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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7227594 | Display device using optical modulator equipped with lens system having improved numerical aperture Disclosed herein is a display device using an optical modulator equipped with a lens system having an improved numerical aperture. The display device includes numerical aperture reducer for reducing a numeral aperture by causing +1st order diffracted light and corre... | 06/05/2007 |
| 7119936 | Speckle reduction for display system with electromechanical grating A display system (10) with reduced speckle has a light source (70) providing an illumination beam and a linear light modulator (85) having at least one linear array of light modulating devices for forming a modulated beam. The modulated beam has... | 10/10/2006 |
| 4679070 | Method and apparatus for enhancing magenta modulation of a light valve projector Improved signal modulating circuits for a light valve projector are disclosed which are capable of increasing the magenta efficiency of the projector. The projector has an input bar plate having slots, a deformable light modulating medium and an output ba... | 07/07/1987 |
| 4496969 | Light valve projection system with improved vertical resolution A light valve projection system is disclosed in which information is impressed on a light modulating fluid overlying a disk wherein incident light is modulated by the information and projected onto a viewing surface. The fluid layer includes a raster area... | 01/29/1985 |
| 4223354 | Phase corrected raster scanned light modulator and a variable frequency oscillator for effecting phase correction The present invention relates to a phase corrected raster scanned light modulator in which information modulated on a carrier is used to form a grating whose spatial frequency along the scanning line varies in accordance with the signal modulation frequen... | 09/16/1980 |
| 4110791 | Television projector system An optical image generation and projection system is disclosed as including light relay type image generator for transforming an invisible electronic signal into a visible amplitude modulated image having interferential contrasts on an oil layer and a lig... | 08/29/1978 |
| 4010321 | Light modulating device using Schlieren lens system An electroosmotically movable liquid film is caused to vary its thickness by local loop currents produced by a charge pattern representing an image developed across the film surface, thus forming local gradients which are proportional to the amount of dep... | 03/01/1977 |
