理论分析了石英材料内应力对数字太阳敏感器精度的影响机理,对石英样片进行了应力双折射测试,将不同的石英样片装在数字太阳敏感器单机上进行了全视场测试,给出了控制石英材料应力等级的措施。研究结果表明,只有局部内应力集中的石英样片才会产生干扰光斑,这与理论分析结果相吻合。

The influence mechanism of the internal stress in quartz on the precision of digital sun sensors is theoretically investigated. The stress birefringence test of quartz specimens is conducted and the different quartz specimens are mounted on the digital sun sensors for a full visual field test. The means to control the stress level of quartz materials are put forwards. The research results show that there exists interference spots only for the quartz specimens with locally concentrated internal stresses, which is consistent with the theoretical analysis result.