Ultraviolet radiation and blue light blocking polarizing lens

  • US 5,400,175 A
  • Filed: 08/24/1992
  • Issued: 03/21/1995
  • Est. Priority Date: 02/26/1987
  • Status: Expired due to Fees
First Claim
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1. An optical transparency adapted to block from incidence at a human eye selected wavelengths of light in a sunlit environment that are harmful to the eye and to transmit to the eye selected wavelengths of visible light that maintain color verity and allow for high visual acuity, comprising:

  • a substantially transparent laminate having a light polarizing material; and

    a sharp cut-on filter associated with the laminate and adapted to substantially block wavelengths of non-polarized light between 300 nm and about 450 nm and to commence sharply cutting on transmission of light at a sharp cut-on wavelength of between 450 nm and 550 nm and being characterized by a spectral transmission curve, a portion of whose slope at wavelengths of light greater than the cut-on wavelength but less than 650 nm rises more than 0.5 percent change in light transmission for every one nanometer of increasing wavelength change.

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