BREWSTER ANGLE FILM FOR LIGHT MANAGEMENT IN LUMINAIRES AND OTHER LIGHTING SYSTEMS
First Claim
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1. A lighting system, comprising:
- a light source; and
a multilayer optical film disposed to reflect some light from the light source and to transmit other light from the light source, the multilayer optical film having a first internal Brewster angle associated with a first in-plane axis and a second internal Brewster angle associated with a second in-plane axis orthogonal to the first in-plane axis, the second internal Brewster angle being different from the first internal Brewster angle.
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Abstract
Multilayer optical films are disclosed that exhibit high reflectivity at normal incidence for all polarizations but preferentially transmit high angle rays in one or two orthogonal planes of incidence. Both symmetrical and asymmetrical constructions are disclosed. The films can be used in direct-lit backlights and in lighting systems other than direct-lit backlights, such as edge-lit backlights, and non-backlight lighting systems such as systems intended for general illumination without the need for any graphic component, such as luminaires and task lights.
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18 Claims
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1. A lighting system, comprising:
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a light source; and a multilayer optical film disposed to reflect some light from the light source and to transmit other light from the light source, the multilayer optical film having a first internal Brewster angle associated with a first in-plane axis and a second internal Brewster angle associated with a second in-plane axis orthogonal to the first in-plane axis, the second internal Brewster angle being different from the first internal Brewster angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A lighting system, comprising:
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a light source; and a multilayer optical film disposed to reflect some light from the light source and to transmit other light from the light source, the multilayer optical film having an internal Brewster angle associated with each of two orthogonal in-plane axes, at least one of the internal Brewster angles corresponding to an incidence angle in air of less than 90 degrees. - View Dependent Claims (17, 18)
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Specification