The QHY174GPS camera uses the 1/1.2-inch SONY IMX174 CMOS sensor with global shutter, 5.86um pixels,138FPS@1920*1200, high QE of 78%, and low read noise of 3-5e-. It is useful for imaging occultations, eclipses, meteors, and other scientific imaging requiring a highly precise recording of the time and location of the observation on every frame.
The QHY174GPS has a unique built-in GPS module that can sync with the atomic clock signals received from GPS satellites. The QHY174GPS can record the start and end of exposure time with 1us precision anywhere on earth. The QHY174GPS was selected by the NASA New Horizons Team to successfully captured the MU69 occultation in the Summer of 2017. The QHY174M-GPS has dual stage TE cooling to -45C below ambient with full anti-moisture control including heated optical window and removable desiccant plug for the sensor chamber. The QHY174 also has an anti-amp glow function. It can reduce the IMX174 sensor’s amplifier glow significantly in long exposures.
The QHY174M-GPS records the global shutter exposure starting and ending time with microsecond precision. Two QHY174 cameras, for example, each located anywhere in the world, can have the same time base, accurate to microseconds. In order to guarantee the starting and ending time of the exposure, the QHY174 has a built-in LED pulse calibration circuit precise to 1 microsecond.
| Model | QHY174GPS |
| COMS Sensor | SONY IMX174 CMOS |
| Pixel Size | 5.86um*5.86um |
| Effective Pixel Area | 1920*1200 |
| Effective Pixels | 2mega |
| Effective Image Area | 11.25mm*7.03mm |
| QE | 78% |
| Fullwell | >32ke- |
| AD Sample Depth | 12/10bit (output as 16bit and 8bit) |
| Sensor Size | Typical 1/1.2 inch |
| Full Frame Rate and ROI Frame Rate | 138FPS@1936×1216
260FPS@960×600 490FPS@480×300 *Note：QHYCCD has optimized the cmos drive frequency and limit the max frame rate. The CMOS sensor may not work under the max frequency to ensure the better noise performance. If you need the customized higher frame rate version, please contact QHYCCD. |
| ROI Support | Yes. Any Area ROI |
| Readout Noise | 5.3e-@Gain0% 2.8e-@Gain60% 1.6e-@Gain100% |
| Exposure Time Range | 5us-900sec |
| Binning | 1×1,2×2 |
| Anti-Glow Control | Yes (Reduces amplifier glow significantly) |
| Shutter Type | Electric Global Shutter |
| Computer Interface | USB3.0 Super Speed |
| Non-volatile memory / On camera storage | Build-in total 512Kbytes Flash Memory. 100Kbytes user-accessible space for stellar ROI frames for analysis of exoplanet investigation, occultations, atmospheric seeing measurement, focus , optic analysis etc. Support 100*100 image x 10rames 50*50 image x40frames. 25*25 image x160frames 10*10 image * 1000 frames （total frame numbers is based on 8bit image） |
| Cooling System | Dual Stage TEC cooler（-40C below ambient),
(Test temperature +20°) Temperature Regulated |
| Anti-Dew Control | Connector for removable silicon gel tube
Heater board for CMOS chamber optical window |
| Telescope Interface | M42/0.75 / 2inch faster installer. Optional C-mount adapter |
| Optic Window Type | Mono Version: AR+AR High Quality Multi-Layer Anti-Reflection Coating
Color Version: IR cut coating |
| Guide Port | 6PIN RJ11 Guide Port |
| Color Wheel Port | 4PIN QHYCFW Socket |
| Back Focal Length | 17.5mm |
| Weigth | 450g |
| GPS version, Time-Stamp Precision | 1 micro-second of the GPS UTC clock |
| Reference Price | QHY174M-GPS USD1239 w/TE Cooling |