We would like to detect low fluorescence signals using the MT9M001 camera module (B0063) and USB2 camera shield (B0095). The fluorescence signal is of 670nm wavelength since this camera has a good quantum efficiency in that range we expected the camera to pick up the signal. But we are not able to do the same. The camera needed a very high-intensity light to get a clear image. We tried changing the exposure by altering the register (0x09), we went up to a value of 10000, and we even tried changing the gain settings (register 0x35, value1000), is there a way we can improve the exposure time so that we can detect the low signal? The camera was controlled using the GUI for windows that Arducam has provided (Link-https://github.com/ArduCAM/ArduCAM_USB_Camera_Shield) and also tested on Raspberry PI 4 using the python program provided on the GitHub link.
We are wondering if you could provide us some support on this concerns.