Holographic rear window stoplight

Details Holographic rear window stoplight Holographic rear window stoplight

B - Operations, Transporting

60

Q

88/4, 240/45

B60Q 1/44 (2006.01) B60Q 1/30 (2006.01)

Patent

CA 1317920

ABSTRACT OF THE INVENTION An improved holographic rear window stoplight is provided and includes a hologram member laminated to the rear window surface. Single or multiple hologram layers may be provided. The hologram layers can have a diffraction grating developed in a position relative to the other diffraction grating to provide a folded reflec- tion of light from a source of light of an appropriate wavelength band to indicate a stoplight from a predeter- mined angle. Alternatively predetermined indicia can be selectively displayed in either a single or multiple layer configuration. The reflection hologram member is transparent when not in use to all observers and remains transparent to the driver even when in use, and thereby prevents any blocking of his field of view.

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