光学精密工程2025，Vol.33Issue(21)：3373-3382,10.DOI:10.37188/OPE.20253321.3373
地基大型光学望远镜大靶面相机成像电路设计
Design of imaging circuit for large-format camera of ground-based large optical telescope
摘要
Abstract
To meet the wide-field detection requirements of ground-based large optical telescopes,a 16.8-megapixel stitchable back-illuminated(BSI)sCMOS sensor and its dedicated camera imaging circuitry were custom-developed.This article presents the hardware architecture,functional modules,data-flow de-sign,high-dynamic-range(HDR)synthesis,exposure-event recording,and synchronous operation strate-gies implemented in the circuit system.An FPGA serves as the central processor,enabling a modular and highly integrated architecture.Data caching is realized with four parallel DDR devices,achieving a maxi-mum read/write throughput of 102.4 Gb/s.A custom optical communication interface based on GTX transceivers provides 5 Gb/s links for camera control and image transmission.Internal FPGA data trans-fers employ the AXI-Full bus protocol to ensure high performance,substantial bandwidth,and flexible in-terconnectivity.On-chip HDR composition produces high bit-depth composite images in real time.By in-gesting and processing time and attitude information,exposure timing is recorded with 1 μs resolution.The system supports 16.8-megapixel imaging at 4 frame/s and,through HDR compositing,attains a dy-namic range of 95.52 dB,satisfying the detector system's application requirements.关键词
大靶面相机/高动态合成/曝光时刻信息/光通信Key words
large-format camera/high-dynamic-range synthesis/exposure event record/optical commu-nication分类
信息技术与安全科学引用本文复制引用
刘塔拉,任同阳,于勇,贾建禄,王之一,王建立,刘昌华,马俊林..地基大型光学望远镜大靶面相机成像电路设计[J].光学精密工程,2025,33(21):3373-3382,10.基金项目
国家自然科学基金资助项目(No.12122304,No.12303085,No.12473083) （No.12122304,No.12303085,No.12473083）
中国科学院青促会优秀会员资助项目(No.Y2023060) （No.Y2023060）
