Abstract
An optical test has been devised to test and qualify null correctors that are used for measuring highly aspheric primary mirrors. The technique employs a rotationally symmetric computer-generated hologram (CGH) that tests the null corrector directly by synthesizing a wavefront that would be returned by a perfect primary mirror. A description of the test and summary of the error analysis are given. The error analysis includes hologram errors from pattern distortion, substrate flatness, and etch depth variations. It also includes the effects of errors in the wavelength and data analysis errors. This resulting analysis shows ±78 ppm accuracy for measuring the conic constant of null correctors built for measuring 3.5-m f/1.75 primary mirrors.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 86-97 |
| Number of pages | 12 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 1993 |
| DOIs | |
| State | Published - Dec 7 1993 |
| Event | Quality and Reliability for Optical Systems 1993 - San Diego, United States Duration: Jul 11 1993 → Jul 16 1993 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering