I have been watching the youtube lectures of Dr.Robbins and they are an excellent way of getting a grasp of the exceptionally complex and difficult thought of Henri Bergson. What I found particularly useful was his explication of the concept of images. The analogy that he uses is that of holographic reconstructive waves. Until they are used there is no imageable content. It looks nothing like what was first projected in the initial wave. The brain is the instrument of the reconstructive wave. Now it may seem anachronistic to apply such an analogy to Bergson's thought on the image but in fact he prefigured the theory in Matter and Memory when he stated that the brain was not the repository for images, like an album of photographs but that in fact the photo was out there already taken. I found this illuminating.
The concept of the image in general is like an iron mountain creating deviation into the classic patterns of thinking about it. Sartre's critique of Bergson on the nature of the image is selected by Robbins for castigation. One doubts that the notion of the hologram ever came up in the interminable discussions in the Dome.
Sartre and Bergson