公开(公告)号：WO1987000300A1

公开(公告)日：1987-01-15

申请号：PCT/US1986001338

申请日：1986-06-25

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  MUKA, Edward ,  WOO, Nea, Yea

IPC: G02F01/11

CPC classification number: G02F1/113 ,  H01S3/005 ,  H01S3/0085 ,  H01S3/1306 ,  H01S2301/02

Abstract: Apparatus for stabilizing a laser beam includes an acoustooptic cell (12) which receives an input laser light beam and produces an undiffracted, or zero-order, light beam and a diffracted beam in response to an RF signal at a predetermined frequency. The zero-order beam is applied to a utilization device (17, 19) which produces an information modulated output beam at an image zone. In order to reduce noise in the output beam at the image zone, there are provided means (18, 20) for producing an electrical signal which is a function of time-varying changes in the intensity of the zero-order beam, means (31, 34) for producing a reference signal representing the instantaneous intensity of an unmodulated output beam from the utilization device (17, 19), and adjustable means (20, 28) responsive to the electrical signal and the reference signal for effecting changes in the intensity of the zero-order beam to stabilize the beam.

Abstract translation: 用于稳定激光束的装置包括响应于预定频率的RF信号接收输入激光束并产生未衍射或零级光束和衍射光束的声光单元（12）。 零阶光束被施加到在图像区域产生信息调制输出光束的利用装置（17,19）。 为了减少图像区域的输出光束中的噪声，提供了用于产生电信号的装置（18,20），该电信号是零级光束强度随时间变化的函数的函数， ，34），用于产生表示来自所述利用装置（17,19）的未调制输出光束的瞬时强度的参考信号，以及响应于所述电信号和所述参考信号的可调整装置（20,28），以实现所述强度的变化 的零级光束来稳定光束。

公开(公告)号：WO1986005940A1

公开(公告)日：1986-10-09

申请号：PCT/US1986000563

申请日：1986-03-21

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  MUKA, Edward ,  CHANDLER, Jasper, S. ,  KESSLER, David ,  HARDY, James, Alan

IPC: H04N01/393

CPC classification number: H04N1/393 ,  G02B26/126 ,  G02B27/0031

Abstract: The laser printer uses a rotating polygon (30) and a cylindrical mirror (44) disposed between the polygon and an image zone. The cylindrical mirror corrects for pyramidal errors in an output image formed on a moving photosensitive member (PM) disposed at the image zone by making the operative polygon facet and the image zone optionally conjugate in the page scan direction. To change the length (S1, S2) of the image in the line scan direction at the image zone, the optical distance between the polygon and image zone is varied by moving the cylindrical mirror. The velocity of the photosensitive member is adjusted to change the length of the output image in the page scan direction. At the new image format size, the cylindrical mirror makes the operative polygon facet optically conjugate with the image zone in the page scan direction to correct for pyramidal errors.

Abstract translation: 激光打印机使用设置在多边形和图像区域之间的旋转多边形（30）和圆柱形反射镜（44）。 柱面镜通过使操作多边形面和图像区任选地在页面扫描方向上共轭来校正形成在设置在图像区域的移动感光构件（PM）上的输出图像中的锥体错误。 为了在图像区域沿线扫描方向改变图像的长度（S1，S2），通过移动圆柱形镜来改变多边形和图像区域之间的光学距离。 调整感光构件的速度以改变输出图像在页面扫描方向上的长度。 在新的图像格式尺寸下，圆柱形镜使操作多边形面与页面扫描方向上的图像区域光学共轭，以校正锥体误差。