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Optical Systems

Automotive-holographic-signal-lamp

Method and apparatus for maximizing the visual quality of image presented in electric form

OF THE INVENTION Referring to the block diagram in FIG. 1, the procedure of the invention works as ...

Encoded security document

Security documents of value, prepared in accordance with the present invention, are made difficult ...

Side alignment mark

This invention overcomes the above-noted disadvantages. An apparatus in accordance with this ...

Optical transmission and receiving module

According to one aspect of the invention, an optical transmission and receiving module includes a ...

Calibration method for spectroscopic systems

OF THE INVENTION The present invention provides a method of calibrating spectroscopic systems that ...

Holographic puzzle

The present invention provides a multiple piece puzzle which draws upon the technological area of ...

Art form and method of producing same

The present invention relates to a new art form which includes the use of Moire patterns applied in ...

Segmented hologram for multi-image display

As a consequence of the above, it is an object of the present invention to provide a holographic ...

Heads-up and heads-down displays employing holographic stereograms

In view of the foregoing state of the art, it is an object of the present invention to provide ...

Seam structure of rubber sheets

OF THE PREFERRED EMBODIMENT Referring to FIG. 3 of the drawings, a seam structure 30 of connecting ...

Automotive holographic signal lamp

Details

Inventors: Allred, Christopher S.; Landwehr, Dewayne A.;
Assignee: General Motors Corporation (Detroit, MI)
Primary Examiner: Gromada; Denise L.
Assistant Examiner: Cariaso; Alan B.
Attorney, Agent or Firm: Helms; Ernest E.

An automotive signal lamp is provided including a lens illuminated by a first light source on a first side, a transmissive hologram adjacent the lens for providing an image when the first light source is activated, and a reflective hologram adjacent the transmissive hologram for providing an image when the first light source is nonactuated and the lens is illuminated by a second light source on a second side of the lens generally opposite the first light source.

DETAILED DESCRIPTION To provide an improvement in automotive signal lamps over that previously provided, the present invention is brought forth.
The present invention in a preferred embodiment provides an automotive signal lamp having a transmissive hologram which allows for an optical prescription, required to meet FMVSS 108, when the brake lamp is applied.
When activated, the transmissive hologram provides a mainly two-dimensional image.
Additionally, the present invention also includes a reflective hologram allowing a three-dimensional image to appear when the brake lamp is not applied.
The three-dimensional image if desired may be purely ornamental, providing an artistic design.
When the brake lamp is applied, the transmissive hologram is activated to an extent which overcomes the reflective hologram and an alternative or more full design can be provided.
Optionally, a different warning signal may be utilized by the transmissive hologram to warn a potential rearward driver that an automobile intends to turn or slow down.

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