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公开(公告)号：US06723474B2
公开(公告)日：2004-04-20
申请号：US09795442
申请日：2001-03-01
申请人： Junji Tomita , Fumio Yamagishi
发明人： Junji Tomita , Fumio Yamagishi
IPC分类号： G03F900
CPC分类号： G03F7/201 , G02B5/1857 , G03F7/0005
摘要： A method of fabricating a diffraction grating by utilizing a single substrate comprises the steps of forming a photosensitive material layer and a light transmission reducing film having a predetermined pattern integrally with each other on the substrate, exposing the photosensitive material layer by exposure irradiation light via the light transmission reducing film, and developing the photosensitive material layer after exposure. It is composed so that the direction of exposure and the direction of development are opposite to each other. It is possible to fabricate a diffraction grating in which each grating is formed on a predetermined substrate at a predetermined pitch and a root portion in a cross-section of each diffraction grating is constricted. In this way, it is possible to reduce or eliminate interfaces, so that the generation of noise light can be effectively suppressed and a diffraction grating having a high diffraction efficiency can be made.
摘要翻译： 通过利用单个基板制造衍射光栅的方法包括以下步骤：在基板上形成具有预定图案的感光材料层和相互一体的透光率降低膜，通过曝光照射光将光敏材料层经由 透光降低膜，曝光后显影感光材料层。 它的组成是使曝光方向和发展方向彼此相反。 可以制造衍射光栅，其中每个光栅以预定间距形成在预定基板上，并且每个衍射光栅的横截面中的根部被收缩。 以这种方式，可以减少或消除界面，从而可以有效地抑制噪声光的产生，并且可以制造具有高衍射效率的衍射光栅。
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公开(公告)号：US5109428A
公开(公告)日：1992-04-28
申请号：US446660
申请日：1989-12-06
CPC分类号： A61B5/1172 , G06K9/00087 , G07C9/00158
摘要： An apparatus used in fingerprint identification for extracting minutia data from fingerprint image data. An optical sensor unit optically produces a sequence of fingerprint image data during a single operation of pressing a fingerpad onto an inspection plate in a direction substantially transverse to the plate and with increasing pressure over a time interval. A data storing unit stores the produced fingerprint image data in the form of a sequence of fingerprint image data obtained during the single operation of pressing the fingerpad onto the inspection plate. The stored fingerprint image data is utilizable for identification of the fingerprint.
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公开(公告)号：US5088817A
公开(公告)日：1992-02-18
申请号：US437899
申请日：1989-11-17
CPC分类号： G06K9/00046 , A61B5/1172
摘要： An apparatus for detecting and identifying a biological object. A transparent plate has a first surface onto which a light beam is projected and a second surface onto which a biological object to be detected and identified is placed. The light beam projected toward the first plate surface is transmitted through the plate and toward the object on the second surface, from which the light beam is reflected and retransmitted through the plate toward and through the first surface thereof and received and detected by an optical detector. The detection of a biological object is confirmed by comparing the change of the wavelength characteristics of the reflected and detected light beam in a predetermined time sequence according to the object being first placed upon and then pressed upon the second surface of the transparent plate with respective, known such characteristics thereof.
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公开(公告)号：US4938550A
公开(公告)日：1990-07-03
申请号：US151616
申请日：1988-02-02
CPC分类号： G02B5/32 , G02B26/0808
摘要： A holographic deflection device having a tunable laser, and at least one hologram for deflecting light incident thereupon from the tunable laser, so that the deflection of the light can be controlled by a change of the wavelength of the beam from the tunable laser.
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公开(公告)号：US4647143A
公开(公告)日：1987-03-03
申请号：US596704
申请日：1984-04-04
申请人： Kozo Yamazaki , Fumio Yamagishi , Hiroyuki Ikeda , Hiroshi Watanuki , Mitsuharu Ishii , Ichiro Sebata , Takefumi Inagaki
发明人： Kozo Yamazaki , Fumio Yamagishi , Hiroyuki Ikeda , Hiroshi Watanuki , Mitsuharu Ishii , Ichiro Sebata , Takefumi Inagaki
CPC分类号： G06K7/10871
摘要： Light-beam scanning apparatus mainly used for a bar-code reader in a point-of-sale system to identify sold articles. The apparatus includes a light-beam emitting device, a hologram disk having a plurality of hologram segments with different diffraction characteristics mounted along its circumference and being rotated at a predetermined speed, and a deflecting device for directing the emitted light beam from the light-beam emitting device to one side of the hologram disk in a first direction. The scanning apparatus has a first mirror group including a plurality of mirrors placed in a second direction corresponding to the other side of the hologram disk, each of which mirrors is arranged to receive a diffracted light beam from a corresponding hologram segment, and a second mirror group including a plurality of mirrors, each of which mirrors is placed to receive a light beam reflected by a corresponding mirror of the first mirror group and to reflect the incident light beam to a predetermined space positioned in the first direction where an article attached with a bar-code label is moved. In the apparatus, a light path from the other side of the hologram disk to the predetermined space has a predetermined length to form a predetermined scanning light pattern in the space.
摘要翻译： 光束扫描装置主要用于销售点系统中的条形码阅读器，用于识别出售物品。 该装置包括光束发射装置，具有沿其圆周安装并以预定速度旋转的具有不同衍射特征的多个全息片段的全息图盘，以及用于引导来自光束的发射光束的偏转装置 发射器件沿着第一方向到达全息图盘的一侧。 该扫描装置具有第一反射镜组，该第一反射镜组包括放置在与全息图光盘的另一侧相对应的第二方向的多个反射镜，每个反射镜被配置为接收来自对应全息图部分的衍射光束，以及第二反射镜 其包括多个反射镜，每个反射镜被放置成接收由第一反射镜组的相应反射镜反射的光束，并将入射光束反射到位于第一方向上的预定空间， 条形码标签被移动。 在该装置中，从全息盘的另一侧到预定空间的光路具有预定的长度，以在该空间中形成预定的扫描光图案。
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