Concealed Images

Some articles on concealed images, images:

Security Hologram - Electron-beam Lithography
... the viewing of four lasers at a single point, 2D/3D raster text, switch effects, 3D effects, concealed images, laser readable text and true colour images ... Concealed images These usually take the form of very thin lines and contours ... Concealed images can be seen at large angle light diffraction, and at one particular angle only ...

Famous quotes containing the words images and/or concealed:

    A daydream is a meal at which images are eaten. Some of us are gourmets, some gourmands, and a good many take their images precooked out of a can and swallow them down whole, absent-mindedly and with little relish.
    —W.H. (Wystan Hugh)

    Punishment is a fruit that unsuspected ripens within the flower of the pleasure which concealed it. Cause and effect, means and ends, seed and fruit, cannot be severed; for the effect already blooms in the cause, the end preexists in the means, the fruit in the seed.
    Ralph Waldo Emerson (1803–1882)