公开(公告)号：US5793486A

公开(公告)日：1998-08-11

申请号：US752579

申请日：1996-11-21

Applicant: Daniel A. Gordon ,  Mark J. Alguard

Inventor： Daniel A. Gordon ,  Mark J. Alguard

IPC: G01J3/50 ,  G01N21/25 ,  G01N21/86 ,  G01N21/89 ,  G01N21/892 ,  G01J3/42 ,  G01N21/80

CPC classification number: G01J3/36 ,  G01J3/10 ,  G01J3/50 ,  G01J3/524 ,  G01N21/255 ,  G01N21/86

Abstract: Disclosed is an apparatus for measuring on-line the color and color-related properties of a moving sheet. Contrast ratio reflectance measurements are made for providing opacity corrections substantially in real time for a full color spectrum. An optical color sensor in accordance with the invention includes a pair of synchronized spectrometers, the first spectrometer being aligned to view a region of the sheet backed with a highly reflective ("white") material and the second spectrometer being aligned to view a region of the sheet backed with a highly absorptive ("black") material. The use of two spectrometers permits substantially simultaneous "black" and "white" measurements for a full color spectrum. The optical color sensing system further includes two light sources, a flashlamp and a continuously energized tungsten filament lamp. Light beams from the two sources are combined to form a sheet-illuminating third beam approximating the D65 standard source. The intensity of the flashlamp is electronically controlled to maintain the balance of UV to visible light that characterizes the standard source. The color sensor further includes a sheet backing system including a rotatable standard wheel carrying a white standard tile. Provision is made to permit rotation of the standard wheel and to standardize the sensor off-sheet while maintaining isolation of the white standard tile from the paper mill environment. The sheet backing system includes a paper guide plate defining an annular vortex space into which air is introduced from a pressurized source. A low pressure region thereby produced in the vortex space draws the paper sheet toward the guide plate. At the same time, circulating air spirals outwardly from the vortex space to form a thin air film or air bearing between the sheet and the paper guide. Sheet flutter is thereby minimized and damage to the sheet is prevented.

Abstract translation: 公开了一种用于在线测量移动片材的颜色和颜色相关性质的装置。 对比度反射率测量用于为全色谱实质上实时提供不透明度校正。 根据本发明的光学颜色传感器包括一对同步的光谱仪，第一光谱仪被对准以观察具有高反射（“白”）材料的片材的区域，并且第二光谱仪被对准以观察 该片材具有高吸收性（“黑色”）材料。 使用两个光谱仪可以实现全色同步的“黑色”和“白色”测量。 光学颜色感测系统还包括两个光源，闪光灯和连续通电的钨丝灯。 来自两个源的光束被组合以形成近似D65标准源的片状照明第三光束。 闪光灯的强度是电子控制的，以保持紫外线到可见光的平衡，表征标准源。 该颜色传感器还包括一个片材背衬系统，其包括一个承载白色标准砖的可旋转的标准轮。 规定允许标准轮的旋转并标准化传感器脱模，同时保持白色标准砖与造纸厂环境的隔离。 片材背衬系统包括限定了从加压源引入空气的环形涡流空间的导纸板。 由此在涡流空间中产生的低压区将纸张朝向引导板拉出。 同时，循环空气从涡流空间向外螺旋形成在薄片和导纸板之间形成薄的空气薄膜或空气轴承。 因此，片材颤动最小化并且防止了片材损坏。

公开(公告)号：US4699510A

公开(公告)日：1987-10-13

申请号：US669110

申请日：1984-11-07

Applicant: Mark J. Alguard

Inventor： Mark J. Alguard

IPC: G01N21/64 ,  G01J1/42 ,  G01J3/18 ,  G01J3/433 ,  G01J3/443 ,  G01J3/46 ,  G01J3/50 ,  G01N21/86 ,  G01N21/27

CPC classification number: G01J3/50 ,  G01J3/1838 ,  G01J3/502 ,  G01N21/86 ,  G01J2001/4242 ,  G01J2003/468 ,  G01N21/4738 ,  G01N21/64

Abstract: An improved color sensor is provided having two sources of illumination, one source being modulated on and off while the other source remains on. Data taken while the modulated source is on is compared with data taken while the modulated source is off to compute the effective fluorescence of the sample. A corrected color spectrum can then be determined for a defined source.

Abstract translation: 提供了一种改进的颜色传感器，其具有两个照明源，一个源被调制为开和关，而另一个源保持接通。 将调制源所接收的数据与调制源关闭时所采集的数据进行比较，以计算样品的有效荧光。 然后可以为定义的源确定校正的色谱。

公开(公告)号：US5642192A

公开(公告)日：1997-06-24

申请号：US489362

申请日：1995-06-12

Applicant: Daniel A. Gordon ,  Mark J. Alguard

Inventor： Daniel A. Gordon ,  Mark J. Alguard

IPC: G01J3/50 ,  G01N21/25 ,  G01N21/86 ,  G01N21/89 ,  G01N21/892 ,  G01J3/42

CPC classification number: G01J3/36 ,  G01J3/10 ,  G01J3/50 ,  G01J3/524 ,  G01N21/255 ,  G01N21/86

Abstract: Disclosed is an apparatus for measuring on-line the color and color-related properties of a moving sheet. Contrast ratio reflectance measurements are made for providing opacity corrections substantially in real time for a full color spectrum. An optical color sensor in accordance with the invention includes a pair of synchronized spectrometers, the first spectrometer being aligned to view a region of the sheet backed with a highly reflective ("white") material and the second spectrometer being aligned to view a region of the sheet backed with a highly absorptive ("black") material. The use of two spectrometers permits substantially simultaneous "black" and "white" measurements for a full color spectrum. The optical color sensing system further includes two light sources, a flashlamp and a continuously energized tungsten filament lamp. The color sensor further includes a sheet backing system including a rotatable standard wheel carrying a white standard tile. Provision is made to permit rotation of the standard wheel and to standardize the sensor off-sheet while maintaining isolation of the white standard tile from the paper mill environment. The sheet backing system includes a paper guide plate defining an annular vortex space into which air is introduced from a pressurized source. A low pressure region thereby produced in the vortex space draws the paper sheet toward the guide plate. At the same time, circulating air spirals outwardly from the vortex space to form a thin air film or air bearing between the sheet and the paper guide.

Abstract translation: 公开了一种用于在线测量移动片材的颜色和颜色相关性质的装置。 对比度反射率测量用于为全色谱实质上实时提供不透明度校正。 根据本发明的光学颜色传感器包括一对同步的光谱仪，第一光谱仪被对准以观察具有高反射（“白”）材料的片材的区域，并且第二光谱仪被对准以观察 该片材具有高吸收性（“黑色”）材料。 使用两个光谱仪可以实现全色同步的“黑色”和“白色”测量。 光学颜色感测系统还包括两个光源，闪光灯和连续通电的钨丝灯。 该颜色传感器还包括一个片材背衬系统，其包括一个承载白色标准砖的可旋转的标准轮。 规定允许标准轮的旋转并标准化传感器脱模，同时保持白色标准砖与造纸厂环境的隔离。 片材背衬系统包括限定了从加压源引入空气的环形涡流空间的导纸板。 由此在涡流空间中产生的低压区将纸张朝向引导板拉出。 同时，循环空气从涡流空间向外螺旋形成在薄片和导纸板之间形成薄的空气薄膜或空气轴承。

公开(公告)号：US5642189A

公开(公告)日：1997-06-24

申请号：US489750

申请日：1995-06-12

Applicant: Mark J. Alguard

Inventor： Mark J. Alguard

IPC: G01J3/10 ,  G01J3/50 ,  G01N21/25 ,  G01N21/86 ,  G01N21/88 ,  G01N21/89 ,  G01N21/892 ,  G01N21/93 ,  G01N21/27 ,  G01N21/64

CPC classification number: G01J3/50 ,  G01J3/0259 ,  G01J3/10 ,  G01J3/502 ,  G01J3/524 ,  G01N21/255 ,  G01N21/86

Abstract: Disclosed is an apparatus for measuring on-line the color and color-related properties of a moving sheet. Contrast ratio reflectance measurements are made for providing opacity corrections substantially in real time for a full color spectrum. An optical color sensor in accordance with the invention includes a pair of synchronized spectrometers, the first spectrometer being aligned to view a region of the sheet backed with a highly reflective ("white") material and the second spectrometer being aligned to view a region of the sheet backed with a highly absorptive ("black") material. The use of two spectrometers permits substantially simultaneous "black" and "white" measurements for a full color spectrum. The optical color sensing system further includes two light sources, a flashlamp and a continuously energized tungsten filament lamp. Light beams from the two sources are combined to form a sheet-illuminating third beam approximating the D65 standard source. The intensity of the flashlamp is electronically controlled to maintain the balance of UV to visible light that characterizes the standard source. The color sensor further includes a sheet backing system including a rotatable standard wheel carrying a white standard tile. Provision is made to permit rotation of the standard wheel and to standardize the sensor off-sheet while maintaining isolation of the white standard tile from the paper mill environment. The sheet backing system includes a paper guide plate defining an annular vortex space into which air is introduced from a pressurized source. A low pressure region thereby produced in the vortex space draws the paper sheet toward the guide plate. At the same time, circulating air spirals outwardly from the vortex space to form a thin air film or air bearing between the sheet and the paper guide. Sheet flutter is thereby minimized and damage to the sheet is prevented.

Abstract translation: 公开了一种用于在线测量移动片材的颜色和颜色相关性质的装置。 对比度反射率测量用于为全色谱实质上实时提供不透明度校正。 根据本发明的光学颜色传感器包括一对同步的光谱仪，第一光谱仪被对准以观察具有高反射（“白”）材料的片材的区域，并且第二光谱仪被对准以观察 该片材具有高吸收性（“黑色”）材料。 使用两个光谱仪可以实现全色同步的“黑色”和“白色”测量。 光学颜色感测系统还包括两个光源，闪光灯和连续通电的钨丝灯。 来自两个源的光束被组合以形成近似D65标准源的片状照明第三光束。 闪光灯的强度是电子控制的，以保持紫外线到可见光的平衡，表征标准源。 该颜色传感器还包括一个片材背衬系统，其包括一个承载白色标准砖的可旋转的标准轮。 规定允许标准轮的旋转并标准化传感器脱模，同时保持白色标准砖与造纸厂环境的隔离。 片材背衬系统包括限定了从加压源引入空气的环形涡流空间的导纸板。 由此在涡流空间中产生的低压区将纸张朝向引导板拉出。 同时，循环空气从涡流空间向外螺旋形成在薄片和导纸板之间形成薄的空气薄膜或空气轴承。 因此，片材颤动最小化并且防止了片材损坏。