Several performance advantages of scientific refrigeration cameras

In recent decades, science and technology have made great strides, and with the addition of machine vision, productivity has developed rapidly. In the field of machine vision, high sensitivity, low noise, high linear response, and precise adjustment of cooling are important parameters for scientific cameras. In the field of science, you cannot use a general camera to observe objects. So what are the performance indicators for cameras working in science?

The US QSI camera has superior performance, wide dynamic range, good linearity, low noise and innovative design, and is widely used in astronomy, medical and industrial imaging. It is a representative camera in the field of science. We use him as a standard to explain.

High sensitivity

Some people think that no matter what kind of camera, as long as the same CCD is used, the sensitivity to light will not be much different. In fact, even with the same CCD, the signal-to-noise ratio between two different cameras is quite different, especially for relatively weak signals, and the signal-to-noise ratio is an essential factor in determining the magnitude of sensitivity, so The sensitivity of different cameras is different.

In those low-signal areas, such as the dust belts of galaxies, which often contain some astronomical images that are of interest to us, the QSI camera with the highest signal-to-noise ratio (high sensitivity) is the key to revealing hidden details.

2. Low noise wide dynamic range

When the signal is acquired by the CCD, if the noise is too large, interference occurs during imaging, which affects the image quality. Noise affects sensitivity and resolution and has an important impact on the image quality of the image. Therefore, low noise is a must for high-quality imaging, and the low noise level of QSI scientific cameras is thousands of times that of ordinary camera equipment.

The dynamic range refers to the range from the brightest part to the darkest part that the CCD can distinguish. The wider the dynamic range, the stronger the layering, the richer the color in the image, and the QSI camera has the advantage of having a wide dynamic range.

3. Linear response

The linear response is the contrast between the signal generated by the CCD and the incident light. In ordinary video applications, the linear response is basically not noticed. In the scientific field, high linearity obviously plays a vital role in scientific applications, such as Precision measurement technology. Features such as high linearity and low noise allow you to accurately capture subtle details in a shorter time. The linearity of a high-performance scientific CCD camera is less than 0.1% over the entire dynamic range, while the pixels are still Have a uniform linear response.

4. Precise cooling

Each CCD generated image receives two different types of signals, one recording the incident light from the detected object and the other recording the heat from the CCD itself. The QSI scientific grade camera cold CCD reduces its own "heat". The cooling capacity of the QSI 500 series camera is about 38 °C below ambient temperature, and the temperature adjustment is accurate to 0.1 °C. The QSI 600 series cameras have a higher cooling capacity, which is about 45 ° C below ambient temperature. This type of camera is also commonly referred to as a cooling camera.

The above four parameters are the main performance advantages of scientific cameras. In addition to them, QSI cameras have many advantages, such as small size, low power consumption, optional built-in color filter turntable and special construction. At present, Beijing Sardi Technology Co., Ltd. has successfully represented the US QSI camera. For more information, please visit Or call us.