12.5μm长线列碲镉汞焦平面杜瓦组件

Dewar for 12.5 μm long linear HgCdTe IRFPA

256×2碲镉汞焦平面模块由2个256×1元芯片和2个光伏信号硅读出电路模块平行对称组成,并分别与2个不同波段的微型滤光片以架桥式结构直接耦合后封装在全金属微型杜瓦内,形成了长波256×2长线列碲镉汞红外探测器件组件。基本解决了256×2焦平面杜瓦组件的关键技术,即高精度的组装技术、器件在冷平台上的热失配设计技术和高可靠性封装技术。对抑制杂散光、降低背景辐射、提高组件的可靠性等方面采取了一系列措施,使研制的碲镉汞焦平面器件获得了良好的性能,并进行了一系列空间适应性实验,实验前后的组件性能未发生明显变化,满足工程化应用的要求。

The 256×2 HgCdTe focal plane array consists of two 256×1 sub-modules and two photovoltaic silicon readout integrated circuits in parallel and symmetrical configuration.Two different narrowband filters are separately assembled by filter pier.The long wave 256×2 long linear HgCdTe focal plane array is assembled in a metal Dewar.The key technologies of 12.5 μm long linear HgCdTe focal plane array Dewar are solved,which include high accuracy assembly,thermal mismatch design for long linear HgCdTe focal plane array and high reliability package.A series of technologies are used for the suppression of the stray light,the reduction of background radiation and reliability enhancement,which made HgCdTe focal plane array detector performs much better.Some space environmental tests are carried out.Results show that the main performances do not change.The IRFPA detector satisfies the requirements of space application.