Light splitter and optical transmitter configuration with a light splitter
AssigneeUnaxis Balzers Aktiengesellschaft
InventorsJohannes Edlinger, Claus Heine
Life of this patent
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Abstract
A spectrally selective light splitter divides white light into red, green and blue light or recombines white light from red, green and blue light using two separate coating systems. Each system reflects and transmits color selectively, and are applied or embedded on or in at least one transparent base body, with at least one of the coating systems is made up of 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. For the lower refractive index NLS: 1.7≦NLS≦2.1 and the reflective index Nk of at least the transparent base body on which the system is applied follows the rule: 1.52≧Nk≧1.
Claims56
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:
- two coating systems, each reflecting and transmitting color selectively, said coating system being embedded in at least one transparent base body;
- least one of the coating systems comprising 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.
Spectrally selective light splitter and recombining device, which divides white light into red, green and blue light or being output at respective output surfaces and recombines red, green and blue light input to respective ones of said output surfaces, with two separate coating systems, each reflecting or transmitting color-selectively, which are applied or embedded on or in at least one transparent base body, which at least one body determines an emergent face each for the red, green and blue light, wherein at least one emergent face is tilted 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 φ, deviating from zero, and specifically by more than is caused by a fabrication tolerances of the light splitter, for which applies:
- φ≦5°.
Optical transmission arrangement with a light splitting and recombining device which device 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, further comprising, adjacent to said output surfaces, 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 arrangement.
Spectrally selective light splitting and recombining device, which device 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, said spectrally selective light splitting and recombining device defining for central propagation axes of output red, green and blue light wherein said output surfaces define for a surface normal being warped with respect to said respective axis by an angle for which there applies
- φ≦5°.
Dependencies are inferred from the claim text.