论文标题
使用320x256 E-APD红外saphira检测器对C-RED ONE摄像机的最后表演改进
Last performances improvement of the C-RED One camera using the 320x256 e-APD infrared Saphira detector
论文作者
论文摘要
我们在这里介绍了最新的结果，该结果是通过First Light Imaging开发的C-RED One摄像头，用于快速超低噪声红外应用。该相机在自主的低温环境中使用Leonardo Saphira E-APD 320x256红外传感器，具有低振动脉冲管，并带有嵌入式读取电子系统。最近对相机进行了一些改进。第一个重要的是相机的总噪音。在室温和f/4梁孔径处的黑体限制为1.75微米的波长切断，我们现在在CDS模式1720 fps中测量总噪声至0.6 e，在增益为50，将先前的噪声数除以因子2。现在，相机的总相机背景为30-400 e/s，现在可以通过摄像机30-400 e来实现30-400 e/s的光束，从而使摄像头30摄像机，也可以在摄像机的范围内降低。由于电子接地方案而引起的图像偏置振荡被仔细分析并去除。还分析了脉冲管冷却机传输的焦平面检测器振动，将阻尼和测量降低至0.3微米RMS，将焦点平面振动降低了因子3。此外，现在还使用了更高容量的真空吸尘器，用于在几个月内无需摄像机泵送摄像机操作。相机主特征详细详细：脉冲管在80k处冷却，振动有限，永久真空解决方案，超低延迟cameralink完整数据接口，通过固件对摄像机的安全管理，在线固件更新，环境液体冷却和减轻重量为20 kg。
We present here the latest results obtained with the C-RED One camera developed by First Light Imaging for fast ultra-low noise infrared applications. This camera uses the Leonardo Saphira e-APD 320x256 infrared sensor in an autonomous cryogenic environment with a low vibration pulse tube and with embedded readout electronics system. Some recent improvements were made to the camera. The first important one concerns the total noise of the camera. Limited to 1.75 microns wavelength cut-off with proper cold filters, looking at a blackbody at room temperature and f/4 beam aperture, we now measure total noise down to 0.6 e at gain 50 in CDS mode 1720 FPS, dividing previous noise figure by a factor 2. The total camera background of 30-400 e/s is now achieved with a factor 3 of background reduction, the camera also looking at a room temperature blackbody with an F/4 beam aperture. Image bias oscillations, due to electronics grounding scheme, were carefully analyzed and removed. Focal plane detector vibrations transmitted by the pulse tube cooling machine were also analyzed, damped and measured down to 0.3 microns RMS, reducing focal plane vibrations by a factor 3. In addition, a vacuum getter of higher capacity is now used to offer camera operation without camera pumping during months. The camera main characteristics are detailed: pulse tube cooling at 80K with limited vibrations, permanent vacuum solution, ultra-low latency Cameralink full data interface, safety management of the camera by firmware, online firmware update, ambient liquid cooling and reduced weight of 20 kg.
