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QHY174M-GPS




Introduction

The QHY174 camera is designed to be an excellent planetary, lunar, solar and meteor capture video camera. With a 50mm F1.4 lens it will record mag 8 to mag 9 stars in live video recording at 30FPS (33ms exposure), several magnitudes fainter than can typically be seen with the naked eye.  The QHY174’s high sensitivity with HD resolution will push video astronomy to new heights.

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.

Global Shutter

Unlike a rolling shutter, a global shutter guarantees that the exposure time for the whole image area is uniform, beginning and ending at exactly the same time.  This type of shutter is ideal for high precision time-domain applications.

The QHY174M-GPS will record 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.

Double Working Modes

Master mode:  In Master Mode, the camera is free running and the internal 10MHz GPS synced clock will measure and record the shutter’s opening and closing time.

Slave mode:  In Slave Mode you can input a target start time and the interval period for two frames. For example: You want three cameras in different locations (maybe thousands of kilometers apart) to start an exposure at 2016.3.9.UTC 14:00:00.000000 and then to continue with exposures at the interval time of 0.100000 sec.  After you input these value, all the three cameras will wait until this time and then simultaneously start video recording, e.g.:

2016.3.9 UTC 14:00:00.000033

2016.3.9 UTC 14:00:00.100033

2016.3.9 UTC 14:00:00.200033

2016.3.9 UTC 14:00:00.300033

(The 0.00033 is a global delay of the CMOS shutter).

The time stamp and other GPS information is embedded into the image. The software decodes it in real time and displays the information on left.  Since the data is embedded, it will never be lost so long as you keep the original image.

Specifications
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),

 

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

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