Search

We reported line–plane-switching infrared (IR) fiber bundle with high-resolution of 0.027 μm − 1 , small numerical aperture ( NA ) of 0.20 (±0.02), high filling-factor, and bending radius of around 5.0 mm, i.e. extremely good flexibility. This fiber bundle is made from chalcogenide glass fibers, possessing core (As 40 S 58 Se 2 ) of 45 μm, cladding (As 40 S 60 ) of 50 μm, and error of 1% in diameter. Based on the lens used to demonstrate IR push-broom imaging, the format of matching fiber bundle we chose is 64 × 9 in system to implement 192 × 3 format linear array imaging. By principle-demonstrating system incorporated this fiber bundle coupled with small scale Infrared Focal Plane Array (IRFPA), wide-field and long-array IR push-broom image was successfully demonstrated. [ABSTRACT FROM AUTHOR]

The parabolic primary mirror (PM) of space solar telescope is sensitive to the serious external loads and surface variation of PM has large influence on the optical performance of the telescope. To evaluate the PM change under the external loads accurately, the high-precision algorithm based on the comprehensive surface parameter is presented. The discrete error of finite element discretization of optical surface is concerned for the first time and the elimination of discrete error is discussed as well. The calculation method of surface parameter including rigid body displacement, surface focus and root mean square is researched. Based on the high-precision algorithm, the surface parameter of PM under the isothermal temperature change is calculated and the law curve of surface parameter is also obtained with the change of temperature. The significant simulation result of surface parameter can effectively evaluate the surface change and guide the structure and environmental adaptation design of the PM. [ABSTRACT FROM AUTHOR]