TO EXPLORE THE UNKNOWN UNIVERSE
Telescope: Askar FRA600
Mount: iOptron CEM40
Filters: Chroma 36mm LRGB Ha
QHY990/991 is the scientific cooled short wavelength infrared camera. with Sony IMX990 / IMX991 InGaAs sensor with a square 5um*5um pixel array and 1.31M / 0.4mega effective pixels. This chip has a wide waveband(0.4um-1.7um) with high sensitivity. QE is up to 77% at 1200nm.
By using the Cu-Cu interconnect technology, the sensor has very low FPN noise and a low defect pixel ratio.
*Please contact QHYCCD about the price.
Both QHY990 and QHY991 include a 25mm filter holder. 25mm filter is a very common filter type for lab applications. The SWIR filter is easy to be installed inside the camera. With this adapter, the camera still meets the 17.5mm C-mount B.F.L.
QHY990 and QHY991 have both air cooling and liquid cooling version. The air cooling can get the -35C below ambient. The liquid cooling version can get -45C below ambient with normal temperature liquid and can get -60 to -80C below ambient with cold liquid. Typically the InGaAs sensor has a high dark current than Silicon-based material. If you are doing the long exposure with this camera (eg. exposure >5 sec) QHYCCD recommends selecting the liquid cooling version.
Applications: SWIR Astronomy Imaging and Photometry, Daytime Star Observing, Optical Communication, Laser, Optic Labs.
| Model | QHY990 | QHY991 |
| CMOS Sensor | IMX990 SWIR Sensor | IMX991 SWIR Sensor |
| FPA Material | InGaAs | |
| Pixel Size | 5.0um*5.0um | |
| Total Pixels
(includes optic black pixels) |
1392*1052 | 752*520 |
| Effective Pixel Area | 1296*1032 | 656*520 |
| Effective Pixels | 1.3 Megapixels | 0.4 Megapixels |
| Effective Image Area | 1/2 inch | 1/4 inch |
| AD Sample Depth | 12-bit A/D | |
| Shutter Type | Electric Global Shutter | |
| QE | 77% @ 1200nm | |
| Full Well | Typical 120ke | |
| Readout Noise | The measured data is after Bias Frame FPN calibration
Typical 150 e- at lowest gain |
|
| Frame Rate | 66FPS@Full Resolution 12bit
137FPS@480Line 12bit |
133FPS @ Full resolution 12bit
254FPS @ 240Line 12bit |
| Trig Function | One Hardware Trig-In Socket (RCA type).Opto-isolated | |
| Computer Interface | USB3.0 | |
| Lens Interface | C-Mount | |
| Telescope Interface | 1.25inch Adapter | |
| Basic Interface | Flange with 6-M3 screw holes | |
| 25mm Filter Adapter | Support D=25mm and D=25.4mm filter | |
| Back Focal Length | C_Mount,1.25inch adapter 17.5mm with 25mm filter adapter, 14.5mm without filter adapter Basic Interface 12.5mm |
|
| Cooling System | Dual Stage TE Cooler
Air Cooling version (Test temperature +20°) Liquid Cooling version |
|
| Recommended flow rates for water-cooled versions | 1.6ml/s | |
QHY990 Sample Image in daytime. With 16mmF1.4 SWIR lens @F2.8 , 1200-1800nm filter. Gain=0, exposure time = 1.3ms. D0wnload 16bit FITs QHY990_DAYTIMEQHY990_DAYTIME
QHY990 Sample image under sky (at night). . With 16mmF1.4 SWIR lens @F1.4 , 1200-1800nm filter. Exposure = 2sec stack 29frames . -11C sensor temperature. Dark frame calibrated.
Here are the stars in the daytime with QHY991 camera by Martin Miller:
All-In-One Pack （Driver, SDK and Software) for WINDOWS supports all QHYCCD USB3.0 devices only except PoleMaster and some discontinued CCD cameras. Please go to https://www.qhyccd.com/download/ and install it.
Note:
The camera requires an input voltage between 11V and 13.8V. If the input voltage is too low the camera will stop functioning or it may reboot when the TEC power percent is high, causing a drain on the power. Therefore, please make sure the input voltage arrived to the camera is adequate. 12V is the best but please note that a 12V cable that is very long or a cable with small conductor wire may exhibit enough resistance to cause a voltage drop between the power supply and the camera. The formular is: V(drop) = I * R (cable). It is advised that a very long 12V power cable not be used. It is better to place the 12V AC adapter closer to the camera.
First connect the 12V power supply, then connect the camera to your computer via the USB3.0 cable. Make sure the camera is plugged in before connecting the camera to the computer, otherwise the camera will not be recognized. When you connect the camera for the first time, the system discovers the new device and looks for drivers for it. You can skip the online search step by clicking “Skip obtaining the driver software from Windows Update” and the computer will automatically find the driver locally and install it. If we take the 5IIISeries driver as an example (shown below), after the driver software is successfully installed, you will see QHY5IIISeries_IO in the device manager.
Please note that the input voltage cannot be lower than 11.5v, otherwise the device will be unable to work normally.
Before using software, make sure you have connected the cooling camera to the 12V power supply and connected it to the computer with a USB3.0 data cable. If it’s a planetary/guiding camera, 12V power is not needed.
Note: We recommend 64-bit Software if possible, like SharpCAP x64 , N.I.N.A x64. etc., especially when you’re using 16bit cameras like QHY600.
EZCAP_QT is software developed by QHYCCD. This software has basic capture functions for QHYCCD deep sky cameras.
Run EZCAP_QT. Click “Connect” in Menu -> Camera. If the camera is successfully connected, the title line of EZCAP_QT will display the camera firmware version and the camera ID as shown below.
Click “Temperature Control” in “Camera Settings” to set the temperature of the CMOS sensor. You can turn on “Auto” to set the target temperature. For example, here we set the target temperature to -10C. The temperature of the CMOS sensor will drop quickly to this temperature (approximately 2-3 minutes). If you want to turn off cooling, you can choose Stop. If you just want to set the TEC power but not the temperature. You can select “Manual” and then set the percentage of the TEC power.
You can use the “preview tab” to preview and use the focus tool to focus. Then use the “capture tab” to capture the image.
Launch SharpCap. If the software and drivers mentioned above are installed successfully, the video image will appear automatically about 3 seconds after the software loads. You will also see the frame rate in the lower left corner of the software window as shown below.
If you have already started the SharpCap software before connecting the camera, in order to open the camera, click on the “camera” in the menu bar and then select the device.
Offset adjustment. When you completely block the camera (i.e., like taking a dark frame) you may find that the image is not really zero. Sometimes this will reduce the quality of the image contrast. You can get a better dark field by adjusting the offset. You can confirm this by opening the histogram as indicated in the figure below.
If you want to enter the 16-bit image mode, select the “RAW16” mode.
By selecting the “LX” mode you can expand the exposure setting range and take long exposures.
After cooling devices connected to the 12V power supply, the temperature control circuit will be activated. You can control the CMOS temperature by adjusting the settings in the figure below. Basically, you can control the temperature of CMOS by either adjusting “Cooler Power” or clicking “Auto” and setting “Target Temperature”. You can also see the CMOS temperature at the lower-left corner of the software window.
With ASCOM drivers, you can use the device with many software packages that support the ASCOM standard. We will use Maxim DL below as an example, but a similar procedure is used for The SkyX and other software packages supporting ASCOM.
First make sure you have not only loaded the ASCOM drivers but that you have also downloaded and installed the ASCOM platform from ASCOM. After both the drivers and platform are installed, start MAXIMDL. Follow the instructions shown below to finish the setup. Then Click Connect in and enter the software.
Open N.I.N.A. – Nighttime Imaging ‘N’ Astronomy. Drive connections via ASCOM. 
Turn on the TE cooler to set temperature. Then set the exposure time to capture the image.
QHYCCD BroadCast WDM Camera is a broadcast driver that supports QHYCCD cameras with video broadcast function, which can meet the needs of customers to send video images to other target software. For example, use sharpcap to connect a WDM-enabled camera, and the sharpcap display video image can be sent to other WDM-supported software for display, which is suitable for video online broadcast applications.
The installation process is over, right-click the computer to find the device manager, and check that the image device name is QHYCCD BroadCast WDM Camera, which means the installation is successful.
HANDYAVI test effect chart:
UFOCAPTURE test renderings:
