Gradient Index Lenses from Sol-Gel Layering
Abstract
The research proposed here is based on the principle of the density gradient column. A liquid (A) of low density is continuously mixed into a liquid (B) of higher density while B is allowed to flow slowly down the wall of a glass cylinder. The feed rate of A is equal to the flow rate of mixture. Thus, a gradient density column is formed. Such columns have been used to measure the density of semiconductors to five (5) significant figures. The gradient is stable for many months at room temperature. We proposed to use this method to prepare gradient index (GRIN) lenses from gels with large axial gradients. The chemical compositions of two sols are selected based on considerations of solubility between the sols; differences in refractive index, density, expansion coefficient and densification temperatures between resulting oxides.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1994
- Accession Number
- ADA285649
Entities
People
- John Douglas MacKenzie
Organizations
- University of California, Los Angeles