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公开(公告)号：US6091544A
公开(公告)日：2000-07-18
申请号：US847316
申请日：1997-04-23
CPC分类号： G02B5/32 , G02B26/106 , G03H1/0005
摘要： A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as optical lenses or a mirror having curvature, and capable of compensating for disadvantages including scanning beam thickening and variation, failure of a rotatable hologram to rotate at a constant velocity, displacement of a scanning beam position in the scanning direction and the cross scanning direction due to a mode hop of a wavelength of a semiconductor laser, and deviation of a base of rotatable hologram from a parallel state. These disadvantages are detrimental to efforts for increasing the resolution of a hologram scanner and lowering the cost thereof. The light beam scanning apparatus includes at least two holograms with one being fixed and the other rotatable, where a rate of variation of a direction cosine of an object wave recorded on the fixed plate and taken in a scanning direction of the light on the scanning surface is configured to be different from a rate of variation of a direction cosine of the object wave recorded on the fixed plate and taken in a cross scanning direction of the light on the scanning surface, and focal distances of a light incident on said rotatable hologram are configured to be different in the scanning direction and in the cross scanning direction.
摘要翻译： 仅利用大规模生产的全息图的高分辨率光束扫描装置，而不是利用诸如光学透镜或具有曲率的反射镜等辅助光学系统，并且能够补偿包括扫描光束增厚和变化的缺点，可旋转全息图的故障 以恒定速度旋转，由于半导体激光器的波长的模式跳跃而导致的扫描光束位置在扫描方向和横扫描方向上的位移以及可旋转全息图的基底与平行状态的偏离。 这些缺点对于增加全息扫描仪的分辨率并降低其成本的努力是有害的。 光束扫描装置包括至少两个全息图，一个是固定的，另一个是可旋转的，其中记录在固定板上的物体波的方向余弦的变化率在扫描表面上的光的扫描方向上 被配置为不同于记录在固定板上并沿扫描表面上的光的横扫描方向拍摄的物体波的方向余弦变化率，并且入射在所述可旋转全息图上的光的焦距为 被配置为在扫描方向和横扫描方向上不同。
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公开(公告)号：US6020984A
公开(公告)日：2000-02-01
申请号：US838987
申请日：1997-04-23
CPC分类号： G02B5/32 , G02B26/106 , G03H1/0005
摘要： A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as an optical lens or a mirror having curvature, and capable of compensating for disadvantages including scanning beam thickening and variation, failure of a rotatable hologram to rotate at a constant velocity, displacement of a scanning beam position in the scanning direction and the cross scanning direction due to a mode hop of a wavelength of a semiconductor laser, and deviation of a base of a rotatable hologram from a parallel state, which disadvantages are detrimental to efforts for increasing the resolution of a hologram scanner and lowering the cost thereof, the light-beam scanning apparatus being characterized in that provided in the rotatable hologram (1) and the fixed plate (2) arediffraction gratings for minimizing:either a sum total of values obtained by weighting:a square of an optical path length difference between a) an optical path of a light flux measured along a principal axis MA of a light beam incident on and diffracted by a diffraction grating (1a) of a rotatable hologram (1), and incident on and diffracted by a diffraction grating (2a) of a fixed plate (2) so as to conduct a scanning and converging on a scanning point k on an image formation surface (4), and b) an optical path of a light flux measured along a marginal ray M1 distanced from the principal axis MA; or an absolute value of the optical path difference thereof,the weighting being conducted at every scanning position covering an entire range of the image formation surface (4),or a sum total of values obtained by weighting:a square of a sum obtained by adding: an amount of displacement of a light beam convergent on a scanning point k on the image formation surface (4), which displacement is measured along the marginal ray M1 distanced from the principal axis MA of an incident reconstructing light flux with respect to the principal axis MA of a phase of the diffraction grating (1a) of the rotatable hologram (1); to an amount of displacement of the same light, which displacement is measured with respect to the principal axis MA of a phase recorded on the diffraction grating (2a) when the light flux is incident on the fixed plate (2); or by weighting an absolute value of the sum,the weighting being conducted at every scanning position covering an entire range of an image formation surface.
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公开(公告)号：US5995250A
公开(公告)日：1999-11-30
申请号：US847315
申请日：1997-04-23
CPC分类号： G02B5/32 , G02B26/106 , G03H1/0005
摘要： A method of manufacturing a fixed hologram plate of a light-beam scanning apparatus for diffracting a light incident from a light source portion by a rotatable hologram, scanning by the diffracted light through the rotation of the rotatable hologram, diffracting the resulting light by the fixed hologram plate, and for conducting a light-beam scanning on a scanning surface. The method includes the steps of preparing an interference fringe distribution of the fixed hologram plate by two waves: a first wave having a spherical aberration, a transverse aberration of the first wave is in the Y direction, the transverse wave including an astigmatism and a coma; and a second wave having a spherical aberration and astigmatism, and having a wavelength different from a wavelength of a reconstructing wave that is selected to minimize distortion, wherein a transverse aberration of the second wave is in the X direction.
摘要翻译： 一种制造光束扫描装置的固定全息板的方法，用于通过可旋转的全息图衍射从光源部分入射的光，通过可旋转全息图的旋转被衍射光扫描，将所得到的光衍射成固定的 全息图板，并用于在扫描表面上进行光束扫描。 该方法包括以下步骤：通过两波制备固定全息图板的干涉条纹分布：具有球面像差的第一波，第一波的横向像差在Y方向上，横波包括散光和彗差 ; 以及具有球面像差和像散的第二波，并且具有与被选择为使失真最小化的重构波的波长不同的波长，其中第二波的横向像差处于X方向。
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公开(公告)号：US5295004A
公开(公告)日：1994-03-15
申请号：US972520
申请日：1992-11-06
申请人： Shinya Hasegawa , Fumio Yamagishi , Youji Houki , Shigetake Iwata , Shigeo Kayashima , Satoshi Maeda
发明人： Shinya Hasegawa , Fumio Yamagishi , Youji Houki , Shigetake Iwata , Shigeo Kayashima , Satoshi Maeda
CPC分类号： G02B5/32 , G02B26/106
摘要： An optical beam scanning apparatus includes one rotatable hologram which is rotatable about an axis, and at least two laser beam sources which emit laser beams. The rotatable hologram is provided with at least two hologram areas whose number corresponds to the number of the laser beam sources, so that the laser beams emitted from the respective laser beam sources are made incident upon the respective hologram areas. Each of the hologram areas is provided with a plurality of hologram facets which are concentrically arranged with respect to the axis of rotation of the rotatable hologram to emit laser beams of the same F number. The hologram areas having different numbers of hologram facets having different F numbers.
摘要翻译： 光束扫描装置包括可围绕轴线旋转的一个可旋转的全息图以及发射激光束的至少两个激光束源。 可旋转全息图设置有至少两个全息区域，其数量对应于激光束源的数量，使得从各个激光束源发射的激光束入射到各个全息图区域。 每个全息图区域设置有多个全息面，其相对于可旋转全息图的旋转轴线同心布置以发射相同F数的激光束。 全息图区域具有不同数量的具有不同F数的全息图面。
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公开(公告)号：US5892597A
公开(公告)日：1999-04-06
申请号：US877581
申请日：1997-06-17
CPC分类号： G03H1/30 , G02B5/32 , G03H2001/0482 , G03H2001/0491
摘要： A holographic recording apparatus includes first and second light sources for respectively generating first and second light beams. A mask is located in front of a hologram recording material and has an aperture. Interference fringes are recorded in a hologram cell on the hologram recording material corresponding to the aperture. A movement mechanism supports the hologram recording material masked by the mask and relatively moves the hologram recording material with respect to the mask in predetermined directions so that an interference pattern is formed in an area on the hologram recording material. A spatial frequency changing mechanism changes incident angles of the first and second light beams with respect to the mask.
摘要翻译： 全息记录装置包括用于分别产生第一和第二光束的第一和第二光源。 掩模位于全息记录材料的前面并具有孔。 干涉条纹记录在对应于孔的全息图记录材料上的全息图单元中。 移动机构支持由掩模掩蔽的全息图记录材料，并相对于掩模在预定方向相对移动全息图记录材料，从而在全息图记录材料上的区域中形成干涉图案。 空间频率改变机构改变第一和第二光束相对于掩模的入射角度。
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公开(公告)号：US6020999A
公开(公告)日：2000-02-01
申请号：US838937
申请日：1997-04-23
CPC分类号： G02B5/32 , G02B26/106 , G03H1/0005
摘要： A high-resolution light-beam scanning apparatus utilizing only mass-producable holograms instead of utilizing auxiliary optical systems such as optical lenses or a mirror having curvature. The light beam scanning apparatus is capable of compensating for disadvantages including scanning beam thickening and variation, failure of a rotatable hologram to rotate at a constant velocity, displacement of a scanning beam position in the scanning direction and the cross scanning direction due to a mode hop of a wavelength of a semiconductor laser, and deviation of a base of a rotatable hologram from a parallel state, which disadvantages are detrimental to efforts for increasing the resolution of a hologram scanner and lowering the cost thereof. The light beam scanning apparatus incudes at least two holograms with an optical path length difference .DELTA..PHI.
摘要翻译： 仅使用可批量生产的全息图而不是使用诸如光学透镜或具有曲率的反射镜的辅助光学系统的高分辨率光束扫描装置。 光束扫描装置能够补偿扫描光束增厚和变化，可旋转全息图以恒定速度旋转的故障，扫描方向上的扫描光束位置的偏移和由于模式跳跃而产生的横向扫描方向的缺点 半导体激光器的波长以及可旋转全息图的基底与平行状态的偏差，这些缺点对于增加全息扫描仪的分辨率和降低其成本的努力是有害的。 光束扫描装置包含光路长度差DELTA PHI <（λ2 / Dλ）的至少两个全息图，其中<常数小于0.5。 路径长度根据上述方程与在光表面的中心处的波长λ相关，并且在光表面的中心处从波长+558测量的波长位移DELTAλλ。
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公开(公告)号：US5550655A
公开(公告)日：1996-08-27
申请号：US232344
申请日：1994-04-22
CPC分类号： G02B26/106
摘要： A laser beam passes through two holograms or through a hologram twice to reduce the ratio .lambda./d so that P-polarized light, as well as S-polarized light, can be diffracted with high diffraction efficiency and uses a hologram or holograms formed on a base plate and facilitates the separation of a stamper from the base plate in producing replicas of the hologram. A laser beam (5) passes through two holograms formed on a transparent base plate or through a hologram formed on a transparent base plate twice. The ratio .lambda./d, where .lambda. is the wavelength of the laser beam and d is the grating constant of the hologram, is in the range of 0.4 to 1.1.
摘要翻译： 激光束通过两个全息图或通过全息图两次以减小λ/ d比，使得P偏振光以及S偏振光可以以高衍射效率被衍射，并且使用形成在全息图上的全息图或全息图 并且有助于在制造全息图的副本时将压模与基板分离。 激光束（5）通过形成在透明基板上的两个全息图或通过形成在透明基板上的全息图两次。 比率λ/ d，其中λ是激光束的波长，d是全息图的光栅常数，在0.4至1.1的范围内。
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8.发明授权
公开(公告)号：US6115012A
公开(公告)日：2000-09-05
申请号：US569422
申请日：1995-12-06
CPC分类号： G02F1/292 , G02F1/13306 , G02F1/139
摘要： An optical deflection apparatus includes a pair of transparent electrodes, a liquid crystal layer, put between the transparent electrodes, in which stripes are formed at intervals based on a waveform of a driving signal supplied to the pair of transparent electrodes, the stripes functioning as a grating by which incident light is deflected in a deflecting direction, and a driving unit for supplying to the pair of transparent electrodes the driving signal having a waveform by which the deflecting direction changes with time.
摘要翻译： 光学偏转装置包括一对透明电极，位于透明电极之间的液晶层，其中基于提供给该对透明电极的驱动信号的波形间隔形成条纹，条纹用作 入射光沿偏转方向偏转的光栅;以及用于向一对透明电极提供具有偏转方向随时间变化的波形的驱动信号的驱动单元。
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9.发明授权
公开(公告)号：US5973837A
公开(公告)日：1999-10-26
申请号：US839079
申请日：1997-04-23
CPC分类号： G02B5/32 , G02B26/106 , G03H1/0005
摘要： A light-beam scanning apparatus including a rotatable hologram and a fixed plate, which are provided with diffraction gratings to minimize: either a sum total of values obtained by weighting where a square of an optical path length difference between an optical path of a light flux measured along a principal axis of a light beam incident on and diffracted by a diffraction grating of a rotatable hologram, and incident on and diffracted by a diffraction grating of a fixed plate so as to conduct a scanning and converging on a scanning point on an image formation surface, and an optical path of a light flux measured along a marginal ray distanced from the principal axis; or an absolute value of the optical path difference thereof. Another sum total obtained by weighting requiring minimization is: a square of a sum obtained by adding: an amount of displacement of a light beam convergent on a scanning point on the image formation surface, which displacement is measured along the marginal ray distanced from the principal axis of an incident reconstructing light flux with respect to the principal axis of a phase of the diffraction grating of the rotatable hologram to an amount of displacement of the same light, the displacement measured with respect to the principal axis of a phase recorded on the diffraction grating when the light flux is incident on the fixed plate; or by weighting an absolute value of the sum over every scanning position of the formation surface.
摘要翻译： 一种包括可旋转全息图和固定板的光束扫描装置，其设置有衍射光栅，以最小化：通过加权获得的值的总和，其中光通量的光路之间的光程长度差的平方 沿着入射到可旋转全息图的衍射光栅并由衍射光栅衍射的光束的主轴测量，并由固定板的衍射光栅入射并衍射，以便对图像上的扫描点进行扫描和会聚 以及沿着与主轴相距的边缘射线测量的光通量的光路; 或其光程差的绝对值。 通过加权要求最小化获得的另一个总和是：通过将在会聚在图像形成表面上的扫描点上的光束的位移量相加获得的和的平方，该位移沿着与主体相距的边缘光线测量 将相对于可旋转全息图的衍射光栅的相位的主轴的光束重建为相同光的位移量的入射轴，相对于记录在衍射上的相的主轴测量的位移 当光束入射到固定板上时光栅; 或者通过对地层表面的每个扫描位置的和的绝对值加权。
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公开(公告)号：US5900955A
公开(公告)日：1999-05-04
申请号：US861639
申请日：1997-05-22
CPC分类号： G02B5/1876 , G02B26/12
摘要： An optical scanning system includes a laser source, a deflector deflecting a laser beam emitted from the laser source, and at least two hologram elements located between the deflector and an image forming member.
摘要翻译： 光学扫描系统包括激光源，偏转从激光源发射的激光束的偏转器和位于偏转器和图像形成部件之间的至少两个全息元件。
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