Related Experiment Video
Updated: Mar 17, 2026
10:35
Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
20.2K
Reflective Schmidt-Cassegrain system for large-aperture telescopes
Applied Optics
|July 14, 2016
Summary
A new reflective optical system was developed for ultraviolet and soft x-ray imaging. This modified Schmidt-Cassegrain design offers a wide field of view and corrects aberrations for enhanced hyperspectral instrument performance.
Area of Science:
- Optics
- Astronomy
- Instrumentation
Background:
- The Schmidt-Cassegrain system is a widely used catadioptric telescope.
- Limitations exist in its field of view and aberration correction for certain applications.
Purpose of the Study:
- To develop and test a modified reflective optical system.
- To evaluate its suitability for ultraviolet (UV) and soft x-ray applications.
- To enhance performance for hyperspectral instruments.
Main Methods:
- A reflective modification of the Schmidt-Cassegrain system was designed and constructed.
- The system incorporates a planoid mirror with an aspheric profile and spherical primary/secondary mirrors.
- Performance was evaluated based on key optical parameters.
Main Results:
- The system compensates for spherical aberration and astigmatism over a wide field of view (±1.5°).
- Achieved angular resolution is better than 3 arcseconds.
- Features a flat image field (30.4 mm diameter) and no chromatic aberrations.
- Demonstrated suitability for UV and soft x-ray ranges.
Conclusions:
- The modified optical system is highly effective for UV and soft x-ray applications.
- Its wide field of view and aberration correction make it ideal for hyperspectral imaging.
- The design expands the operating range for advanced optical instruments.
