Design of an Afocal Telescope System Integrated with Digital Imaging for Enhanced Optical Performance
Yi-Lun Su, Wen-Shing Sun, Chuen-Lin Tien, Yen-Cheng Lin, Yi-Hong Liu
TL;DR
This paper describes a new afocal telescope system with digital imaging that improves optical performance by reducing aberrations and ensuring efficient energy transfer.
Contribution
The novel integration of an afocal telescope with a digital imaging subsystem achieves high-resolution imaging with minimal aberrations.
Findings
The system achieves an overall magnification of 16× with near-diffraction-limited quality (RMS wavefront error of 0.0474λ and Strehl ratio of 0.915).
The MTF reaches 0.42 at 80 lp/mm with distortion below 4.87%.
Chromatic performance is well controlled with lateral color deviations under 1.52 µm across tested wavelengths.
Abstract
This study presents the design and optimization of a digital-imaging afocal telescope system that integrates an afocal telescope architecture with an imaging optical subsystem. The proposed system employs a combination of spherical and aspherical optical elements to enhance imaging flexibility, reduce aberrations, and ensure effective system coupling. Proper pupil matching is achieved by aligning the exit pupil of the afocal telescope with the entrance pupil of the imaging system, ensuring minimal vignetting and optimal energy transfer. Circular apertures and lens elements are used throughout the system to simplify alignment and minimize pupil-matching errors. The complete system comprises three imaging optical subsystems and a digital camera module, each independently optimized to ensure balanced optical performance. The design achieves an overall magnification of 16×, with…
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Taxonomy
TopicsAdvanced optical system design · Adaptive optics and wavefront sensing · Satellite Image Processing and Photogrammetry