Photochromic ophthalmic lens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 18, 2017
Issued Date -
N/A
app pub date -
Oct 10, 2013
filing date -
Oct 11, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A photochromic ophthalmic lens includes a photochromic substrate and a filter having at least one layer formed on the main front face of the lens. The filter has a total thickness ≦700 nm and the front face has: an average UVA reflection factor over a range of wavelengths from 330 to 380 nanometers that is ≦40%, for an incident angle between 0° and 15°, an average blue reflection factor over a range of wavelengths from 420 to 450 nanometers that is ≧5%, for an incident angle between 0° and 15°, a spectral reflectivity curve for an incident angle between 0° and 15°, the reflectivity curve having a reflectivity maximum at a wavelength <435 nanometers, and a width at mid-height ≧70 nanometers, and for an incident angle between 0° and 15°, Δspectral=1−[R0°-15° (480 nm)/R0°-15° (435 nm)], with Δspectral≧0.8.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully