US 12,222,623 B2
Laser-protection variable transmission optical device
Bahman Taheri, Shaker Heights, OH (US); Ludmila Sukhomlinova, Kent, OH (US); Antonio Munoz, Shaker Heights, OH (US); and Joseph Angelo, Kent, OH (US)
Assigned to ALPHAMICRON INCORPORATED, Kent, OH (US)
Filed by ALPHAMICRON INCORPORATED, Kent, OH (US)
Filed on Nov. 9, 2023, as Appl. No. 18/505,144.
Application 18/505,144 is a continuation in part of application No. 18/369,843, filed on Sep. 19, 2023.
Application 18/369,843 is a continuation in part of application No. PCT/US2022/044310, filed on Sep. 22, 2022.
Claims priority of provisional application 63/246,940, filed on Sep. 22, 2021.
Prior Publication US 2024/0077777 A1, Mar. 7, 2024
Int. Cl. G02F 1/137 (2006.01); G02F 1/1347 (2006.01)
CPC G02F 1/137 (2013.01) [G02F 1/1347 (2013.01)] 34 Claims
OG exemplary drawing
 
1. A laser protection variable transmission optical device (“LP-VTOD”) comprising:
a first cell comprising a first electro-optic material provided between a first pair of substrates, wherein the first electro-optic material is capable of changing from a state of higher light transmittance to a state of lower light transmittance in a first wavelength region upon a change in a first electric field applied across the first electro-optical material, and wherein the first cell is characterized by a narrow band absorption having a first peak absorption wavelength and a first FWHM of 175 nm or less; and
a second cell in optical communication with the first cell, the second cell comprising a second electro-optic material provided between a second pair of substrates, wherein the second electro-optic material is capable of changing from a state of higher light transmittance to a state of lower light transmittance in a second wavelength region upon a change in a second electric field applied across the second electro-optical material, and wherein the second cell is characterized by a narrow band absorption having a second peak absorption wavelength and a second FWHM of 175 nm or less,
wherein the LP-VTOD is capable of switching from a clear state to a darkened state having a darkened state transmittance % TDS-P that is equal to or less than 10% for at least one of the first or second peak absorption wavelengths,
and wherein both the first and second peak absorption wavelengths are in a range of 380-780 nm.