[Last Change: 01 Mar 2011 (rev 2)]
Focus Position
Status
The most recent plate focus tests indicate that the position of best-focus has not changed due to out-gassing of the optical bench. The nominal focus positions below (in motor steps) are taken from the Off-line Database (ODB).
| Detector | Nominal Focus | Nominal Focus | Nominal Focus | Date Updated |
|---|---|---|---|---|
| (motor steps from mechanism's zero point) | (mm from zero point) | (mm from launch-lock position) | ||
| ACIS-I | -536 | -0.782 | -1.038 | 8/25/99 |
| ACIS-S | -468 | -0.684 | -0.940 | 8/21/99 |
| HRC-I | -716 | -1.040 | -1.296 | 9/6/99 |
| HRC-S | -991 | -1.430 | -1.685 | 10/1/99 |
Analysis:
- The latest ACIS-S plate focus analysis yielded a best-focus of -486 motor steps, showing that the focus position has remained stable (within the errors) since launch.
