地基大型光学望远镜大靶面相机成像电路设计

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关键词：大靶面相机；高动态合成；曝光时刻信息；光通信

中图分类号：TP212.9 文献标识码：A

doi：10.37188/OPE.20253321.3373 CSTR：32169.14.OPE.20253321.3373

Abstract： To meet the wide-field detection requirements of ground-based large optical telescopes，a 16.8- megapixel stitchable back-illminated （BSI） sCMOS sensor and its dedicated camera imaging circuitry were custom-developed.This article presents the hardware architecture，functional modules，data-flow design，high-dynamic-range （HDR） synthesis，exposure-event recording，and synchronous operation strategies 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 paralel DDR devices，achieving a maximum read/write throughput of 102.4Gb/s . A custom optical communication interface based on GTX transceivers provides 5Gb/s links for camera control and image transmission. Internal FPGA data transfers employ the AXI-Fullbus protocol to ensure high performance，substantial bandwidth，and flexible interconnectivity. On-chip HDR composition produces high bit-depth composite images in real time.By ingesting and processing time and atitude information，exposure timing is recorded with 1μs resolution. The system supports 16.8-megapixel imaging at 4 frame/s and，through HDR compositing，attains a dynamic range of 95. 52 dB，satisfying the detector system's application requirements.

Key words： large-format camera； high-dynamic-range synthesis； exposure event record; optical commu-nication

1引言

地基大型光学望远镜在空间态势感知和空间目标探测方面发挥着不可或缺的作用[1-4]。（剩余11356字）