P3D Stereojet5

[Bob_Maxey@xxxxxxxx]

>>Back in Aug. 1996, in a response to Marvin Jones I wrote:
>>
>>Dennis Hall and Philip Johnson recieved a Patt. (5,398,131) for a full
>>color stereoscopic hard copy process using two groups of polarizing
>>inks. These are overlayed to produce a single sheet, imaging a stereo
>>pair.
>>
>>More information can be had from the SID 90 Digest, 1990:
>>"Polarizing Color Filters Made From Cholesteric LC-Silicones", pp.
>>110-113, by Robert Maurer et al., and,
>>"Novel Polarized Liquid-Crystal Color Projection and New TN-LCD
>>Operating Modes", pp. 324-326, by Martin Schadt and Jurg Funfschilling.


I am familiar with the first patent, and their process uses polarized inks. This
means Vectograph film is not required. The benefits are that 3D images could, in
theory be printed on any surface. The HUGE Drawback is cost, consistency and
materials. This process would be far more costly than Stereojet is.

Stereojet uses different types of inks which are more readily available than
Polarized Inks are. At least half a dozen manufacturers make Dichroic Inks.

RM