Features Specifications Application Download

QHY4040 Service Support

Sensor Introduction
The QHY4040 uses a GSENSE4040FSI front-illuminated, 16 Megapixel, 36mm square, scientific CMOS image sensor. Featured with five transistor (5T) HDR pixel design on a 9μm pitch, the sensor can achieve 4e- dark noise(in maxium analog gain) and 74ke- FWC simultaneously in HDR mode. The GSENSE4040’s maximum frame rate (at full resolution) is 24fps( QHY4040 camera can get maxium 20FPS due to USB3 bandwidth limit). These features make GSENSE4040 an ideal image sensor for various applications. GSENSE4040 is offered in two variations: CMN and CMT. CMN is a monochrome sensor without microlens array and protected by a removable glass lid, which is ideal for X-ray imaging, charged particle detection, and micro-CT application; while CMT is a monochrome sensor with microlens array and sealed with D263T lids with anti-reflective coating on both sides, ideal for medical imaging and astronomy applications.

Camera Basic Information
QHY4040 standard version is the single channel ADC output version. It is using the High Gain Channel to output the low readout noise image.  It supports both live video mode and single frame mode. In single frame mode. it works on a low CMOS driven speed. The behavior of the noise performance is the same with the 8FPS@16BIT mode in Live video mode.  In live video mode, it support five different CMOS clock.  Max Frame rate from 8FPS to 20FPS. 

The QHY4040 has zero amplifier glow.Please check the following dark frame for it. 

Dark Frame Samples
Here is a dark frame of 10sec exposure and 30sec exposure @-7.5C.   The QHY4040 can get about max 35C to 40C below ambient. 


A detailed Dark Frame Samples (Gain 0 and Gain 16. -15C, 0sec bias frame, 30, 60, 120, 300sec Dark Frame)

About HDR mode support
After QHY4040 standard version released QHYCCD will do the HDR version. To upgrade to this version, the USB transfer board need to be replaced. The upgrade cost is USD1000. 

Hardware Signal of Exposure End Time
QHY4040 support hardware exposure ending signal output. Which can be used for high precise time domain imaging . This signal can be measured by external timing base and you will know the precise time of the starting and ending exposure time.

Multipe Working Mode
QH4040 support the continuous live video mode, single frame mode and burst mode.  In the live video mode, the camera is free running to capture the images. In single frame mode. The camera will start capture one frame when you send the start exposure command. In burst mode, The camera will be in idle status , you can define how many frame will be output and after you send start exposure command, it will start to capture these frames and then stop output. In both single frame mode and the burst mode, the timing is in sync with the start exposure command. It is benefit for the high precise timing record work when work with the hardware exposure ending signal.

This picture shows the hardware exposure ending signal with burst mode that output from the camera.  This is a four frames burst. Each of the falling edge indicate a  exposure ending time. 


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