作为全固态微光器件,In x Ga1-x As器件通过调节材料组分x值,其响应波段覆盖夜天光辐射的主要波段,对夜天光的能量利用率高。加之材料量子效率高,器件性能好,可望显著提高夜视系统作战距离;另外,采用半导体常规工艺制作,可完成大面阵、...作为全固态微光器件,In x Ga1-x As器件通过调节材料组分x值,其响应波段覆盖夜天光辐射的主要波段,对夜天光的能量利用率高。加之材料量子效率高,器件性能好,可望显著提高夜视系统作战距离;另外,采用半导体常规工艺制作,可完成大面阵、长线列器件制备,无需封装在(超)高真空系统,制备简单;采用CMOS读出电路进行信号数据的读取、传输与放大,有利于进行数据的处理和优化改善。由于具备的以上技术优势,In x Ga1-x As器件成为一种新型的高性能全固态数字化微光器件。In x Ga1-x As器件与传统的微光器件在光电转换原理以及器件制备方面存在不同,决定了两者在性能上存在的差异。文中对此进行了对比分析,分析结果体现了In x Ga1-x As全固态数字化微光器件的技术优势和特点,以及In x Ga1-x As全固态数字化微光器件存在的重要应用和发展需求。展开更多
This study is concerned with determining the altitude of the sun under the horizon to the beginning and the end of the true and pseudo dawn and dusk. In 2007 and 2008, the Sky Quality Meter (SQM) was used in four regi...This study is concerned with determining the altitude of the sun under the horizon to the beginning and the end of the true and pseudo dawn and dusk. In 2007 and 2008, the Sky Quality Meter (SQM) was used in four regions in Malaysia to measure the brightness at night, pseudo dawn, true dawn, true dusk and pseudo dusk. The measurements were taken when the device was directed to the position of sunrise and sunset at the horizontal angle of the sunrise or sunset and at five degrees above the horizon during the entire monitoring period. The altitude of the sun for the true dusk was found to be -14.38°± 0.91°and for the beginning of the pseudo dusk was found to be -14.86°± 0.91°and the end of the pseudo dusk is -17.8°± 0.7°, while for the beginning of the true dawn it was found to be -14.19°± 0.52°(for high confidence -14.71°) and for the pseudo dawn was found to be -18.62°± 0.82°. The light magnitude of the full night after the pseudo dusk was found to be 20.77 ± 0.93 mag./arcsec<sup>2</sup>, while it was found to be 22.17 ± 0.1 mag./arcsec<sup>2</sup> before the pseudo dawn.展开更多
文摘作为全固态微光器件,In x Ga1-x As器件通过调节材料组分x值,其响应波段覆盖夜天光辐射的主要波段,对夜天光的能量利用率高。加之材料量子效率高,器件性能好,可望显著提高夜视系统作战距离;另外,采用半导体常规工艺制作,可完成大面阵、长线列器件制备,无需封装在(超)高真空系统,制备简单;采用CMOS读出电路进行信号数据的读取、传输与放大,有利于进行数据的处理和优化改善。由于具备的以上技术优势,In x Ga1-x As器件成为一种新型的高性能全固态数字化微光器件。In x Ga1-x As器件与传统的微光器件在光电转换原理以及器件制备方面存在不同,决定了两者在性能上存在的差异。文中对此进行了对比分析,分析结果体现了In x Ga1-x As全固态数字化微光器件的技术优势和特点,以及In x Ga1-x As全固态数字化微光器件存在的重要应用和发展需求。
文摘This study is concerned with determining the altitude of the sun under the horizon to the beginning and the end of the true and pseudo dawn and dusk. In 2007 and 2008, the Sky Quality Meter (SQM) was used in four regions in Malaysia to measure the brightness at night, pseudo dawn, true dawn, true dusk and pseudo dusk. The measurements were taken when the device was directed to the position of sunrise and sunset at the horizontal angle of the sunrise or sunset and at five degrees above the horizon during the entire monitoring period. The altitude of the sun for the true dusk was found to be -14.38°± 0.91°and for the beginning of the pseudo dusk was found to be -14.86°± 0.91°and the end of the pseudo dusk is -17.8°± 0.7°, while for the beginning of the true dawn it was found to be -14.19°± 0.52°(for high confidence -14.71°) and for the pseudo dawn was found to be -18.62°± 0.82°. The light magnitude of the full night after the pseudo dusk was found to be 20.77 ± 0.93 mag./arcsec<sup>2</sup>, while it was found to be 22.17 ± 0.1 mag./arcsec<sup>2</sup> before the pseudo dawn.
