A holographic or diffraction device responsive to interrogation, the device comprising an image-former and an image-concealer; wherein the image-former is adapted such that light reflected from or transmitted through it forms at least one image; wherein the image-concealer acts to attenuate the image; and wherein the attenuation of the image by the image-concealer is alterable responsive to interrogation.
申请公布号
CA2539294(A1)
申请公布日期
2005.12.22
申请号
CA20052539294
申请日期
2005.06.06
申请人
SMART HOLOGRAMS LIMITED;CAMBRIDGE UNIVERSITY TECHNICAL SERVICES LTD.