Laser-protection variable transmission optical device

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 the first peak absorption wavelength is substantially the same as the second peak absorption wavelength.