Sun-sensing systems are used for coarse attitude acquisition and Sun vector estimation. These units typically use quadrant photodiodes or linear arrays, positioned behind pinholes or refractive optics ...

Optical aberration theory remains a fundamental component in the design and operation of space telescopes. With increasingly ambitious astronomical missions and the demand for high-resolution imaging, ...

A space camera optical system based on an off-axis four-mirror freeform design is one such solution, offering a 70° ultra-wide field of view from a 640 km orbital altitude. This system is an ideal ...

Fresnel zone plates (FZPs) are widely used for X-ray focusing and imaging thanks to their compactness and high resolution compared to refractive or mirror-based X-ray optics. However, achieving high ...