Apparatus for high speed image capture during measurement of capillary pressure in a porous sample

A capillary pressure measurement device, comprising:

• a centrifuge comprising a rotating apparatus adapted to hold a plurality of porous media samples and configured to test the porous media samples under centrifugal motion during rotation of the rotating apparatus;
• a fluid capture device disposed adjacent to each of the porous media samples during rotation for receiving fluid displaced from the respective porous media samples due to centrifugal motion applied to the respective porous media samples by rotation of the rotating apparatus;
• a measurement system that measures an amount of fluid displaced from each of the porous media samples, the measurement system including a light source that illuminates respective fluid capture devices, a camera that takes an image of a fluid meniscus in the respective fluid capture devices, and a position sensor that determines a position of the respective fluid capture devices and triggers the camera to take the image of each fluid meniscus when the fluid meniscus is in a field of view of the camera, wherein each fluid meniscus represents a fluid volume that is correlated to capillary pressure of a corresponding porous media sample;
• and
• a shield configured to block light from the light source from reaching the camera other than when the meniscus is in the field of view of the camera, the shield comprising a slot adjacent to each fluid capture device adapted to expose the camera to the light source when the meniscus is in the field of view of the camera.