photochromic
Darkens in sunlight
Photochromic describes materials that change color in response to light, particularly ultraviolet radiation.
The most familiar application is photochromic lenses in eyeglasses, which darken in sunlight and clear indoors: My photochromic glasses take a few minutes to adjust when I go inside.
The effect is reversible and repeatable.
Faint color addition
- darkeningGrowing less bright
- fadingGradual loss of intensity
- activationSetting into operation
- transitionChange from one state
light-sensitive · adaptive · reversible · transmittance · absorption · clarity · automatic · speed
Movements between states
- glassesCorrective eyewear or tumblers
- lensesCurved transparent refractors
- spectaclesCorrective eyewear worn daily
- sunglassesTinted eye protection
prescription · bifocals · progressive · tinted · polarized · antiglare · corrective · optometry
Wavelengths shorter than violet
- sunlightRadiance from our star
- radiationEnergy propagation through space
- wavelengthSpatial repetition interval
- spectrumContinuous range of values
exposure · protection · filter · block · UVA · UVB · outdoor · brightness
Light-absorbing molecular regions
- isomerizationMolecular rearrangement keeping same atoms
- photochemistryStudy of radiation-induced reactions
- reversibilityCan be undone
- excitationStimulation of response
colorant · dye · compound · reaction · substrate · polymer · matrix
Applied surface layers
- polymersLarge chain-like molecules
- filmsProjected motion pictures
- glassTransparent solid from sand
- plasticCapable of being molded
polycarbonate · embedding · durability · formulation · manufacturing · lamination
tint
Faint color addition
- darkeningGrowing less bright
- fadingGradual loss of intensity
- activationSetting into operation
transition · light-sensitive · adaptive · reversible · transmittance · absorption · clarity · automatic · speed · recovery
transitions
Movements between states
- glassesCorrective eyewear or tumblers
- lensesCurved transparent refractors
- spectaclesCorrective eyewear worn daily
sunglasses · prescription · bifocals · progressive · tinted · polarized · antiglare · corrective · optometry · ophthalmology
ultraviolet
Wavelengths shorter than violet
- sunlightRadiance from our star
- radiationEnergy propagation through space
- wavelengthSpatial repetition interval
spectrum · exposure · protection · filter · block · UVA · UVB · outdoor · brightness · daylight
chromophores
Light-absorbing molecular regions
- isomerizationMolecular rearrangement keeping same atoms
- photochemistryStudy of radiation-induced reactions
- reversibilityCan be undone
excitation · colorant · dye · compound · reaction · substrate · polymer · matrix
windows
Glass-filled wall openings
- gogglesSealed protective eyewear
coatings
Applied surface layers
plastic · polycarbonate · embedding · durability · formulation · manufacturing · lamination
- eyeglass lensesbifocal, bifocals, progressive, progressive lenses, progressives
- color changerschameleon, mood ring, thermochromic, octopus, cuttlefish
- glass treatmentsfrosting, tinting, tempering, annealing, coating
- lens coatingsanti-reflective, hard coat, multilayer, scratch resistant, scratch-resistant
- smart materialspiezoelectric, electrochromic, thermochromic, smart glass, smart fabric
- eyewearglasses, sunglasses, eyeglasses, spectacles, shades
photochromicnon-reactive
Chemically inactive or stable
static · inert · unchanging · fixed · stable
photo, photographer, photography, photographic, monochrome, photographing, chromatic, photogenic, polychrome