Granted Patent
B2
US 12,415,408 · App. 19/169,590 · Granted Sep 16, 2025
Protective barrier for safety glazing
Inventors:
Bart E. Wilson (Las Vegas, NV); Stephen S. Wilson (Las Vegas, NV); Seth Wilson (Las Vegas, NV)
Assignee:
RO TECHNOLOGIES, LLC
F24F1/0093B32B7/12B32B27/08B32B27/36B32B37/182B60J1/02F24F11/30F24F11/52F24F11/86G02B1/14B32B2605/006F24F2110/12
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Abstract
A protective barrier affixable to a curved substrate comprises a stack of two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film, a hard coat on a first side of the PET film, and an adhesive layer on a second side of the PET film opposite the first side. The stack of two or more lenses may have a modulation transfer function that exhibits a contrast value greater than 75% for a spatial resolution of one line-pair per 0.0003 radians at 65 degrees angle of incidence. Heat and pressure may be applied to conform the stack of two or more lenses to the shape of the curved substrate.
Claims (23)
1. A protective barrier affixable to a curved substrate, the protective barrier comprising a stack of two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film and a hard coat on a first side of the PET film, the stack of two or more lenses having a modulation transfer function that exhibits a contrast value greater than 90% for a spatial resolution of one line-pair per 0.0003 radians at 45 degrees angle of incidence.
2. The protective barrier of claim 1 , wherein each of the two or more lenses further includes an adhesive layer on a second side of the PET film opposite the first side.
3. The protective barrier of claim 2 , wherein the adhesive layer of each of the two or more lenses includes UV stabilizers.
4. The protective barrier of claim 1 , wherein the modulation transfer function of the stack of two or more lenses exhibits a contrast value greater than 80% for a spatial resolution of one line-pair per 0.0003 radians at 60 degrees angle of incidence.
5. The protective barrier of claim 1 , wherein the modulation transfer function of the stack of two or more lenses exhibits a contrast value greater than 85% for a spatial resolution of one line-pair per 0.0003 radians at 55 degrees angle of incidence.
6. The protective barrier of claim 1 , wherein the PET film of each of the two or more lenses has a modulation transfer function that exhibits a contrast value greater than 70% for a spatial resolution of one line-pair per 0.0003 radians at 70 degrees angle of incidence.
7. The protective barrier of claim 1 , wherein each of the two or more lenses is 2-4 mil thick.
8. The protective barrier of claim 1 , wherein the PET film of each of the two or more lenses includes UV stabilizers.
9. The protective barrier of claim 1 , wherein the hard coat includes UV stabilizers.
10. The protective barrier of claim 1 , wherein the PET film of each of the two or more lenses has a machine direction shrinkage of 0.6%-1.8% and a transverse direction shrinkage of 0.3%-1.1% at 150° C.
11. A method comprising:
stacking two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film and a hard coat on a first side of the PET film, the stack of two or more lenses having a modulation transfer function that exhibits a contrast value greater than 90% for a spatial resolution of one line-pair per 0.0003 radians at 45 degrees angle of incidence;
placing the stack of two more lenses on a curved substrate to contact with the curved substrate; and
applying heat and pressure to conform the stack of two or more lenses to the shape of the curved substrate.
12. The method of claim 11 , wherein each of the two or more lenses further includes an adhesive layer on a second side of the PET film opposite the first side.
13. The method of claim 12 , wherein the adhesive layer of each of the two or more lenses includes UV stabilizers.
14. The method of claim 12 , wherein said applying heat and pressure is performed at least in part prior to the adhesive layer of each of the two or more lenses being fully cured.
15. The method of claim 11 , further comprising peeling off an outermost lens of the stack of two or more lenses after said applying heat and pressure.
16. The method of claim 11 , wherein the PET film of each of the two or more lenses has a modulation transfer function that exhibits a contrast value greater than 80% for a spatial resolution of one line-pair per 0.0003 radians at 60 degrees angle of incidence.
17. The method of claim 11 , wherein each of the two or more lenses is 2-4 mil thick.
18. The method of claim 11 , wherein the PET film of each of the two or more lenses includes UV stabilizers.
19. The method of claim 11 , wherein the hard coat of each of the two or more lenses includes UV stabilizers.
20. The method of claim 11 , wherein the PET film of each of the two or more lenses has a machine direction shrinkage of 0.6%-1.8% and a transverse direction shrinkage of 0.3%-1.1% at 150° C.
Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Jun 11, 2025
From: WILSON, BART E.; WILSON, STEPHEN S.; WILSON, SETH
To: RACING OPTICS, INC.
Reel/Frame 071386/0952 →
CHANGE OF NAME
Recorded Jun 11, 2025
From: RACING OPTICS, INC.
To: RACING OPTICS LLC
Reel/Frame 071387/0078 →
NUNC PRO TUNC ASSIGNMENT
Recorded Jun 11, 2025
From: 100 MILE ROAD, INC.
To: RO TECHNOLOGIES, LLC
Reel/Frame 071387/0382 →
NUNC PRO TUNC ASSIGNMENT
Recorded Jun 11, 2025
From: RACING OPTICS LLC
To: 100 MILE ROAD, INC.
Reel/Frame 071544/0029 →
Continuity (6)
Provisional Application
62987726
· Mar 10, 2020
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