Reduced glare neodymium oxide containing window glass

• US 6,416,867 B1
• Filed: 10/16/2000
• Issued: 07/09/2002
• Est. Priority Date: 10/16/2000
• Status: Expired due to Fees

• Current Assignee: Daniel Nathan Karpen
• Original Assignee: Daniel Nathan Karpen
• Inventors: Karpen, Daniel Nathan
• Primary Examiner(s): TURNER, ARCHENE A
• Application Number:
  US09/688,601
• Time in Patent Office: 631 Days
• Field of Search: 428/426, 501/64, 501/904, 501/905
• US Class Current: 428/426
• CPC Class Codes: C03C 3/095 containing rare earths
• CPC Class Codes: C03C 4/08 for glass selectively absorbing radiation of specified wave lengths
• CPC Class Codes: Y10S 501/903 having refractive index less than 1.8 and ABBE number less than 70
• CPC Class Codes: Y10S 501/904 Infrared transmitting or absorbing

Abstract

A reduced glare window glass, suitable for use in glass window, containing Neodymium Oxide, a rare earth compound. The Neodymium Oxide filters out the yellow light of the spectrum, thereby providing improved vision. Incorporation of yellow light in the light spectrum desaturates colors and reduces contrast. Improvement in contrast and a reduction in glare permits, for example, one to use this window glass in a building to reduce glare without the expense of blinds or curtains that are normally used to reduce glare. Additionally, the light transmittance is kept high, as high as 61.81 percent with a Neodymium Oxide doping of the glass in the amount of at least 0.0244 grams per square centimeter. This glass can be used for multiple layers of glass in assembled glazing.

Claims

1. A window glass for vision purposes which reduces glare, and a means for reducing the amount of transmitted yellow light in the range of 568 to 590 nanometers;

said means for reducing the amount of transmitted light comprising said window glass including glass material containing Neodymium Oxide greater than 0.0244 grams per square centimeter based on the total surface area of said window glass.

2. The window glass as in claim 1 wherein said window glass reduces the amount of transmitted yellow light at 582 nanometers by at least 95 percent.

3. Assembled glazing comprising multiple layers of glass wherein the minimum amount of Neodymium Oxide is 0.0244 grams per square centimeter of window area.

4. Assembled glazing comprising multiple layers of glass as in claim 3, wherein said assembled glazing reduces the amount of transmitted yellow light at 582 nanometers by at least 95 percent.

5. A window glass for vision purposes which reduces glare, and a means for reducing the amount of transmitted yellow light in the range of 568 to 590 nanometers;

said means for reducing the amount of transmitted light comprising said window glass including glass material containing Neodymium Oxide greater than 0.0244 grams per square centimeter based on the total surface area of said window glass, irrespective of the thickness of said window glass.

6. The window glass as in claim 5, wherein said window glass reduces the amount of transmitted yellow light at 582 nanometers by at least 95 percent.

7. Assembled glazing comprising multiple layers of glass wherein the minimum amount of Neodymium Oxide is 0.0244 grams per square centimeter of window area, irrespective of the combined thickness of said layers of window glass.

8. Assembled glazing comprising multiple layers of glass as in claim 7, wherein said assembled glazing reduces the amount of transmitted yellow light at 582 nanometers by at least 95 percent.