Telescope
105cm Schmidt Telescope
In 1930, Schmidt (Germany) designed new type telescope. They are called Schmidt telescopes. The Schmidt telescope is composed of corrector lens and spherical mirror. The corrector lens is located on the top of telescope and spherical mirror is put on the bottom of one. They enable to be obtained very very wide images without aberrations.
A Schmidt telescope at the Kiso Observatory have a 105cm corrector lens and 150cm spherical mirror. Its field of view is 6 arcdeg * 6 arcdeg on the 36cm * 36cm photographic plate. This area corresponds to the 180 full moon.
In addition to photographic plate, you can use CCD camera or near-infrared camera. You can also carry out spectroscopic observation with objective prism. A computer is used to effectively and safely control the Schmidt telescope. Through the computer we can point to targets, open or close shutter, adjust focus point, control a dome, and track targets. Only to do is putting the coordinate date of targets into the computer to point and track the targets and to control the dome automatically.
Specifications of 105 cm Schmidt Telescope
[Location]
| 137d37m31.5s [E] (=9h10m30.1s) |
| 35d47m50.0s [N] |
| Altitude: 1132m |
[Optics]
| Corrector Plate |
Main Mirror |
Secondary Mirror | |
|---|---|---|---|
| Aperture | 105 cm | 150 cm | 17.5 cm |
| Thickness (center) | 2 cm | 24 cm | 3 cm |
| Focal length | ----- | 330 cm | -58 cm |
| Material | UBK7 | CER-VIT | Low-expansion glass |
| Weight | 48 kg | 1350 kg | 1.7 |
| Schmidt System |
Cassegrain System | |
|---|---|---|
| Focal length | 330 cm | 2376cm |
| Focal ratio | 3.1 | 22.6 |
| Field of View | 6 deg * 6 deg | 10 * 10 arcmin^2 |
[Objective Prism]
| Objective Prism 1 | Objective Prism 2 | |
|---|---|---|
| Vertex angle | 2 deg | 4 deg |
| Aperture | 105 cm | 105 cm |
| Thickness | 30-70 mm | 31-108 mm |
| Dispersion at H_gamma/A band |
800/3800 Angstrom/mm | 170/1000 Angstrom/mm |
| Material | BK7 | F2 |
| Weight | 121 kg | 245 kg |
Schmidt Telescope Control Software
Instead of previous control system with PC, it is aveilable to control the Schmidt Telescope with GUI on the work stations. We can obtain status of the detectors attached to the telescope through thie system.
Schmidt Telescope Operation Manual (Japanese)
30cm Telescope (K.3T = Kiso 0.3 m Telescope)
