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1. 发明授权

US5498868A Optical data reader capable of quickly changing a condensing position of a light beam 失效
标题翻译：能够快速改变光束聚光位置的光学数据读取器
公开(公告)号：US5498868A
公开(公告)日：1996-03-12
申请号：US299365
申请日：1994-09-01
申请人： Hideaki Nishikawa , Tukasa Koumura , Michio Hisanaga
发明人： Hideaki Nishikawa , Tukasa Koumura , Michio Hisanaga
IPC分类号： G02B3/14 , G02B26/10 , G06K7/10 , H01J3/14
CPC分类号： G02B3/14 , G02B26/105 , G06K7/10702 , G06K7/10811
摘要： An optical data reader including a device for producing a light beam, and a device for changing a condensing position of the light beams before the light beam is reflected from a target such as a bar code. The device for changing the condensing position is either a variable focus lens or mirror, each adapted to change the curvature of the surface of the lens or mirror in order to move the condensing position cyclically and continuously. The variable focus mirror changes the shape of its reflecting surface in response to electrical signals from a driving circuit. Excess pressure within the mirror caused by the mirror surface being attracted inwards is expelled through intake/outlet ports formed in the drive electrode. The variable focus lens alters the focal length of the lens each time the curvature of the surface thereof is changed. Preferably, the curvature of the lens surface is changed by increasing fluid pressure within the lens, while the curvature of the variable focus mirror is electrically driven. Either the variable focus lens or mirror is disposed in the optical path between the light source and the target. The light source is usually a laser or laser diode.
摘要翻译：一种光学数据读取器，包括用于产生光束的装置，以及用于在光束从诸如条形码的目标反射之前改变光束的聚光位置的装置。用于改变冷凝位置的装置是可变焦距透镜或反射镜，每一个适于改变透镜或反射镜表面的曲率，以循环地和连续地移动聚光位置。可变焦距反射镜响应于来自驱动电路的电信号改变其反射表面的形状。由镜面被向内吸引的反射镜内的过大的压力通过形成在驱动电极中的进/出口被排出。可变焦距透镜每当其表面的曲率改变时改变透镜的焦距。优选地，通过增加透镜内的流体压力来改变透镜表面的曲率，同时可变焦距反射镜的曲率被电驱动。可变焦距透镜或镜子都设置在光源和目标之间的光路中。光源通常是激光或激光二极管。

2. 发明授权

US5574598A Varifocal lens 失效
标题翻译：变焦镜头
公开(公告)号：US5574598A
公开(公告)日：1996-11-12
申请号：US286560
申请日：1994-08-05
申请人： Tukasa Koumura , Michio Hisanaga , Tadashi Hattori
发明人： Tukasa Koumura , Michio Hisanaga , Tadashi Hattori
IPC分类号： G02B3/14 , G02B1/06 , G02B3/12 , G02B15/14
CPC分类号： G02B3/14
摘要： A varifocal lens whose variable focal length can be controlled by, for example, an electric signal, and suitable for use in bar code readers, etc. A varifocal lens comprises a first pressure chamber defined between a glass substrate and a transparent elastic film. The transparent elastic film is faced to the surface of the planar glass substrate having parallel surfaces with a spacer incorporated therebetween to provide the first pressure chamber. A pump is provided adjacent to the first pressure chamber via a communicating path for charging an operating liquid to the first pressure chamber from a second pressure chamber of the pump by electrically deforming the transparent elastic film to form a lens having a variable focal length. The transparent elastic film has a film thickness distribution as such to provide a spherical plane in the central portion thereof and a third order curved surface in the periphery thereof. In this manner, a lens free of aberration can be obtained when a liquid is fed into the first pressure chamber to form a spherical plane.
摘要翻译：可变焦距可以通过例如电信号控制并且适用于条形码读取器等的变焦透镜。变焦透镜包括限定在玻璃基板和透明弹性膜之间的第一压力室。透明弹性膜面对具有平行表面的平面玻璃基板的表面，间隔件结合在其中以提供第一压力室。通过用于通过使透明弹性膜电动变形以形成具有可变焦距的透镜从泵的第二压力室向第一压力室充电操作液体的连通路径，设置有与第一压力室相邻的泵。透明弹性膜的膜厚分布在其中央部分形成球面并在其周边形成三阶曲面。以这种方式，当液体被供给到第一压力室中以形成球面时，可以获得没有像差的透镜。

3. 发明授权

US5456798A Methods and apparatus for processing curved surface 失效
标题翻译：曲面加工方法及装置
公开(公告)号：US5456798A
公开(公告)日：1995-10-10
申请号：US354775
申请日：1994-12-12
申请人： Tukasa Koumura , Kiyoshi Saeki
发明人： Tukasa Koumura , Kiyoshi Saeki
IPC分类号： G02B27/46 , B81C99/00 , G02B3/00 , G03F1/00 , G03F7/20 , H01L21/30 , H01L21/306 , B44C1/22 , C03C15/00
CPC分类号： G02B3/00 , G03F7/703 , G03F7/70416
摘要： In order to perform micromachining of a precision smooth curved surface on a workpiece, light emitted from a mercury lamp is transmitted through a photomask, Fourier transform lens, aperture material, and inverse Fourier transform lens, after which it is beamed upon the workpiece material to be surface-machined and a positive photoresist layer which is formed on the surface of the workpiece material. By means of the foregoing structure, the high-frequency optical components which are included in the light emitted from the mercury lamp and which may cause roughening of curved-surface machining are made to converge at a location away from the optical axis and are removed by means of an aperture provided thereupon, with the only the residual low-frequency optical components being transmitted through the aperture, and so the intensity profile of the light which is beamed upon the positive photoresist layer is smoothed and a smooth-surface curved surface is transcribed to the positive photoresist layer.
摘要翻译：为了在工件上进行精密光滑曲面的微机械加工，从水银灯发出的光通过光掩模，傅立叶变换透镜，孔径材料和傅立叶逆变换透镜传输，然后将其发射到工件材料上被表面加工和形成在工件材料表面上的正性光致抗蚀剂层。通过上述结构，将包含在从汞灯发出的光中并且可能导致曲面加工的粗糙化的高频光学部件在远离光轴的位置处会聚，并且被除去设置在其上的孔的装置，只剩余的低频光学部件通过孔径传播，因此光束在正性光致抗蚀剂层上的光的强度分布被平滑化并且光滑表面曲面被转录到正性光致抗蚀剂层。

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