摘要:
Methods create images viewable under different selected angles on optical storage devices and other photosensitive surfaces and optical storage devices with super-imposed images. Generally, a photosensitive surface is exposed with multiple diffraction patterns creating super-imposed images. These diffraction patterns create super-imposed images on the photosensitive surfaces, which can be read by either a human or a computer.
摘要:
Methods create images viewable under different selected angles on optical storage devices and other photosensitive surfaces and optical storage devices with super-imposed images. Generally, a photosensitive surface is exposed with multiple diffraction patterns creating super-imposed images. These diffraction patterns create super-imposed images on the photosensitive surfaces, which can be read by either a human or a computer.
摘要:
Methods create images viewable under different selected angles on optical storage devices and other photosensitive surfaces and optical storage devices with super-imposed images. Generally, a photosensitive surface is exposed with multiple diffraction patterns creating super-imposed images. These diffraction patterns create super-imposed images on the photosensitive surfaces, which can be read by either a human or a computer.
摘要:
The invention relates to a method for producing a substrate having a resist layer in the form of a relief structure, which represents a diffraction structure. The resist layer at least in certain areas adjoins a conductive layer, which scatters the primary electrons and/or produces secondary electrons when the resist layer is exposed by means of an electron beam. With this method the material of the resist layer and the conductive layer and the exposure parameters are adjusted to each other such that the resist layer is also exposed outside the area impinged with the electron beam such that the flanks of the relief structure obtain an inclined form.
摘要:
A method of generating a holographic diffraction pattern and a holographic lithography system are disclosed. The method involves defining at least one geometrical shape; generating at least one line segment to represent the at least one geometrical shape; calculating a line diffraction pattern on a hologram plane, including calculating the Fresnel diffraction equation for an impulse representing the at least one line segment with a line width control term and a line length control term; and adding vectorially, where there are two or more line segments, the line diffraction patterns to form the holographic diffraction pattern. The method and system enables holographic masks to be generated without creating a physical object to record. The required shapes or patterns are defined in terms of a three-dimensional coordinate space and a holographic pattern is generated at a defined distance from the shapes in the coordinate space.
摘要:
Provided in a photomask for use in production of a hologram element having desired optical characteristics, a method for producing a hologram element, and a hologram element having desired optical characteristics. The first photomask is used for photolithography-based production of a hologram element having a hologram divided into two regions carrying a diffraction grating. The first photomask includes the first, second mask region having the non-light-transmitting mask portion and the light-transmitting portion, for forming the diffraction gratings of the regions of the hologram. The two mask regions differ in alignment-direction-wise arrangement interval for the light-transmitting portions and in ratio of the alignment-direction-wise width to the alignment-direction-wise arrangement interval for the light-transmitting portions.
摘要:
An interferometric lithography method includes providing a first layer of material over a substrate and providing a second layer of material over the first layer of material. The method further includes providing a layer of photoresist over the first and second layers of material and providing coherent light to the first and second layers. The coherent light has an intensity insufficient to chemically transform the photoresist. The coherent light reflects off the first and layers to interfere with an intensity sufficient to chemically transform the photoresist.
摘要:
A technique for forming a mold to replicate large numbers of plastic articles, such as by injection or blow molding, wherein the mold contains a hologram or other microstructure for transfer to an outside surface of the molded article. The mold is made by electrodepositing a metal on a model of the article to be molded. Before this deposition, the hologram or other microstructure is formed on a surface area of the model by any one of several techniques. The result is a unitary mold piece in the shape of the article and having the hologram or other microstructure integrally formed on its inside surface.
摘要:
Pulse width modulated surface relief phase holograms are produced on a substrate by developing a holographic interference pattern recorded on a photoresist deposited on the surface of said substrate as an amplitude modulated sinusoidal surface relief pattern so as to expose the surface of said substrate as a function of the intensity of said interference pattern, uniformly etching said substrate and removing said photoresist leaving a pulse width modulated, substantially two-level rectangular wave diffraction grating. Focused image holograms produced by this method on hard durable substrates may be used as masters for replicating said holograms in a suitable recording medium.
摘要:
A filamentary light source and condenser system provide one or more light beams for illuminating a frequency-encoded focussed image hologram, the light diffracted therefrom being decoded by a slit-type spatial filter and projected onto a viewing screen to display a full color reconstruction.