公开(公告)号：US4794422A

公开(公告)日：1988-12-27

申请号：US125795

申请日：1987-11-27

申请人： Richard F. Lehman ,  David K. Shogren ,  Thomas J. Hammond ,  Lawrence J. Mason

发明人： Richard F. Lehman ,  David K. Shogren ,  Thomas J. Hammond ,  Lawrence J. Mason

IPC分类号： G03G15/04 ,  G03G15/20

CPC分类号： G03G15/201 ,  G03G15/04 ,  G03G15/043

摘要： In a full-frame flash electrophotographic printing machine, an imaging system is provided which incorporates a flash lamp directly coupled to an ac line input to enable document exposure. The imaging system also includes a lens whose movement is synchronized with a moving photoreceptor so that an exposure occurs registered at the same image area of the photoreceptor. The invention further includes circuit means for detecting zero crossing points of the line voltage and for generating signals which are used to trigger the lamp into operation at some point during an 8 msec, half cycle of line operation. Further circuit means are provided for controlling exposure levels to conform to detected density of the document being copied. In a second embodiment, the control circuitry is used to couple the ac line into a flash fuser assembly to fuse a transferred image on an output record medium.

摘要翻译： 在全帧闪光电子照相印刷机中，提供了一种成像系统，其包括直接耦合到AC线输入的闪光灯，以实现文档曝光。 成像系统还包括其运动与移动感光体同步的透镜，使得在感光体的相同图像区域登记曝光。 本发明还包括电路装置，用于检测线电压的过零点，并且用于产生用于在8毫秒，半周期的线路操作期间的某一点触发灯投入运行的信号。 提供了进一步的电路装置，用于控制曝光水平以符合被检测文件的检测密度。 在第二实施例中，控制电路用于将ac线耦合到闪光定影组件中，以将转印的图像熔合在输出记录介质上。

公开(公告)号：US4519703A

公开(公告)日：1985-05-28

申请号：US514372

申请日：1983-07-15

申请人： Richard F. Lehman ,  Roland W. Porth ,  Lawrence J. Mason

发明人： Richard F. Lehman ,  Roland W. Porth ,  Lawrence J. Mason

IPC分类号： G03B27/54 ,  G03G15/04 ,  G03G15/043 ,  G03B27/72

CPC分类号： G03B27/542 ,  G03G15/04036 ,  G03G15/0435

摘要： A selective color copyability illuminator includes a pair of lamps having complementary spectral emission. The ratio of the lamp outputs are adjustable to enhance a first color of an original to be copied while suppressing the second color. The power input to the lamps is also continually adjustable to maintain a desired exposure level at an imaging plane. In a preferred embodiment, a dichroic reflector is utilized with each lamp to enhance system efficiency.

摘要翻译： 选择性彩色可复制照明器包括具有互补光谱发射的一对灯。 灯输出的比率是可调节的，以便在抑制第二颜色的同时增强要复制的原稿的第一颜色。 输入到灯的功率也是连续可调的，以便在成像平面上保持期望的曝光水平。 在一个优选实施例中，与每个灯一起使用二向色反射器以提高系统效率。

公开(公告)号：US4272188A

公开(公告)日：1981-06-09

申请号：US77237

申请日：1979-09-19

申请人： Richard F. Lehman ,  Stephen C. Corona

发明人： Richard F. Lehman ,  Stephen C. Corona

IPC分类号： G03B15/05 ,  G03B27/72 ,  H05B41/32

CPC分类号： H05B41/325

摘要： An automatic exposure control system for a full-frame copier controls the illumination of a flash lamp in response to the reflectivity of a document to be reproduced. A photodetector senses exposure at the wall of a light housing and after sufficient exposure is reached, the light source is turned off (quenched). A compensation circuit anticipates the total energy emitted after quench (representing an over exposure potential) and terminates the light source energizing pulse so as to produce only desired exposure without over-exposure error.

摘要翻译： 全帧复印机的自动曝光控制系统响应于要再现的文档的反射率来控制闪光灯的照明。 光电检测器感测在灯壳的壁处的曝光，并且在达到充分的曝光之后，光源被关闭（淬火）。 补偿电路预期淬火后（表示过度曝光电位）发出的总能量并终止光源激励脉冲，从而仅产生期望的曝光而不产生过度曝光误差。

公开(公告)号：US4082450A

公开(公告)日：1978-04-04

申请号：US634007

申请日：1975-11-21

申请人： Richard F. Lehman

发明人： Richard F. Lehman

IPC分类号： G03G15/04 ,  G03B27/76

CPC分类号： G03G15/04027

摘要： Apparatus for providing a structured radiation pattern in the charge distribution of a photoreceptor in electrographic reproduction machines. The apparatus is comprised of a source of radiation, a plurality of apertures and a lens system for focusing the radiation transmitted by the apertures onto a charged photoreceptor. The position of the apparatus relative to the photoreceptor can provide a method for control of the structure of the photoreceptor charge. The photoreceptor charge structure can be further controlled by providing preselected patterns for radiation transmitted by the apertures. The charge distribution of the photoreceptor can be structured to form a line or a dot pattern.

公开(公告)号：US06606171B1

公开(公告)日：2003-08-12

申请号：US08948108

申请日：1997-10-09

申请人： Jeffrey D. Renk ,  Richard F. Lehman ,  Mark R. Fernald ,  Calvin M. Winey

发明人： Jeffrey D. Renk ,  Richard F. Lehman ,  Mark R. Fernald ,  Calvin M. Winey

IPC分类号： H04N104

CPC分类号： H04N1/00013 ,  H04N1/00002 ,  H04N1/00037 ,  H04N1/00053 ,  H04N1/00063 ,  H04N1/00087 ,  H04N1/02815 ,  H04N1/0284 ,  H04N1/02885 ,  H04N1/121 ,  H04N1/191 ,  H04N1/40056 ,  H04N1/40068 ,  H04N1/401 ,  H04N2201/0412

摘要： A digitizing scanner particularly for scanning transparent films such as X-rays provides an improved illuminator for transmitting light through the film. The illuminator defines a line array of a plurality of individually calibrated and controlled LEDs. The LEDs are calibrated by determining their relative points of projection on a CCD camera array. The camera array scans the LEDs and adjusts them individually to produce a predetermined illumination pattern from the group. The adjustment occurs over a plurality of cycles that address cross-talk between LEDs in the array. The camera includes anti-reflection elements to minimize bounce-back of image light and noise suppression circuitry to reduce low-level signal noise. A central processing unit, interconnected with the camera assembly includes a pixel averager to reduce the inherent resolution of the CCD to a desired level and to attenuate further noise. The scanner can include an illuminator for illuminating a scannable opaque bar-code strip and size-measurement circuitry for determining the relative size and location of the scanned image.

摘要翻译： 特别用于扫描诸如X射线的透明膜的数字化扫描器提供了用于透过膜的光的改进的照明器。 照明器定义多个单独校准和控制的LED的线阵列。 通过确定它们在CCD相机阵列上的相对投影点来校准LED。 相机阵列扫描LED并分别调整它们以从组中产生预定的照明图案。 调整发生在解决阵列中的LED之间的串扰的多个周期中。 相机包括防反射元件，以最小化图像光和噪声抑制电路的反弹，以降低低电平信号噪声。 与相机组件相互连接的中央处理单元包括像素平均器，以将CCD的固有分辨率降低到期望的水平并衰减进一步的噪声。 扫描器可以包括用于照亮可扫描的不透明条形码条的照明器和用于确定扫描图像的相对尺寸和位置的尺寸测量电路。

公开(公告)号：US5155541A

公开(公告)日：1992-10-13

申请号：US736375

申请日：1991-07-26

申请人： Robert P. Loce ,  Richard F. Lehman

发明人： Robert P. Loce ,  Richard F. Lehman

IPC分类号： G03G15/01

CPC分类号： G03G15/0157 ,  G03G15/0163 ,  G03G2215/0495

摘要： Method and apparatus for printing toner images in black and at least two highlighting colors in a single pass of the imaging surface through the processing areas of the printing apparatus. Imaging and development techniques of color photography and tri-level xerography are combined to produce images with black and two colors wherein the two highlighting colors are developed with only one color toner. A single imaging step forms a four level charge pattern on a charge retentive surface followed by development of two of the image levels using tri-level imaging techniques. Uniform exposure of the imaging surface, similar to that used to color photography techniques precedes development of the last image. The uniform exposure modifies the last developed image level and the background charge level allowing development of the last image with a single toner.

摘要翻译： 通过打印设备的处理区域在成像表面的单次通过中打印黑色调色剂图像和至少两个突出显示颜色的方法和设备。 彩色摄影和三级静电复印的成像和开发技术被组合以产生具有黑色和两种颜色的图像，其中两种高亮颜色仅用一种彩色调色剂显影。 单个成像步骤在电荷保持性表面上形成四级电荷图案，随后使用三级成像技术显影两个图像水平。 成像表面的均匀曝光类似于彩色摄影技术的曝光先于最后一幅图像的开发。 均匀曝光修改最后显影的图像水平和背景电荷水平，从而允许使用单个调色剂开发最后一张图像。

公开(公告)号：US4982233A

公开(公告)日：1991-01-01

申请号：US433249

申请日：1989-11-08

申请人： Richard F. Lehman ,  James D. Rees

发明人： Richard F. Lehman ,  James D. Rees

IPC分类号： G03G21/00 ,  G03B27/52 ,  G03G15/04 ,  G03G15/043

CPC分类号： G03G15/04

摘要： A sensor array is positioned in the optical scanning system of a copier so as to be able to periodically provide a measurement of the degree of image degradation present in the system due to contamination of the optical system components. The sensor array is adapted to measure the modulation transfer frequency of a bar chart which is exposed in the optical system. The measured value of MTF is compared to a predetermined value of MTF representing a uncontaminated measurement at the bar chart. When the comparison indicates that the measured MTF is below a minimum acceptable threshold value, a display is activated to alert an operator that an optic system cleaning operation is required.

摘要翻译： 传感器阵列位于复印机的光学扫描系统中，以便能够周期性地提供由于光学系统部件的污染而在系统中存在的图像劣化程度的测量。 传感器阵列适于测量在光学系统中暴露的条形图的调制传递频率。 将MTF的测量值与条形图上的未受污染测量的MTF的预定值进行比较。 当比较表明所测量的MTF低于最小可接受阈值时，显示器被激活以提示操作者需要进行光学系统清洁操作。

公开(公告)号：US6023348A

公开(公告)日：2000-02-08

申请号：US324898

申请日：1994-10-18

申请人： Thomas W. Bosse ,  Mark W. Magee ,  Richard F. Lehman ,  Calvin Winey, III

发明人： Thomas W. Bosse ,  Mark W. Magee ,  Richard F. Lehman ,  Calvin Winey, III

IPC分类号： H04N1/06 ,  H04N1/08 ,  H04N1/04

CPC分类号： H04N1/0678 ,  H04N1/0657 ,  H04N1/08

摘要： A dual drum rotary image scanner has a headstock and a tailstock between which may be mounted drums of different diameter. The tailstock has substantially annular surfaces which contact corresponding surfaces on the different diameter drums. The different drums, when held in the scanner, each create a different separation between the headstock and tailstock. These different separations are detected by photodetectors, the outputs of which are received by a system controller. The controller uses the photodetector signals to control motors that position the scanning head and the transmittance illuminator relative to the surface of the particular drum mounted in the scanner. The motors turn pinions which, in turn, move racks to which are attached the scanning head and the transmittance illuminator, respectively. The movement of the scanning head also results in the modification of the optical path within the optics box of the scanner. In a first position, the light from the scanning head follows a first optical path which includes a movable mirror in a first angular orientation. As the scanning head is moved to a second position, the angular orientation of the movable mirror is changed, and the light from the scanning head follows a second optical path which includes the movable mirror in its new orientation. Support arms are also provided which adjust to support the different diameter drums during loading, and mounting surfaces between the drum being mounted and the headstock and tailstock are shaped to allow the drum to be lifted off the supports as the headstock and tailstock are brought together.

摘要翻译： 双鼓旋转图像扫描器具有主轴箱和尾座，在其之间可以安装不同直径的滚筒。 尾架具有基本上环形的表面，其接触不同直径的鼓上的相应表面。 不同的鼓，当保持在扫描仪中时，都会在头架和尾座之间产生不同的分隔。 这些不同的分离由光电检测器检测到，其输出由系统控制器接收。 控制器使用光电检测器信号来控制将扫描头和透射照明器相对于安装在扫描器中的特定鼓的表面定位的电动机。 电动机转动小齿轮，这些小齿轮又分别移动附接到扫描头和透射照明器的机架。 扫描头的移动也导致扫描仪的光学盒内的光路的修改。 在第一位置，来自扫描头的光线遵循第一光路，其包括处于第一角度取向的可移动反射镜。 当扫描头移动到第二位置时，可移动反射镜的角度取向被改变，并且来自扫描头的光沿着包括可移动镜在其新取向的第二光路。 还提供支撑臂，其调节以在装载期间支撑不同直径的鼓，并且安装在安装的滚筒与主轴箱和尾座之间的安装表面成形为当主轴箱和尾座组合在一起时允许滚筒从支架上提离。

公开(公告)号：US4576462A

公开(公告)日：1986-03-18

申请号：US678316

申请日：1984-12-05

申请人： Richard F. Lehman

发明人： Richard F. Lehman

IPC分类号： G03G15/04 ,  G03B27/54 ,  G03B27/72 ,  G03G15/043 ,  G03G15/01

CPC分类号： G03B27/542

摘要： A selective color copyability illuminator includes a pair of lamps each having a spectral emission suitable for copying black and white documents or documents incorporating a specific color. The lamp emissions are selectively controlled depending upon the color of the document being copied. Faceted reflectors, associated with each lamp, are moved to positions which cover or uncover the lamp aperture to enhance selective deletion of a particular color of the document being copied.

摘要翻译： 选择性彩色可复制照明器包括一对每个具有适于复印黑白文档或包含特定颜色的文档的光谱发射的灯。 根据正在复印的文件的颜色选择性地控制灯的排放。 与每个灯相关联的方形反射器被移动到覆盖或露出灯孔的位置，以增强对被复制的文档的特定颜色的选择性删除。

公开(公告)号：US4571058A

公开(公告)日：1986-02-18

申请号：US669490

申请日：1984-11-08

申请人： Richard F. Lehman

发明人： Richard F. Lehman

IPC分类号： G03B27/54 ,  G03G15/04 ,  G03G21/00

CPC分类号： G03G15/04 ,  G03B27/542 ,  G03G15/0435

摘要： A full-frame flash illumination and imaging system is disclosed wherein an optical component located in the floor of the light housing compensates for unwanted charge variations on a photoreceptor belt caused by reflections of the lens from the document platen. The area of the belt upon which a negative lens image is formed is predetermined and a controlled quantity of light is directed towards this area, using light generated in the housing during exposure, to reduce the charge level of the area to the degree necessary to compensate for the negative lens image. Several optical components useful for this purpose are disclosed including a light pipe and a second projection lens.

摘要翻译： 公开了一种全帧闪光灯照明和成像系统，其中位于灯壳底部的光学部件补偿由透镜从原稿台上的反射引起的感光带上的不期望的电荷变化。 形成负透镜图像的带的面积是预定的，并且受光量的光线被引导到该区域，使用在曝光期间在壳体中产生的光，以将该区域的电荷水平降低到补偿所需的程度 用于负透镜图像。 公开了用于此目的的若干光学部件，包括光管和第二投影透镜。