Light redirecting structure
First Claim
1. A light redirecting film or sheet comprising:
- a) a front surface having a plurality of spaced apart grooves to provide for total internal reflection of incident light,b) a rear surface opposite the front surface,c) a plurality of uniformly spaced apart regions for absorbing a portion of light capable of being re-directed by total internal reflection at the front surface,d) wherein the uniformly spaced apart regions are opaque elements and provide an overall internal attenuation of incident light of about 10% to about 40%.
1 Assignment
0 Petitions
Accused Products
Abstract
A generally plano rectangular louvers are capable of being ganged in a stacked tiltable array to enhance light re-direction when titled to follow the solar elevation. Combinations of features and optical characteristic avoid optical artifacts and enhance efficiency of light utilization and manufacturing. Different louvers can be combined in alternative ways in such arrays. Light directly louvers, films, sheets and panels deploy a grooves that re-direct exterior sunlight for deeper penetration into rooms and building interiors. Absorbing structure are combined with films or panel that while reducing total interior illumination, reduce the potential for annoying glare at low solar elevations.
9 Citations
26 Claims
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1. A light redirecting film or sheet comprising:
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a) a front surface having a plurality of spaced apart grooves to provide for total internal reflection of incident light, b) a rear surface opposite the front surface, c) a plurality of uniformly spaced apart regions for absorbing a portion of light capable of being re-directed by total internal reflection at the front surface, d) wherein the uniformly spaced apart regions are opaque elements and provide an overall internal attenuation of incident light of about 10% to about 40%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A window comprising:
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a) a planar transparent glazing panel having a front surface and a rear surface disposed opposite the front surface, b) a light redirecting film or sheet having; i) a first surface having a plurality of spaced apart grooves to provide for total internal reflection of incident light, ii) a second surface opposite the first surface, iii) a plurality of uniformly spaced apart regions for absorbing a portion of light incident on the front surface of the glazing panel before exiting the second surface of the light redirecting film or sheet, iv) wherein the light redirecting film or sheet is attached in a planar lamination with the planar transparent glazing panel and the uniformly spaced apart regions are opaque and provide an internal attenuation of incident light of about 10% to about 40%. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification