The optically writable layer is optically readable.

The interfacial layer is substantially optically non-absorbing and may be predominately optically transmissive or predominately optically reflective.

The optically clear polymer layer can mechanically and optically couple the scintillator plastic layer to the optically clear substrate.

The first areas are optically anisotropic, the second areas are optically isotropic, and the third areas are not optically isotropic.

The optically variable element comprises an information element and an optically variable layer.

The optically writable material on the card (100) may support optically written digital data and an optically written image, or an optically written image having embedded digital data.

The light modulating stack comprises one or more optically- reflecting layers, optically transmitting layers, and optically variable layers.

The first areas are optical anisotropic and the second areas are optically isotropic.

An optically transparent radio frequency or microwave device has first and second optically-transparent conductive substrates.

This method also enables to produce an optically active alcohol from an optically active lactone or an optically active carboxylic acid ester.

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The optically anisotropic device comprises optically anisotropic film and a diffusing adhesive layer.

Also disclosed is an optically active 2-methoxyphenyl acetate of an optically active trans-2-aminocyclohexanol.

These optically active mono- and diorganylborohydrides provide new, useful optically active reducing agents and convenient sources for optically active mono- and diorganylboranes.

An optically writable, optically readable second layer (406, 506) conforms to the embossment (404, 504).