摘要:
A method and apparatus for encapsulating optical elements, particularly dichromated gelatin (DGC) holographic optical elements (HOEs), exhibits a very high degree of environmental integrity. In broad terms, the optical element is disposed between opposing plates, and a metal seal soldered to the edge(s) of the plates to seal the optical element therewithin. In the preferred embodiment, the metalization includes chrome and nickel, or alloys thereof, followed by gold or platinum. The metallization is preferably applied using a low-temperature process such as vacuum deposition or sputtering. The metal seal may be in the form of a foil or wire. One or both of the plates are compatible with wavelengths of interest, and the technique may be used in transmissive and reflective configurations.
摘要:
An online system for permitting users in a data network to manage inventories of their collectibles (including antiques) includes a database of collectibles, user inventory files, user information files, a database of needed items and items available for sale, and a server-based task for managing and searching the database of needed items and items available for sale. The database of collectibles includes object classes indexed by primary classes and subclasses, and user inventory files storing inventories of instances of the object classes, including instances that each user has, instances that each user would like to sell, and instances that each user would like to buy. Users may access their respective inventories by inspecting, editing, and adding the instances to the user inventories; obtaining valuations of instances in their inventories; and insuring instances in their inventories. The server-based task finds buy-sell opportunities between the users when one user has an instance of at least one object class that said one user would like to buy and another user has an instance of said at least one object class that said another user would like to sell.