 |
|
|
|
Research | Space Research | Northern lights - Auroral Cameras - All-sky cameras - New all-sky cameras
Technical description of the new all-sky imagers
The all-sky imagers that are used in the new Finnish all-sky cameras are manufactured by KeoConsultants. Each imager has telecentric and non-vignetting optics, and the field of view of the fish-eye lens is 180 degrees. The operation of the imager is controlled by the station computer of the all-sky camera station.
The filter wheel can accomodate seven narrow bandwidth interference filters. In normal operation one filter holder is left "free" to be able to acquire nonfiltered images. Every station has three filters: green, blue, and red.
The faint images are intensified before the final image is acquired by the CCD camera (B&W) and digitised by the frame grabber card of the station computer. This intensification allows shorter exposure times with less expensive CCD cameras, and typically an exposure takes 500ms.
More information:
, tel. +358 9 1929 4664
Back to top Home page
|
|
|
|