| 摘要 |
Method and apparatus (10) for a multi-application, laserarray-based image system are disclosed. The preferred embodiment of the invention utilizes three linear laser arrays (104, 106, 108). Each linear array generates multiple (N>1) parallel output beamlets at one of the three primary colors (red, green, blue) (110, 112, 114). The corresponding 1 to N output beamlets of the three linear arrays, each individually modulated in luminance according to a specific encoding scheme representing the video image to be produced on the viewing screen (400), are combined spatially to form a single white light linear array source (100). Through a projection/scanner optical system, the N output beamlets of the white light source are simultaneously directed to, and swept horizontally across a distant viewing screen (400), resulting in a swath of N lines of a graphic video image. By producing M contiguous swaths vertically down the viewing screen, a full image of MxN lines is produced. The red, green, and blue linear laser arrays may consist of arrays of semiconductor laser diodes made of suitable semiconductor materials so as to directly emit radiation at wavelengths corresponding to red, green, and blue colors, respectively. Alternatively, the red, green and blue color arrays may be formed by arrays of semiconductor laser diodes emitting radiation at twice the desired red, green and blue wavelengths, whose radiation is coupled to arrays of second harmonic generation crystal elements. In the present invention, the simultaneous writing of N>1 lines of graphic video information (instead of N = 1 as in conventional laser projection systems) enables significant performance improvements in the optical projection/image-forming subsystems, the video luminance and chrominance encoding schemes, and the video information processing electronics.
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