为实现对彩色摄像机颜色分辨力测试,设计了通过双离散颜色源、反射式准直光学系统和四杆靶靶标模块组成的测试装置。双离散颜色源分别产生经过标定的前景和背景颜色光束,经过准直光学系统,最终合成四杆靶测试靶标图像。该系统在测量过...为实现对彩色摄像机颜色分辨力测试,设计了通过双离散颜色源、反射式准直光学系统和四杆靶靶标模块组成的测试装置。双离散颜色源分别产生经过标定的前景和背景颜色光束,经过准直光学系统,最终合成四杆靶测试靶标图像。该系统在测量过程分别获取各频率下从靶标图像中提取的目标靶标并对其进行色差计算,通过图像算法对测试靶标进行判断和识别,获得彩色摄像机的最小可分辨色差(minimum resolvable E difference,MRED)和最小可探测色差(minimum detectable E difference,MDED),实现对彩色摄像机颜色分辨力的客观检测。展开更多
We present an experimental study of a continuous-wave Nd： YVO4 laser diode-pumped directly in band at 880 nm. By using a compact positive confocal unstable-stable hybrid resonator, a maximal laser output of 170 W at ...We present an experimental study of a continuous-wave Nd： YVO4 laser diode-pumped directly in band at 880 nm. By using a compact positive confocal unstable-stable hybrid resonator, a maximal laser output of 170 W at 1064 nm is realized. The slope efficiency and optical-to-optical efficiency are 56.7% and 51.3%, respectively. The M2 factors in the unstable direction and in the stable direction they are 1.9 and 1.3, respectively.展开更多
A high-power cw all-solid-state Nd：GdVO4 laser operating at 88Onto is reported. The laser consists of a low doped level Nd：GdV04 crystal dual-end-pumped by two high-power diode lasers and a compact negative confocM ...A high-power cw all-solid-state Nd：GdVO4 laser operating at 88Onto is reported. The laser consists of a low doped level Nd：GdV04 crystal dual-end-pumped by two high-power diode lasers and a compact negative confocM unstable-stable hybrid resonator. At an incident pump power of 820 W, a maximum cw output of 240 W at 1064nm is obtained. The optical-to-optical efficiency and Mope efficiency are 40.7% and 53.2%, respectively. The M2 factors in the unstable direction and in the stable direction are 4.38 and 5.44, respectively.展开更多
A laser-diode end-pumped Nd：YVO4 slab laser with a fiat-concave stable cavity at 1342nm is demonstrated. Under the pumping power of 92 W, a cw laser of output 17.8 W is obtained with the slope efficiency of 25.6%.
文摘为实现对彩色摄像机颜色分辨力测试,设计了通过双离散颜色源、反射式准直光学系统和四杆靶靶标模块组成的测试装置。双离散颜色源分别产生经过标定的前景和背景颜色光束,经过准直光学系统,最终合成四杆靶测试靶标图像。该系统在测量过程分别获取各频率下从靶标图像中提取的目标靶标并对其进行色差计算,通过图像算法对测试靶标进行判断和识别,获得彩色摄像机的最小可分辨色差(minimum resolvable E difference,MRED)和最小可探测色差(minimum detectable E difference,MDED),实现对彩色摄像机颜色分辨力的客观检测。
文摘We present an experimental study of a continuous-wave Nd： YVO4 laser diode-pumped directly in band at 880 nm. By using a compact positive confocal unstable-stable hybrid resonator, a maximal laser output of 170 W at 1064 nm is realized. The slope efficiency and optical-to-optical efficiency are 56.7% and 51.3%, respectively. The M2 factors in the unstable direction and in the stable direction they are 1.9 and 1.3, respectively.
文摘A high-power cw all-solid-state Nd：GdVO4 laser operating at 88Onto is reported. The laser consists of a low doped level Nd：GdV04 crystal dual-end-pumped by two high-power diode lasers and a compact negative confocM unstable-stable hybrid resonator. At an incident pump power of 820 W, a maximum cw output of 240 W at 1064nm is obtained. The optical-to-optical efficiency and Mope efficiency are 40.7% and 53.2%, respectively. The M2 factors in the unstable direction and in the stable direction are 4.38 and 5.44, respectively.
文摘A laser-diode end-pumped Nd：YVO4 slab laser with a fiat-concave stable cavity at 1342nm is demonstrated. Under the pumping power of 92 W, a cw laser of output 17.8 W is obtained with the slope efficiency of 25.6%.
