A photoelectric guide for sunspot images
Abstract
A photoelectric guide designed to directly handle sunspot images is described. A quadrant photodiode (serving as the photodetector) is placed in the beam reflected from the Dove prism face. The actuators are two plane-parallel plates attached to low-inertia electromagnetic drives, ensuring a high frequency (up to 3 Hz) of control action in response to image motion. The guide is placed in front of the spectrograph entrance slit and can be used with any standard AZU-5 telescope.
- Publication:
-
Issledovaniia Geomagnetizmu Aeronomii i Fizike Solntsa
- Pub Date:
- 1988
- Bibcode:
- 1988IGAFS..83..149D
- Keywords:
-
- Image Motion Compensation;
- Pointing Control Systems;
- Solar Position;
- Sunspots;
- Drives;
- Photoelectricity;
- Solar Limb;
- Telescopes