| 摘要 |
PURPOSE:To obtain linear light of uniform luminance and reduce the size of a printer optical write device by forming light-reflecting film on parts of the aperture section of a fluorescent light used to supply optical energy to a microlight shutter, in which linear light is not used, and perpendicularly curving these parts. CONSTITUTION:An aperture-type monochromatic light fluorescent lamp has curved sections 6 each coated with a silver film working as a light-reflecting film and formed by silver mirror reaction. The tube length, the tube diameter and the aperture width of the lamp are 30cm, 16mm. and 3mm. respectively. In such a fluorescent lamp, the luminance of the area 10cm apart from the center is 95% (conventional percentage, 85%) of the maximum luminance of the area around the center of the tube. Accordingly, it is possible to constitute a very compact optical-signal-producing unit for a liquid-crystal optical write printer in which the fluorescent lamp is installed in such a manner as to be shown in the figure. |
