摘要:
A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
摘要:
A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
摘要:
An image reproducing apparatus reproduces a still picture recorded on a silver-halide film and a moving picture recorded on a video tape. The image reproducing apparatus also reproduces simultaneous shooting information recorded on both the film and the video tape. The image reproducing apparatus has a controller which controls reproduction of the pictures recorded on the film and the video tape in accordance with the simultaneous shooting information.
摘要:
A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 54.5 to 59.5 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 3 to 12 wt % of Li2O.
摘要翻译:用于记录盘基片的玻璃陶瓷组合物基本上以氧化物的重量百分数表示,为54.5至59.5重量%的SiO 2,10至30重量%的Al 2 O 3,10至30重量%的MgO, 和3至12重量%的Li 2 O。
摘要:
A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 50.5 to 56 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 4.2 to 10.6 wt % of TiO2.
摘要翻译:用于记录盘基片的玻璃陶瓷组合物基本上以氧化物的重量百分数表示,SiO 2为50.5至56重量%,Al 2 O 3为10至30重量%,MgO为10至30重量% 和4.2〜10.6wt%的TiO 2。
摘要:
A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 47.5 to 52.5 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 6.2 to 7.8 wt % of TiO2.
摘要翻译:用于记录盘基片的玻璃陶瓷组合物基本上以氧化物的重量百分数表示,为47.5至52.5重量%的SiO 2,10至30重量%的Al 2 O 3,10至30重量%的MgO, 和6.2〜7.8重量%的TiO 2。
摘要:
A glass ceramics composition for recording disk substrate consists essentially, expressed in terms of weight percent on the oxide basis, of from 65 to 80 wt % of SiO2, from 3 to 15 wt % of Al2O3, from 3 to 15 wt % of Li2O, from 0.2 to 5 wt % of P2O5, and from 0.1 to 0.8 wt % of ZrO2.
摘要翻译:用于记录圆盘基材的玻璃陶瓷组合物基本上以氧化物的重量百分数表示,为65至80重量%的SiO 2,3至15重量%的Al 2 O 3,3至15重量%的Li 2 O, 0.2〜5重量%的P 2 O 5和0.1〜0.8重量%的ZrO 2。
摘要:
A surface illuminating device is provided with a light source, a light introducing plate lying in a plane passing the light source, a first light diffusing plate arranged on a top surface of the light introducing plate, and a second light diffusing plate arranged on a bottom surface of the light introducing plate. The light introducing plate includes a first section arranged with the first light diffusing plate, and a second section arranged with the second light diffusing plate. The first and second sections each are formed with serrations in a surface opposite to a surface arranged with their respective light diffusing plate.
摘要:
A zoom lens system is provided with, from the object side, a first lens unit having a negative optical power, a second lens unit having a positive optical power, a third lens unit having a negative optical power, and a condenser lens unit having a positive optical power. In this zoom lens system, zooming is performed by varying the distances between the first, the second, the third lens unit, and the condenser lens unit. Additionally, this zoom lens system fulfills the condition below:-1.5
摘要:
A relay lens system which may be used with, e.g., a video camera or still video camera so that these video cameras can use, as the image forming lens, various preexisting interchangeable image forming lenses originally designed for single lens reflex cameras. The image forming lenses which form a first image can have various exit pupils. The entry pupil of the relay lens system can be changed in accordance with each particular exit pupil by selecting one from a plurality of apertures or by a movable aperture. Consequently, a second image can be formed that reproduces the first image while maintaining good quality.