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An Optical Design of Off-axis Four-mirror-anastigmatic Telescope for Remote Sensing
- Source :
- Journal of the Optical Society of Korea. 16:243-246
- Publication Year :
- 2012
- Publisher :
- Korean Journal of Optics and Photonics, 2012.
-
Abstract
- An off-axis four-mirror-anastigmatic telescope is presented here which is composed of two aspheric surfaces and two spherical surfaces. The entrance pupil diameter is 290 mm and the stop is located at the primary mirror. The effective focal length is 900 mm. The strip field of view for the telescope is 15° × 0.2° and if the telescope is launched into an orbit about 400 km altitude, the observed range width will be more than 105 km within a scene without any other auxiliary scanning instrument. The spectral range can be as wide as from visual wave band to infrared wave band in the mirror system. This telescope can be used for environmental monitoring with different detectors whose pixel is adapted to the optical resolution. In this paper, the spectral range is chosen as 3.0 -5.0 μm, and center distance of the pixel is 30 μm. And the image quality is near the diffraction limit.
- Subjects :
- Physics
Reflecting telescope
business.industry
Astrophysics::Instrumentation and Methods for Astrophysics
Cassegrain reflector
X-ray telescope
Field of view
Atomic and Molecular Physics, and Optics
law.invention
Entrance pupil
Telescope
Primary mirror
Optics
law
Focal length
business
Remote sensing
Subjects
Details
- ISSN :
- 12264776
- Volume :
- 16
- Database :
- OpenAIRE
- Journal :
- Journal of the Optical Society of Korea
- Accession number :
- edsair.doi...........14f744c26eb6b92fd1f18e21ea1b8de9