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QHY4040 Manual
2019 年 06 月 01 日
QHY4040
Scienfitic CMOS Camera 
User Manual Rev. 1.0

 
This document is online document. You can print it to use. QHYCCD reserved the right that modificate this document without info.

Contents in Package

Please check the following items is in the package
3.0 USB cable 1
Power cable with locker 1
12V AC Power Adapter 1*
Silicon gel tube and slicon gel 1
M54 to 2inch T-ring 1
Center/tilt adjust ring 1
Camera Cover 1
Warrentee Card 1
Driver Download Card 1
Test Report 1
Camera body 1
 * The 12V power adapter is depend on the area/country. Some country/area has no this item.


Context


01 Software Installation
02 Interface

03 Using the QHY4040 in SharpCap
04 Using QHY4040 in ASCOM
05 Using QHY4040 in EZCAP_QT
06 Using QHY4040 in FireCapture
07 FAQ
08 Camera Maintaince
09 Specification
10 Mechanical Size
11 Verison History


01 Software Installation

Please go to the QHY4040 Driver download page 
1.Download and install camera system driver (link)  
(The driver for Windows10 can be installed  directly; when installing the driver for  Win7 system,please check  the driver installation instructions first)



 
2.Download and install ASCOM Platform(link)

 
3.Download and install ASCOM Driver (link)


4.QHY4040 uses the SharCAP software as the default video display and capture software. Please download and install SharpCap,QHY4040 can work in SharpCap 2.9 or higher version.  You may need to use the last QHYCCD sdk (QHYCCD.DLL) in the sharpcap. Please go to the QHYCCD SDK download page to download it and read how to replace the QHYCCD.DLL in sharpcap.
 
5. Connect the 12V power supply for QHY4040. Then connect the USB3.0 cable between QHY4040 and computer. Please make sure you are connected on the computer USB3.0 port. The QHY4040 can not work under USB2.0 port under the live video mode (in single frame mode it works) due to the high data bandwidth. Please make sure the 12V is connected otherwise the camera maybe not get reconginzed by computer. When first connecting , the windows will report new device found and looking for the driver. You can click "ignore obtain driver from windows" to get it faster. The computer will looking for the driver in local disk. Since the QHY4040 system driver is installed before. So it should find it and start to install hardware. After successfully installed, you can see QHY5IIISeries_IO in the hardware manager.






02 Interface Intoduction

On front of the camera, you can connect the center/tilt adjust ring. The ring has M54/0.75 female thread. On back side of the camera there is the 12V DC power input port and USB3.0 port.  On the side of the front part of the camera, there is a silicon gel tube socket. 


03 Use QHY4040 in SharpCap

1.  Connect 12V power cable and USB3.0 cable.
 
2.  Run SharpCap software. And select the QHY4040 in the "camera" menu.  If everthing is ok, the video image will appear on the display window and you will see the frame rate on left bottom of the software. 


3. If you can not find the QHY4040 in the "camera" menu, you can try "re-scan" camera in this menu.
 
4. Adjust offset. You can cover the lens and check the image. The image maybe not very dark. You need to adjust the offset . You can open the histogram window to help you to find a suitable offset. Normally speaking, you need to adjust the offset and let the background peak in the histogram to visible, above zero and near to zero. It is best to keep the whole peak is above zero.

5. By check the “LX” mode you can expand the exposure time in the exposure time progress bar. You can try some longer exposre and you will see some hot pixel appears, You can set the cooler and cooling the cmos sensor and reduce the dark current. The hot pixel will become less.  The following picture is a typical picture of -10C, 10sec exposure and gain = 50. 
 


6. The following adjust tools is for temperature regular control. When set to Auto , you can set the target temerpature. The QHY4040 has maxium -35C delta T below ambinet. You can set a suitable target temperature according the enviroment temperature. Please reserver some degree to avoid the camera working in just -35 delta T, otherwise when enviroment get higher , you can not get the target temperature and cause the dark frame calibration has problems. When set Auto off, you can set the cooler power to adjust the TEC power. The range is 0% to 100%. In this mode, the sensor temeperature is not regulated. Just the power is constant.


 
Before using the cooler, it is best to read the "how to protect the cooler" in the FAQ.


04 Use QHY4040 in ASCOM
Witht the ASCOM driver support, the QHY4040 can works in many software which support ascom interface. Please note QHY4040 will use the 16bit mode under ascom and use the single frame mode under ASCOM. Currently it does not support the ASCOM VIDEO DRIVER. The ADC in QHY4040 is 12bit. So for 16bit format, the bit alignment is MSB alignment. It will patch four zero in last four bit.  It means the 0-4095 will be mapped to 0-65535 by multiple 16. 

Here we use MAXIMDL software to show how it works.
1. Please make sure the ascom platform and QHY4040 ascom driver is installed.
2. Run MAXIMDL
3. Following this picture to set it.
 
 
Click "Connect"
 

 
Click "Start" to capture one frame. 

 
06 在EZCAP_QT中使用QHY4040

EZCAP_QT ,is a software development by QHYCCD.  This software has both windows, linux and MAC/OS version . This software is created with the opensource QT software. this software can be modified if you want the source code. It has the basic capture function and working in single frame mode .  
1. Install EZCAP_QT
2. Connect 12V power cable and USB3.0 cable
3. Run EZCAP_QT,Menu->Camera->”Connect”. If the camera conneted successfully, the title of the EZCAP_QT will diplay the firmware version of camera and the camera ID


You can change the language of the softwre at menu->language.
 
4. In menu->camera setting->temperature setting, you can set the power and target temperature. In AUTO mode, you can set the target temperature.  And in manual, you can set the TEC power percent. It may need some minutes to get the temperature to target.
 
 
5. One left of the software there is some TAB. You can use the preview TAB to do some preview. And you can select an area in the preview image area and use the focus TAB to do focusing.  And then use the Capture TAB to capture the image
 


6. There is a planner in the EZCAP_QT. You can do a sequence capture with this planner.
 




08 FAQ
1.如何避免相机卡死?
如果相机一直卡死,它有可能是多种原因导致的,您可以按照下面的提示进行检查。
1)   您的电脑配置的是否是VIA芯片组或者一些类型的主板,在SharpCap上根本不出图(但是在ASCOM上工作却正常)在这种情况下,您需要开启相机的DDR缓冲
2)   您的电脑和赤道仪是否漏电?这可能会导致漏电流通过GND从电脑上转移到相机上。这有可能会影响USB传输、丢失数据包、相机卡死。您需要确保电脑和赤道仪都很好的接地。
3)   USB接口的电压是否足够高?一些电脑的USB接口电压达不到5V。这样可能会导致相机一直卡死。在这种情况下,您可以选择通过使用带电源的USB3.0 Hub来连接电脑和相机,这样能够确保相机得到5V的电压。
4)   CPU使用率是否太高?如果CPU使用率过高,将会导致很多帧丢失并且会使得相机卡死。您可以增大USB traffic值来降低FPS,从而获得更稳定的图像传输。
5)   USB连接线是否连接牢靠?有时相机与USB连接线的连接问题以及电脑与USB连接线的连接问题会导致信号丢失并且使相机卡死。尤其是当USB连接线移动时。在这种情况下,您可以尝试在USB接头和插口部分涂一些硅油。这样会使得USB连接更加稳定。
6)   避免静电。有时人体上携带的静电会导致相机卡死。在触碰相机前,您可以接触一下电脑机箱外壳来释放静电。
7)   一些计算机的前置USB接口不太适合高速数据传输(原因是它们是通过连接线连接到主板的,这样使得信号完整性变差)。如果您发现相机在前置USB接口使用时一直卡死,您可以尝试将相机连接至它的后置USB接口(它们直接连接到了主板的芯片组)。
 
2. 如何清洁CMOS传感器和光学窗口?
如果您发现在CMOS传感器上有灰尘,您先可以拧掉QHY4040的前半部分,然后使用单反相机传感器用的清洁套装清洁CMOS传感器。注意QHY4040的CMOS传感器清洁过程中一定要小心谨慎。
您同样可以使用单反清洁工具或者镜头纸来进行清洁。注意用力不能过大,因为涂层很脆弱很容易被擦出划痕。
 
 
3.QHY4040的辉光抑制功能保证图片零辉光。

 
4.什么是相机内置DDR缓冲器?它的优点有哪些?
QHY4040内置有128MB DDRII 图像缓冲器。它有两个优点:
它可以缓冲整张图像从而避免在USB传输过程中丢失。因为CMOS传感器一旦开始工作就会不间断地曝光,输出图像,周而复始,并且不能停顿。但是计算机会因为操作系统多任务处理的特性会暂停一下USB传输,如果这个暂停时间过长,USB中的存储能力很小的缓冲器就会充满,导致即将到来的数据丢失。还有可能会导致一帧的部分数据丢失形成一个坏帧。对于短时间曝光,这也许不会造成太大的问题,但是对于长曝光,这意味着要丢失一帧长曝光图像。128MB DDRII缓冲器可以通过将整帧图像存储起来和传输,从而解决这样的问题。即使USB传输暂停很长时间也不会丢失数据。
另一个优点就是当使用一些运行不快的或者对USB3.0支持不好的电脑时,它会使视频图像更加细腻顺畅,这些电脑不能很好的进行高速数据传输,数据会经常丢失,有了DDR缓冲器,它可以缓冲很多图像数据然后发送到电脑。即使USB3.0经常暂停传输,它也会保证数据不丢失。 SharpCap中有选项来打开或者关闭DDR缓冲功能。目前版本的ASCOM驱动一直工作在DDR模式中。
 
 
5.如何保护制冷器?
QHY4040的制冷器可以实现将近35℃的环境温差。您在使用过程中应该避免热冲击,所谓热冲击是指当制冷器的温度骤然上升或下降时,制冷器由于热胀冷缩原理所要承受的内部强应力,距离的热冲击会缩短制冷器寿命甚至彻底损害制冷器。
因此,当您开始使用制冷器来调整CMOS的温度时,您应该避免一下就将制冷器开启到最大功率,而应该逐步的增大制冷器的功率。在断开电源前,如果制冷器的功率比较高,你也应该逐步减小制冷器的功率然后再断开电源。
 
 
 
6. 在开启DDR模式的状态下相机运行一段时间后帧率下降为0,该如何解决?
有部分用户反映,其带有DDR模块的相机在SharpCap上运行一段时间后帧率下降为零;这样的问题是由于CMOS芯片的输出速率高,而计算机的接收速率慢导致的。CMOS传感器一旦开始工作就会不间断地曝光,输出图像,周而复始,并且不能停顿。如果计算机由于操作系统的原因暂停USB传输过于频繁,就会导致DDR数据溢出,使得坏帧不断产生,进入DDR的图像没有一张图像是完整的,因此帧率为零。
解决方法:
第一个方法更换更好的电脑,对于性能不好的电脑我们建议更换来保证相机运行正常。
第二个方法就是在SharpCap关闭DDR模式,但是对于性能不是非常好的电脑,由于其本身数据传输速度较慢,这种方法不一定有效。


7. QHY4040如何避免水平噪声
当相机连接在具有高噪声的USB端口时会出现水平噪声的图像,更换USB接口,当相机处于良好USB端口上可以得到干净图像。点击查看详情
 

8.相机保养
干燥相机CMOS腔
CMOS传感器位于CMOS腔内。在QHY4040相机的前端的侧面有一个孔。 如果CMOS腔内有潮气使得传感器玻璃结雾,您可以通过这个孔连接硅胶管来进行干燥。
请在硅胶棒中放入有效的硅胶干燥剂并确保里面有棉花以防止硅胶进入到CMOS腔内。
 
9.如何防止CMOS密封腔的光学窗口结雾
如果环境湿度非常大,CMOS密封腔的光学窗口就可能有结露的问题,QHY4040有一个内置的加热板来给 加热来防止结雾,在大多数情况下,它的效果非常明显。如果结雾问题仍然存在,请尝试一下方法:
1. 避免让相机朝向地,冷空气的密度要比热空气的密度大,如果相机朝下向地,冷空气会更容易接触到玻璃使得它降温进而结雾。
2. 提高CMOS传感器的温度。您可以稍微提高一下CMOS传感器的温度来防止玻璃结雾。
3. 检查加热板是否工作,如果加热板没有工作,玻璃会非常容易结雾,通常情况下加热板的温度在25℃的环境下可以达到65-70℃。如果它没有达到这么热,有可能是因为加热板损坏,您可以联系我们来更换加热板。

10.关于外触发控制,QHY4040硬件支持外触发功能,如有需要请在购买前联系QHYCCD加装此功能。

11.SharpCap中 Speer 设置
当相机处于高速情况下时,图像有可能会出现相位错位的情况,请尝试调低速递(Speed)解决。
在软件的Speed设置中有的步数会出现0帧无法出图,请参见下表设置 Speed。

8bit     Speed 0 1 2 3 4
Use DDR Buffer Off Yes Yes Yes Yes Yes
Use DDR Buffer On Yes Yes Yes No No
16bit    Speed 0 1 2 3 4
Use DDR Buffer Off Yes No No No No
Use DDR Buffer On Yes No No No No

10规格参数
QHY4040FSI-U3 科学级CMOS相机规格表
型号 QHY4040FSI
CMOS芯片 Gpixel Gense4040 FSI version
像素大小 9.0um*9.0um
传感器表面玻璃 Clear Glass
全解析度
4096*4096
有效像素数
16.8mega pixel
感光面积
36.9mm*36.9mm
满井电荷数
 
输出样本深度
单12BIT输出。 12BIT / 8BIT输出
注意:由于USB3.0传输速度的限制。目前USB3.0版本的QHY4040仅支持单个ADC通道。 对于双ADC通道,请等待QHY4040 10GigaE版本。
典型尺寸
 
帧率@全分辨率下
20FPS@4096*4096 8bit (Clock Speed 4)
18FPS@4096*4096 8bit (Clock Speed 3)
16FPS@4096*4096 8bit (Clock Speed 2)
12FPS@4096*4096 8bit (Clock Speed 1)
8FPS@4096*4096 8bit (Clock Speed 0)
8FPS@4096*4096 12bit (Clock Speed 0)
读出噪声 4e
暗电流 TBD
曝光时间范围 20us-300sec
快门类型 电子滚动快门
电脑接口 USB3.0  (in QHY4040FSI-USB3)         (in Nov 2018) 
10GigaE Fiber (in QHY4040FSI-10G)  (Under developer)
内置图像缓存 128MByte(512Mb) DDR2 memory in QHY4040FSI-USB3
2GByte(8Gb) DDR3 memory in QHY4040FSI-10G
制冷系统
双层制冷系统(-35C below ambient)
Anti-Dew 加热器
Yes
望远镜接口
M54/0.75 快速安装/中心调整环上的内螺纹
光学窗口

AR+AR高品质增透滤镜

后截距
17.5mm(±0.2)
重量
785g
参考价格
QHY4040FSI-USB3   

机械尺寸图:
注:如需精确每一台的后截距参数,请在购买前联系QHYCCD,我们将在发出前为您标注每一台的后截距参数。

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