by ʇolɐǝz ǝɥʇ qoq

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I'm currently using it in my Sony DSC-F828 and I think works very well especially in low light condition. I've read a lot of hypothesis about it but anyone know for sure why modern cameras don't use it anymore?

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It appears that the "hologram" AF was simply a contrast based system that shined a laser on the subject to get accurate measurements. It was limited to only a few meters. Modern phase detection AF is much faster and with the use of IR illuminators (which serve a similar purpose to the laser) they are able to focus in near total or total darkness at a much longer range due to their increased sensitivity.

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But phase detection works only for reflex, hologram AF were used for bridge camera, for me it worked great.. – G M Dec 9 '13 at 13:55

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