opencv realsense 16位深度图像

I have a realsense camera and I'm trying to read a 16 bit depth image. I have a problem - when I create direct opencv mat with 16 bit values I see only black image. When I convert 16 bit image to 8 bit with 255/1000 scale, I get normal image, but I don't want to lose that information. I have a realsense camera and I'm trying to rea