Gradient-Index (GRIN) Lenses by Slurry-Based Three-Dimensional Printing (S-3DP)

Abstract

The BaO-SiO2 material system, which has a 2.4 stronger index changing ability than the Al2O3-SiO2 material system, was developed. Barium acetate was used as the dopant source. The pre-sintering treatment was found to be 900 degrees C for 18 hours in air to convert barium acetate to barium oxide. The sintering condition was found to be 1725 degrees C for 10 minutes in vacuum. A barium oxide-doped GRIN lens with radial parabolic index variation was fabricated. Its effective focal length was measured to be 14.63cm in the x direction and 11.14cm in the y direction. The barium oxide concentration profiles were measured. The theoretical focal lengths were calculated and compared with the effective focal lengths.

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Document Details

Document Type
Technical Report
Publication Date
Nov 16, 2004
Accession Number
ADA429993

Entities

People

  • Michael J Cima

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Barium
  • Barium Oxides
  • Body Weight
  • Chemical Composition
  • Elements
  • Equations
  • Gradient-Index Lenses
  • Heat Treatment
  • Liquids
  • Materials
  • Metal Oxides
  • Metals
  • Oxides
  • Phase Diagrams
  • Phase Transformations
  • Refractive Index
  • Sintering

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Nanofabrication and Microfabrication.