NEW GRADIENT INDEX OPTICAL GLASSES FOR OPTOELECTRONIC SYSTEMS

Award Information
Agency: National Science Foundation
Branch: N/A
Contract: N/A
Agency Tracking Number: 21692
Amount: $49,979.00
Phase: Phase I
Program: SBIR
Awards Year: 1993
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Gradient Lens Corp.
207 Tremont St, Rochester, NY, 14608
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Douglas S Kindred
 (716) 235-2620
Business Contact
Phone: () -
Research Institution
N/A
Abstract
RADIAL GRADIENT INDEX (GRIN) LENSES HAVE A REFRACTIVE INDEX PROFILE WHICH VARIES RADIALLY OUTWARD FROM THE OPTICAL AXIS. HIGH NUMERICAL APERTURE GRIN LENSES USE GLASSES CONTAINING THALLIUM OXIDE. THE REFRACTIVE INDEX GRADIENT IS PRODUCED BY ION EXCHANGE OF POTASSIUM, K +, FROM A MOLTEN SALT BATH, FOR THALLIJM, TI +, IN THE GLASS. THALLIUM IS HIGHLY TOXIC, MAKING ITS USE PROHIBITIVE IN A MANUFACTURING ENVIRONMENT IN THE UNITED STATES. OF THE SINGLE VALENT IONS, ONLY SILVER AND THALLIUM PROVIDE A LARGE ENOUGH INDEX CHANGE TO PRODUCE HIGH NUMERICAL APERTURE GRIN LENSES WHEN EXCHANGED WITH ALKALI IONS. GRADIENT LENS CORP, IS USING A SILVER CONTAINING GLASS AND EXCHANGE OF SODIUM FOR SILVER TO PRODUCE THE GRADIENT. THIS WORK ADDRESSES THE PROBLEM OF OPTIMIZING THE COMPOSITION OF A SILVER CONTAINING GLASS FOR ION EXCHANGE. THE GLASS MUST HAVE RELATIVELY HIGH IONIC MOBILITY, BE CHEMICALLY RESISTANT TO THE SALT BATH, AND PRODUCE A GOOD REFRACTIVE INDEX PROFILE TO PROVIDE HIGH QUALITY IMAGING. A SERIES OF SILVER CONTAINING GLASSES IS BEING MELTED AND THEIR CONDUCTIVITY AND CHEMICAL RESISTANCE MEASURED. ION EXCHANGE EXPERIMENTS WILLBE PERFORMED IN THE SUCCESSFUL CANDIDATE GLASSES AND THE REFRACTIVE INDEX PROFILE WILL BE MEASURED AND ANALYZED.

* information listed above is at the time of submission.

Agency Micro-sites

US Flag An Official Website of the United States Government