Polarized lens with oxide additive

• US 6,604,824 B2
• Filed: 12/03/2001
• Issued: 08/12/2003
• Est. Priority Date: 02/23/1998
• Status: Active Grant

• Current Assignee: Charles P. Larson
• Original Assignee: Charles P. Larson
• Inventors: Larson, Charles P.
• Primary Examiner(s): SCHWARTZ, JORDAN MARC
• Application Number:
  US10/005,679
• Publication Number:
  US 20020126256A1
• Time in Patent Office: 617 Days
• Field of Search: 351/159, 351/41, 351/44-46, 351/49, 351/160.R, 351/160.H, 351/163-166, 623/6.11, 623/6.17, 623/6.56, 623/6.62
• US Class Current: 351/159
• CPC Class Codes: G02C 7/108 Colouring materials
• CPC Class Codes: G02C 7/12 Polarisers

Abstract

A lens for reducing glare and improving color discrimination includes a lens wafer containing a rare earth oxide such as neodymium that provides progressively higher transmittance at 540 nm than at 500 nm and at 450 nm, and average transmittance at 540 and 610 nm that is greater than the transmittance at 580 nm. A ultra-violet absorber, a polarized filter and anti-reflective layer may be included to reduce UV light, glare and improve contrast and vision.

Claims

1. A multi-layer lens for eyeglasses comprising:

a lens wafer system comprising at least a first lens wafer and a second lens wafer;

a polarizing layer between the first and second lens wafer; and

an ultraviolet light absorbing component present in the lens wafer system;

wherein said lens wafer system comprises from about 1% to about 1.8% by mole neodymium and being adapted to impart light transmittance characteristics to the lens such that the lens will exhibit a light transmittance at 500 nm that is greater then its transmittance at 450 nm, a light transmittance at 540 nm that is greater than the transmittance at 500 nm, and an average light transmittance at 540 nm and 610 nm that is greater than a light transmittance at 580 nm,

said lens being farther characterized by having all spectral points having a transmittance of about 20% or more between 500 nm and 650 nm as defined by ANSI Standard Z803-1996 Section 4.6.3.3.

2. A lens according to claim 1 wherein said lens wafer system comprises from about 1% to about 1.6% by mole neodymium.

3. A lens according to claim 1 wherein said lens wafer system comprises from about 1.4% to 1.5% by mole neodymium.

4. A lens according to claim 1 wherein said lens comprises a hydrophobic coating applied to at least one surface of at least one lens wafer.

5. A lens according to claim 1 wherein said neodymium is present in only the first lens wafer.

6. A lens according to claim 2 wherein said neodymium is present in only the first lens wafer.

7. A lens according to claim 1 wherein said lens comprises an anti-reflective coating applied to at least one outer surface of a lens wafer, and a hydrophobic coating applied to the anti-reflective coating.

8. A lens according to claim 1 wherein said lens comprises anti-reflective coatings applies to the outer surfaces of at least two of the lens wafers.

9. A lens according to claim 8 wherein said lens comprises a hydrophobic coating applied to at least one of the anti-reflective coatings present on the lens wafers.

10. A lens according to claim 1 wherein said polarizing layer has a luminous transmission of from about 15% to about 50%.

11. A multi-layer lens for eyeglasses comprising:

a lens wafer system comprising at least a first lens wafer and a second lens wafer;

a polarizing layer between the first and second lens wafer;

an ultraviolet light absorbing component present in the lens wafer system; and

an anti-reflective layer adjacent to an outer surface of at least one of the lens wafers,

wherein said lens wafer system comprises from about 1% to about 1.8% by mole neodymium and being adapted to impart light transmittance characteristics to the lens such that the lens will exhibit a light transmittance at 500 nm that is greater that its transmittance at 450 nm, a light transmittance at 540 nm that is greater than the transmittance at 500 nm, and an average light transmittance at 540 nm and 610 nm that is greater than a light transmittance at 580 nm,

said lens being further characterized by having all spectral points having a transmittance of about 20% or more between 500 nm and 650 nm as defined by ANSI Standard Z803-1996 Section 4.6.3.3.

12. A lens according to claim 11 wherein said lens wafer system comprises from about 1% to about 1.6% by mole neodymium.

13. A lens according to claim 12 wherein said lens wafer system comprises from about 1.4% to about 1.5% by mole neodymium.

14. A lens according to claim 11 wherein said neodymium is present in only the first lens wafer.

15. A lens according to claim 12 wherein said neodymium is present in only the first lens wafer.

16. A lens according to claim 11 wherein said lens comprises a hydrophobic coating applied to at least one surface of at least one lens wafer.

17. A lens according to claim 11 wherein said lens comprises a hydrophobic coating applied to the anti-reflective coating.

18. A lens according to claim 11 wherein said lens comprises anti-reflective coatings applies to the outer surfaces of at least two of the lens wafers.

19. A lens according to claim 18 wherein said lens comprises a hydrophobic coating applied to the anti-reflective coatings present on the lens wafers.

20. A lens according to claim 11 wherein said polarizing layer has a luminous transmission of from about 15% to about 50%.