φ wherein: 0°<φ≦5°, with the angle deviating from zero by more than is caused by fabrication tolerances.
- 40. A method according to claim 38, wherein the light reflection at the specified angle takes place on more than one of the reflectors.
- 41. A method according to claim 38, wherein an incident face of the light splitter for the light to be divided comprises one of a polarization beam splitter and an HMI lamp as the illumination source for the incident face.
Priority Claims (1)
Number |
Date |
Country |
Kind |
207/99 |
Feb 1999 |
CH |
|
CROSS-REFERENCE TO RELATED APPLICATION
This is a divisional of U.S. application Ser. No. 09/267,475, filed Mar. 11, 1999, U.S. Pat. No. 6,288,844.
US Referenced Citations (2)
Number |
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Date |
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5625491 |
Von Gunten et al. |
Apr 1997 |
A |
6295173 |
Hein |
Sep 2001 |
B1 |