Out-of-focus intensity distribution: Effects of focal number and aberration
Abstract
Modification of the incident laser energy distribution by working out of the focal plane is investigated. The intensity distributions for two focal lengths (78 and 132 cm) and various measured optical distortions (phase only) for the focusing optics are analyzed using a fast Fourier method. A 78 cm element produced more uniform spots of diameter 500 microns. The 132 cm element was less sensitive to focusing/positioning error than the 78 cm element.
- Publication:
-
Presented at Conf. on Optics
- Pub Date:
- 1981
- Bibcode:
- 1981opti.confR....K
- Keywords:
-
- Aberration;
- Carbon Dioxide Lasers;
- Energy Distribution;
- Foci;
- Laser Outputs;
- Diffraction;
- Distortion;
- Fast Fourier Transformations;
- Focal Plane Devices;
- Focusing;
- Instrumentation and Photography