Comment by midnitewarrior

You are describing transmission holograms, the best visual fidelity but it had to be illuminated by laser light. Reflection holograms had a small field of depth before getting blurry but we're visible in white light. Dichromate Gelating (DCG) holograms were also white-light visible, had a smaller depth field than reflection holograms, but we're very sharp and bright. A lot of novelties were made using the DCG process, like novelty glasses that had alien eyeballs in the lenses.