Focal properties of geodesic waveguide lenses
Abstract
The focal properties of uncorrected geodesic lenses in ion-exchanged glass waveguides are reported. A 13.8-mm-focal-length lens resolved by beams with an angular separation of 27.6 mrad, while a 28-mm-focal-length lens resolved beams with an angular separation of only 3.3 mrad. Intensity profiles of the focal region of the former lens revealed a 40-μ spot size when the input aperture was 5 mm, and a spot size of 7.7 μ when the aperture was reduced to 1 mm. This value is close to the diffraction-limited spot size of 5.7 μ.
- Publication:
-
Applied Physics Letters
- Pub Date:
- May 1976
- DOI:
- 10.1063/1.88838
- Bibcode:
- 1976ApPhL..28..514V
- Keywords:
-
- Focusing;
- Geodesic Lines;
- Lens Design;
- Optical Waveguides;
- Angular Distribution;
- Glass;
- Ion Exchanging;
- Light Beams;
- Luminous Intensity;
- Optical Data Processing;
- Optics;
- 42.82.+n;
- 42.78.Fi;
- 42.78.Cf