公开(公告)号：US5212501A

公开(公告)日：1993-05-18

申请号：US875977

申请日：1992-04-29

申请人： Hiromu Nakamura ,  Akiyoshi Hamada ,  Satoru Ono ,  Masanori Murakami ,  Toshio Naiki ,  Kunihiko Omura ,  Masahito Niikawa

发明人： Hiromu Nakamura ,  Akiyoshi Hamada ,  Satoru Ono ,  Masanori Murakami ,  Toshio Naiki ,  Kunihiko Omura ,  Masahito Niikawa

IPC分类号： G02B5/18 ,  G02B26/12 ,  G06K15/12

CPC分类号： G06K15/1219 ,  G02B26/124 ,  G02B5/1876 ,  G06K15/1214

摘要： An image recording apparatus wherein a laser diode which is disposed on a focal point of a micro Fresnel lens emits a laser beam and the laser beam is collimated by the Fresnel lens and scanned on a photosensitive drum by a polygonal mirror and an f.theta. optical system. A change in temperature of the laser diode does not result in such serious defocus as to cause practical problems.

摘要翻译： 一种图像记录装置，其中设置在微型菲涅耳透镜的焦点上的激光二极管发射激光束，并且该激光束被菲涅尔透镜准直并且通过多面镜和fθ光学系统在感光鼓上扫描 。 激光二极管的温度变化不会导致如此严重的散焦，导致实际问题。

公开(公告)号：US5294945A

公开(公告)日：1994-03-15

申请号：US66504

申请日：1993-05-24

申请人： Kunihiko Omura ,  Akiyoshi Hamada ,  Satoru Ono ,  Hiromu Nakamura

发明人： Kunihiko Omura ,  Akiyoshi Hamada ,  Satoru Ono ,  Hiromu Nakamura

IPC分类号： B41J2/44 ,  B41J2/47 ,  G02B26/10 ,  H04N1/053 ,  H04N1/113 ,  H04N1/12 ,  H04N1/23 ,  B41J2/435 ,  H04N1/21

CPC分类号： H04N1/053 ,  B41J2/471 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0471

摘要： A laser source unit in which a laser diode is located at a focal point of a Fresnel lens using refraction and diffraction. The laser diode emits a laser beam in accordance with a control signal generated by a driving circuit. The laser diode is driven such that defocus on an image surface caused by a rise in the temperature of the laser diode can be kept in a tolerable degree.

摘要翻译： 激光源单元，其中激光二极管使用折射和衍射位于菲涅尔透镜的焦点处。 激光二极管根据由驱动电路产生的控制信号发射激光束。 激光二极管被驱动，使得由激光二极管的温度升高引起的图像上的散焦可以保持在可容许的程度。

公开(公告)号：US5926306A

公开(公告)日：1999-07-20

申请号：US948852

申请日：1997-10-10

申请人： Hiromu Nakamura ,  Toshio Naiki ,  Etsuko Shibata ,  Satoru Ono

发明人： Hiromu Nakamura ,  Toshio Naiki ,  Etsuko Shibata ,  Satoru Ono

IPC分类号： G02B13/00 ,  G02B26/12 ,  G02B26/08

CPC分类号： G02B26/125 ,  G02B13/0005

摘要： A scanning apparatus has a luminous flux deflector and a single f.theta. lens. The deflector deflects a convergent luminous flux on a scanned surface at a uniform angular velocity. The f.theta. lens is arranged between the deflector and the scanned surface. The f.theta. lens is bi-convex in a main scanning direction and is made of a material having a refractive index of at most 1.6. One surface of the f.theta. lens in a main scanning direction is so curved that a radius of curvature in the main scanning direction A decreases as an angle of view in the main scanning direction increases.

摘要翻译： 扫描装置具有光束偏转器和单个θθ透镜。 偏转器以均匀的角速度偏转扫描表面上的会聚光束。 fθ透镜布置在偏转器和扫描表面之间。 fθ透镜在主扫描方向上是双凸的，并且由折射率至多为1.6的材料制成。 fθ透镜在主扫描方向上的一个表面是如此弯曲的，使得主扫描方向A上的曲率半径随主扫描方向的视角增加而减小。

公开(公告)号：US5721631A

公开(公告)日：1998-02-24

申请号：US620103

申请日：1996-03-21

申请人： Hiromu Nakamura ,  Toshio Naiki ,  Etsuko Shibata ,  Satoru Ono

发明人： Hiromu Nakamura ,  Toshio Naiki ,  Etsuko Shibata ,  Satoru Ono

IPC分类号： G02B13/00 ,  G02B26/12 ,  G02B26/08

CPC分类号： G02B26/125 ,  G02B13/0005

摘要： A scanning apparatus has a luminous flux deflector and a single f.theta. lens. The deflector deflects a convergent luminous flux on a scanned surface at a uniform angular velocity. The f.theta. lens is arranged between the deflector and the scanned surface. The f.theta. lens is bi-convex in a main scanning direction and is made of a material having a refractive index of at most 1.6. One surface of the f.theta. lens in a main scanning direction is so curved that a radius of curvature in the main scanning direction decreases as an angle of view in the main scanning direction increases.

公开(公告)号：US5563729A

公开(公告)日：1996-10-08

申请号：US296020

申请日：1994-08-25

申请人： Hiromu Nakamura ,  Toshio Naiki ,  Etsuko Shibata ,  Satoru Ono

发明人： Hiromu Nakamura ,  Toshio Naiki ,  Etsuko Shibata ,  Satoru Ono

IPC分类号： G02B13/00 ,  G02B26/12 ,  G02B26/08

CPC分类号： G02B26/125 ,  G02B13/0005

摘要： A scanning apparatus has a luminous flux deflector and a single f.theta. lens. The deflector deflects a convergent luminous flux on a scanned surface at a uniform angular velocity. The f.theta. lens is arranged between the deflector and the scanned surface. The f.theta. lens is bi-convex in a main scanning direction and is made of a material having a refractive index of at most 1.6. One surface of the f.theta. lens in a main scanning direction is so curved that a radius of curvature in the main scanning direction decreases as an angle of view in the main scanning direction increases.

摘要翻译： 扫描装置具有光束偏转器和单个θθ透镜。 偏转器以均匀的角速度偏转扫描表面上的会聚光束。 fθ透镜布置在偏转器和扫描表面之间。 fθ透镜在主扫描方向上是双凸的，并且由折射率至多为1.6的材料制成。 fθ透镜在主扫描方向上的一个表面是如此弯曲的，使得主扫描方向上的曲率半径随主扫描方向的视角而增大。

公开(公告)号：US5530579A

公开(公告)日：1996-06-25

申请号：US147723

申请日：1993-11-04

申请人： Hiromu Nakamura ,  Satoru Ono ,  Akiyoshi Hamada

发明人： Hiromu Nakamura ,  Satoru Ono ,  Akiyoshi Hamada

IPC分类号： G02B26/10 ,  G02B26/12 ,  G02B27/00 ,  G02B26/08

CPC分类号： G02B26/125 ,  G02B27/0031

摘要： A laser beam optical scanning device which has a laser diode, a collimator lens, a cylindrical lens, a polygonal scanner and an f .theta. lens. The polygonal scanner is made of resin, and when the polygonal scanner is driven to rotate, the reflective facets of the polygonal scanner are distorted to be concave or convex because of a centrifugal force. If the reflective facets are distorted to be concave with rotation of the polygonal scanner, the image surface shifts along the optical axis toward the polygonal scanner. Therefore, in this case, the elements of the optical scanning device are positioned such that the image surface is located behind a light receiving surface while the polygonal scanner is stationary and is located nearer to the light receiving surface while the polygonal scanner is rotating.

摘要翻译： 一种具有激光二极管，准直透镜，柱面透镜，多边形扫描仪和fθ透镜的激光束光学扫描装置。 多边形扫描器由树脂制成，并且当多边形扫描器被驱动旋转时，由于离心力，多边形扫描仪的反射小面变形为凹形或凸形。 如果反射小面通过多边形扫描器的旋转而变形成凹入，则图像表面沿着光轴向多边形扫描器移动。 因此，在这种情况下，光扫描装置的元件被定位成使得图像表面位于光接收表面的后面，而多边形扫描器是静止的并且在多边形扫描器旋转的同时位于更靠近受光面的位置。

公开(公告)号：US5680244A

公开(公告)日：1997-10-21

申请号：US354604

申请日：1994-12-13

申请人： Satoru Ono ,  Toshio Naiki

发明人： Satoru Ono ,  Toshio Naiki

IPC分类号： G02B26/10 ,  G02B13/00 ,  G02B13/18 ,  G02B26/12 ,  G02B26/08

CPC分类号： G02B26/125

摘要： A scanning optical system has a deflector and a scanning lens. A convergent beam is deflected at a uniform angular velocity by the deflector. The scanning lens forms the scanned beam into an image on a scanned surface to scan the surface substantially at a uniform velocity. The scanning lens includes from the side of the deflector a negative lens element and at least one more lens element. The convergent beam is incident on a surface of the deflector which faces the deflector. The scanning lens fulfills predetermined conditions.

摘要翻译： 扫描光学系统具有偏转器和扫描透镜。 收敛光束由偏转器以均匀的角速度偏转。 扫描透镜将扫描光束形成扫描表面上的图像，以基本上均匀的速度扫描表面。 扫描透镜从偏转器的一侧包括负透镜元件和至少一个更多的透镜元件。 会聚光束入射到面向导流板的偏转器的表面上。 扫描透镜满足预定条件。

公开(公告)号：US5828480A

公开(公告)日：1998-10-27

申请号：US949921

申请日：1997-10-14

申请人： Hiromu Nakamura ,  Satoru Ono

发明人： Hiromu Nakamura ,  Satoru Ono

IPC分类号： G02B13/00 ,  G02B26/12 ,  G02B26/08 ,  G02B3/00

CPC分类号： G02B26/125 ,  G02B13/0005

摘要： A scanning apparatus has a luminous flux deflector and a single f.theta. lens. The deflector deflects a convergent luminous flux on a scanned surface at a uniform angular velocity. The f.theta. lens is arranged between the deflector and the scanned surface. The f.theta. lens is bi-convex in a main scanning direction and is made of a material having a refractive index of at most 1.6. One surface of the f.theta. lens in a main scanning direction is so curved that a radius of curvature in the main scanning direction decreases as an angle of view in the main scanning direction increases.

公开(公告)号：US5477373A

公开(公告)日：1995-12-19

申请号：US149613

申请日：1993-11-09

申请人： Hiromu Nakamura ,  Satoru Ono

发明人： Hiromu Nakamura ,  Satoru Ono

IPC分类号： B41J2/44 ,  B41J2/47 ,  G02B26/10 ,  G02B26/12 ,  G02B26/08

CPC分类号： B41J2/471 ,  G02B26/126

摘要： A laser beam optical scanning device including a housing, a light source for emitting a unidirectional laser beam, polygonal mirror for deflection scanning a laser beam emitted from the light source within a single plane, and optical members for directing the deflected scanning laser beam on the surface of a photosensitive member through a beam emission aperture of the housing. A transparent member is provided at the beam emission aperture of the housing so as to satisfy the following equation: ##EQU1## where X:distance (mm) from transparent member to surface of photosensitive member,.lambda.:laser beam wavelength (mm),D.sub.0 :beam diameter (mm) at center intensity 1/e.sup.2 on surface of photosensitive member.

摘要翻译： 一种激光束光学扫描装置，包括壳体，用于发射单向激光束的光源，用于偏转扫描在单个平面内从光源发射的激光束的多面镜，以及用于将偏转的扫描激光束引导到 感光构件的表面通过壳体的射束孔径。 透明构件设置在壳体的光束发射孔径处，以满足以下等式：感光构件的构件到表面，λ：激光束波长（mm），D0：中心强度1 / e2处的光束直径（mm） 感光部件的表面。

公开(公告)号：US5901256A

公开(公告)日：1999-05-04

申请号：US568758

申请日：1995-12-07

申请人： Hiromu Nakamura ,  Satoru Ono

发明人： Hiromu Nakamura ,  Satoru Ono

IPC分类号： B41J2/44 ,  G02B26/12 ,  G06K7/10 ,  G06K7/00 ,  G02B26/08

CPC分类号： G02B26/126 ,  G06K7/10702

摘要： A laser beam scanning device which has an improved cylindrical mirror in an optical path from a laser source unit to a polygonal mirror. The cylindrical mirror has a finite radius of curvature only in a sub scanning direction, and the radius of curvature in the sub scanning direction varies in a main scanning direction such that the closer to a laser beam incident side, the larger and the closer to a laser beam emergent side, the smaller. The laser beam reflected by the cylindrical mirror is converged on a line substantially parallel to each reflective facet of the polygonal mirror.

摘要翻译： 一种激光束扫描装置，其具有从激光源单元到多面镜的光路中的改进的圆柱形反射镜。 圆柱形反射镜仅在副扫描方向上具有有限的曲率半径，并且副扫描方向上的曲率半径在主扫描方向上变化，使得更靠近激光束入射侧，越大越接近 激光束紧急侧，较小。 由圆柱形反射镜反射的激光束会聚在基本上平行于多面镜的每个反射小面的线上。