Abstract: A spatial light modulator in the form of a deformable mirror device (110) receives from a frame store (116) data which has been formatted by a data formatter (114) subsequent to gamma correction in a ROM look-up table (112). The DMD (110) displays different light levels by being ON for selected periods of a series of durations 4, 8, 16 . . . 1024 varying in proportion to a basic period multiplied by powers of two. The shortest duration 4 for which the DMD can be turned on is a multiple of the basic period, and the series includes additional durations 5, 6 and 7 in the series between the shortest displayable duration 4 and the next power of two 8. Durations 1, 2 and 3 of less than the shortest displayable duration can be displayed by adjusting the turn-on time of a proportion of the adjacent mirrors. The longest duration for which the mirror can be turned on can be employed twice.

Abstract: A method and apparatus for driving a display device including a matrix array of deflectable mirror devices is described. The deflectable mirror devices are divided into blocks of N rows. Selected groups of mirror devices within each block are loaded with single bit data in a cycle of loading operations During at least some of the loading operations, two series of reset cycles are used enabling one single bit cycle in one group to terminate and another single bit cycle in another group to commence within a single loading operation. Active bit data may be loaded and displayed in the otherwise unused time intervals between the active bits.

Abstract: The present invention is directed to a process for reducing the volume of low level radioactive and mixed waste to enable the waste to be more economically stored in a suitable repository, and for placing the waste into a form suitable for permanent disposal. The invention involves a process for preparing radioactive, hazardous, or mixed waste for storage by contacting the waste starting material containing at least one organic carbon-containing compound and at least one radioactive or hazardous waste component with nitric acid and phosphoric acid simultaneously at a contacting temperature in the range of about 140.degree. C. to about 210 .degree. C.

Abstract: A card is disclosed that incorporates a removable scratch-off coating to hide printed symbols. The card is constructed so that the scratch-off coating is selectively retained by the card, in the form of symbols, or as a background for symbols, when the scratch-off coating is removed. The selective retention of scratch-off coating material to the card is accomplished by incorporating into the card, between the substrate and the scratch-off coating, a clear release coat patterned to form symbols. When the scratch-off coating material is applied to the card during construction, it either adheres directly to the substrate in the form of symbols, or it adheres to the substrate in the background for the symbols, depending on how the release coat is applied. When a player rubs the scratch-off coating material, it releases from the release coat and remains adhered to the substrate to create either symbols or the background for symbols.

Abstract: An enclosure provided with an air supply system, an exhaust system, and controls for manipulating the flow, temperature, dewpoint and relative humidity of the air within the enclosure are disclosed. The present invention aims to achieve with these components a system for containing chemical contaminants created during processing of silicon wafers during the chemical/mechanical, polishing/planarization processes involved in creating those wafers. The system prevents drying of the slurry used to process wafers by controlling the relative humidity within the enclosure via a humidifier, sensors and a controller that dynamically reacts to changes within the enclosure atmosphere. Preventing slurry drying is critical to maintaining high wafer throughput by reducing gouging and scraping of wafers and also by reducing equipment down time needed to clean dried slurry.