Specialty Absorptive Lenses

EnChroma

• color enhancing lens for color defectives

• removes wavelengths of light where overlap between red and green is occurring, amplifying the color signal sent to the brain

polarizers, color filters

what 2 things do most passive viewing 3D glasses use?

no

can the viewer tilt their head when wearing linearly polarized 3D glasses?

yes

can the viewer tilt their head when wearing circularly polarized 3D glasses?

amethyst contrast enhancer (ACE)

• selectively transmits blue, green, & red regions of visible spectrum

• increase readability of color display screens when surrounding light is high

• block yellow flare sodium so can be used for glassblowing

rose didymium filter

• used in glassblowing

• appears to be a different color under different light

  • rose under incandescent light

  • blue under fluorescent light

• not an IR absorber

x-ray shielding leaded glass lenses

• lenses made of leaded glass material like lead crystal

• sold as plano protectors & sometimes Rxed

49% absorption orange glasses

block UV light & short wavelength visible light, very helpful in dentistry for dental bonding w/ the use of blue light to harden resins

optical density

laser protective eyewear is specified in terms of ______

0

laser protective eyewear wants to have a transmission of ____

5

an optical density of _____ is the same as a transmission of 0.001%

IR radiation

glass blower’s cataract is believed to be caused by _______