Light Diffusers for Backlit Displays
US-2018059482-A1 · Mar 1, 2018 · US
Optical camouflage filter
US11360248B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11360248-B2 |
| Application number | US-201816630534-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 25, 2018 |
| Priority date | Jul 26, 2017 |
| Publication date | Jun 14, 2022 |
| Grant date | Jun 14, 2022 |
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- Title
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Abstract
Official abstract text for this publication.
Systems including one or both of a light emitter or a light receiver and an optical filter adjacent one or both of the light emitter or the light receive are described. The optical filter includes a wavelength selective scattering layer that scatters near-infrared light less than visible light. The wavelength selective scattering layer includes a plurality of particles. The plurality of particles have an imaginary refractive index less than 10.
First claim
Opening claim text (preview).
The invention claimed is: 1. A system comprising: one or both of a light emitter or a light receiver; and an optical filter adjacent one or both of the light emitter or the light receiver, wherein the optical filter comprises a wavelength selective scattering layer, wherein the wavelength selective scattering layer comprises a plurality of particles, wherein the wavelength selective scattering layer has a near-infrared scattering ratio of less than about 0.9, the near-infrared scattering ratio being a ratio of an average near-infrared scattering to an average visible haze, wherein the wavelength selective scattering layer has a visible reflective haze ratio of greater than about 0.1, the visible reflective haze ratio being a ratio of an average visible diffusive reflectance to an average visible total reflectance, and wherein the plurality of particles have an imaginary refractive index less than 10. 2. The system of claim 1 , wherein the plurality of particles have an imaginary refractive index between 10 and 10 −1 . 3. The system of claim 1 , wherein the plurality of particles include TiO 2 , inorganic pigments, or organic pigments. 4. The system of claim 1 , wherein the wavelength selective scattering layer comprises a printable ink. 5. The system of claim 1 , wherein the wavelength selective scattering layer comprises dye. 6. An article comprising: An optical filter, wherein the optical filter comprises a wavelength selective scattering layer, wherein the wavelength selective scattering layer comprises a plurality of particles, wherein the wavelength selective scattering layer has a near-infrared scattering ratio of less than about 0.9, the near-infrared scattering ratio being a ratio of an average near-infrared scattering to an average visible haze, wherein the wavelength selective scattering layer has a visible reflective haze ratio of greater than about 0.1, the visible reflective haze ratio being a ratio of an average visible diffusive reflectance to an average visible total reflectance, wherein the plurality of particles have an imaginary refractive index less than 10. 7. The article of claim 6 , wherein the plurality of particles have an imaginary refractive index between 10 and 10 −1 . 8. The article of claim 6 , wherein the plurality of particles include TiO 2 , inorganic pigments, or organic pigments. 9. The article of claim 6 , wherein the scattering layer comprises a printable ink. 10. The article of claim 6 , wherein the scattering layer comprises dye.
Assignees
Inventors
Classifications
- G02B5/0242Primary
by means of dispersed particles · CPC title
the diffusion taking place within the volume of the element · CPC title
Reflecting filters (G02B5/28 takes precedence) · CPC title
adapted to provide an additional optical effect, e.g. anti-reflection or filter · CPC title
- G02B5/208Primary
for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title
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Frequently asked questions
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- What does patent US11360248B2 cover?
- Systems including one or both of a light emitter or a light receiver and an optical filter adjacent one or both of the light emitter or the light receive are described. The optical filter includes a wavelength selective scattering layer that scatters near-infrared light less than visible light. The wavelength selective scattering layer includes a plurality of particles. The plurality of particl…
- Who is the assignee on this patent?
- 3M Innovative Properties Co
- What technology area does this patent fall under?
- Primary CPC classification G02B5/0242. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jun 14 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).