Performance testing of the High Altitude Observatory PDS microdensitometer.
Abstract
The High Altitude Observatory PDS microdensitometer, purchased in 1972, is one of the earlier machines produced. Particular features of this machine include: PDP-8 control, 12 bit A/D converter, high density log amplifier, updated locking microscope head, auto-loc, teflon drive screws and nuts, and high speed operation (up to 60 mm/sec). The microdensitometer is generally used with 10 or 50 micron apertures on 35 mm and 70 mm film. The HAO microdensitometer undergoes monthly testing to assure its consistent performance. These tests are designed to check positional and photometric stability at the 10 micron aperture level.
- Publication:
-
NASA Conference Publication
- Pub Date:
- 1984
- Bibcode:
- 1984NASCP2317...19P
- Keywords:
-
- Microdensitometers:Tests