In recent years, many commercial shows of holographic display are implemented in a quasi-holographic way, in which a projector or any other means is used to form an image of a light source after 45-degree refraction onto a phantom imaging film (e.g. a holographic film).
Essentially different from a pure holographic way, this quasi-holographic way is implemented with a film having both relatively high transmissivity and relatively high reflectivity. Although such a quasi-holographic display technology allows a viewer to get a feeling of some spatial effect, it is not really holographic, because when viewing the virtual images from the imaging in some angles, the viewer still cannot perceive holographic images having the same display effect as real scenes.