Diagnosing a PDS microdensitometer
Abstract
A number of diagnostic tests are developed for the Photometric Data System PDS 2020G microdensitometer to monitor its performance and to isolate various electromechanical problems. A number of tests which help to diagnose problems with the photometer, positional accuracy and data collection are described. The tests include: (1) scanning a razor blade edge to study the response of the photometer and zero point losses in the coordinate system, (2) scanning a long straight line to evaluate the drunkness of the stage motions, (3) scanning photometric step wedge calibrations to study the response of the photometer, and (4) measurement of a series of high signal to noise plates of the same region of the sky to evaluate the overall performance of the microdensitometer. A variety of electronic tests to isolate electromechanical problems are also performed.
- Publication:
-
Astronomical Microdensitometry Conference
- Pub Date:
- July 1984
- Bibcode:
- 1984asmd.conf....3V
- Keywords:
-
- Astronomical Photometry;
- Electromechanics;
- Microdensitometers;
- Optical Measurement;
- Performance Tests;
- Position (Location);
- Calibrating;
- Coordinates;
- Data Acquisition;
- Data Processing;
- Noise Measurement;
- Scanning;
- Signal To Noise Ratios;
- Instrumentation and Photography