Abstract: A computer lift has a stationary lift assembly and a movable monitor mount containing a gas spring cylinder fixed at one end, using a pulley assembly and cable to double the stroke of the gas spring cylinder by floating the pulley assembly. A positive lock allows the lift to stay in position after moving to a desired height, while maintaining easy movability.

Abstract: Conventionally, during a copy operation, certain advanced mode settings make the extraction of additional security information impossible. In order to solve this problem, the print control apparatus includes: determining unit for determining an interval between a pattern element and a pattern element adjacent to the pattern element from the received image data; and control unit for performing a control so as to scale the image at a magnification specified by a user and have the scaled image printed by a printing apparatus when the product of the magnification specified by the user and the interval determined by the determining unit falls within a predetermined range, and configured to terminate or interrupt the printing of the image by the printing apparatus when the product of the magnification specified by the user and the interval determined by the determining unit does not fall within the predetermined range.

Abstract: A system includes an illuminator, a mask, and a measurement device. The illuminator includes a light source. The mask includes at least one focus determination pattern having a first pattern portion and an adjacent second pattern portion. The first pattern portion and the second pattern portion have substantially the same width but produce a phase difference in light transmitted through the pattern portions. The measurement device measures a first critical dimension and a second critical dimension of a feature produced on a target by the at least one focus determination pattern. The difference between the first critical dimension and the second critical dimension relates to an amount of defocus and is sensitive to the focus change. The system may also include a feedback control loop where a determination regarding an amount of defocus is used to focus the position of a wafer or a mask or both of them onto the target. Additional apparatus, systems, and methods are disclosed.

Abstract: A scanning exposure apparatus includes an illumination optical system for illuminating a pattern of an original through an opening being conjugate or approximately conjugate with the pattern of the original, and a changing mechanism for changing a width of the opening with respect to a scan direction of the original. The changing mechanism includes a light blocking plat, and a plurality of driving mechanisms for moving the light blocking plate. The plurality of driving mechanisms is provided at different positions with respect to the light blocking plate and also are arranged to be driven by an actuator. At least one of the plurality of driving mechanisms includes a guiding mechanism for allowing a deviation between a position of an object to be driven by the actuator and a position of the light blocking plate, with respect to a direction different from a direction of displacement of the object to be driven.

Abstract: A photographic lens and test chart provide for a method of inspecting and adjusting the focus of the lens. The test chart is obliquely inclined relative to a plane perpendicular to the viewing axis of the photographic lens. Test photographs are taken of the test chart under low magnification and high magnifications the test photographs enabling the photographic lens to be adjusted for proper focus.

Abstract: A document scanning system includes a preview sensor that is dedicated to document previewing and distinct from any other sensor that is involved in the document scanning process. The preview sensor is preferably a two-dimensional sensor array that captures the outline of an entire document in parallel. The captured document outline is previewed on a display device relative to an actual image area that is defined by the scanning system. In an enhanced embodiment of the scanning system, the preview sensor captures an image that is printed on the document in addition to the outline of the document, so that the image of the document is also previewed relative to the image area. Providing a dedicated preview sensor that captures document position and image data in parallel enables real-time display of a document relative to the image area.

Abstract: A document copy system includes a preview sensor that is dedicated to document previewing and distinct from any other sensor that is involved in the document copying process. The preview sensor is preferably a two-dimensional sensor array that captures the outline of an entire document in parallel. The captured document outline is previewed on a display device relative to an actual print area that is defined by the copy system. In an enhanced embodiment of the copy system, the preview sensor captures an image that is printed on the document in addition to the outline of the document, so that the image of the document is also previewed relative to the print area. Providing a dedicated preview sensor that captures document position and image data in parallel enables real-time display of a document relative to the print area.

Abstract: A scan-range-changing mechanism of a scanner includes a scanning-scale ruler, a charge coupled device (CCD), a sliding seat which supports single-axis or two-axis moving capabilities, a plurality of lenses which are rigidly fixed on a sliding seat and located between the scanning-scale ruler and the CCD, and a plurality of scanning labels on the scanning-scale ruler for aligning and focusing the lenses with respect to the CCD.

Abstract: A scanning apparatus providing an object focal plane for original documents to be scanned, wherein a scan carriage containing illumination, sensor, and optical elements is moved together to scan an original document and to obtain a digitized representation thereof. The movable carnage further includes an automatically-positioned alignment grid for aligning original documents, such that the grid is visible at the surface and moves with the scan carriage.

Abstract: A copier for providing photographic copies of different sized originals, having an optical system variable for altering the magnification of an original, a scale member movable to locate the end of each respective size of original on the copier, and a link mechanism intercoupling the optical system and the scale to automatically vary the system magnification in accordance with the location of the scale.

Abstract: An image forming apparatus is provided with a pair of pointers for indicating a range for image formation on an original table. The pointers, which are driven by a pulse motor, can move in a direction perpendicular to the moving direction of an optical system for optically scanning the original. A stopper is attached to at least one end portion of a minimum range for image formation indicated by the pointers. The stopper serves to stop the pointer at position indicating the minimum range. In setting the initial positions of the pointers, pulse output means supplies the pulse motor with a necessary number of pulses for the movement of the indicating means from the minimum-range position to the maximum-range position, thereby causing the pointers to move to a position abutting the stopper.

Abstract: A display device for a copying machine, wherein when a special mode such as copying with reduction and duplex copying (copying on both surfaces of a copying paper) is selected, it is judged whether the paper feed cassette set for copying is proper for the mode selected and if so, the paper feed cassette set for copying is displayed, while if not, the applicable paper feed cassettes are displayed successively, and furthermore, the paper size stacked in the paper feed cassette is displayed regardless of whether it is in the metric size system or the inch size system.

Abstract: An image forming apparatus is provided with a pair of pointers for indicating a range for image formation on an original table. The pointers, which are driven by a pulse motor, can move in a direction perpendicular to the moving direction of an optical system for optically scanning the original. A stopper is attached to at least one end portion of a minimum range for image formation indicated by the pointers. The stopper serves to stop the pointer at position indicating the minimum range. In setting the initial positions of the pointers, pulse output means supplies the pulse motor with a necessary number of pulses for the movement of the indicating means from the minimum-range position to the maximum-range position, thereby causing the pointers to move to a position abutting the stopper.

Abstract: The area detection method detects an area on an original enclosed with a mark of specific color by the steps of scanning the original by a photosensor, judging whether the number of the mark segment detected by the photosensor in a single scan line is an even or odd number for each scan and detecting the area based on the output of the photosensor in the scan period for which the judgement is made that the number of the detected mark segment is an even number.

Abstract: A variable magnification type copying machine has a zoom lens disposed between a platen and a photosensitive surface, the zoom lens being composed of a plurality of movable lenses. A chart located on the platen in a position not to interfere with the placement of an original on the platen projects an image of itself into a line sensor. The line sensor outputs video determination signals indicative of the focus and magnification of the zoom lens. The magnification determination signals operate a stepping motor which positions the zoom lens for the desired magnification. The focus determination signals operate a stepping motor to adjust the distance between movable lens to obtain optimum focus.

Abstract: A copy camera has a lens board positioned by a lens lead screw and a copyboard positioned by a copyboard lead screw. A ratio-selecting knob rotates the shaft of a lens counter that is connected by a flexible coupling to spur gears that rotate the lens feed screw so that the count in the lens counter corresponds to the ratio of image size to object size. Spur gears intercouple the lens counter shaft to the tape advance drum that carries a tape with numbers denoting a copyboard counter setting for establishing an object distance between copyboard and lens for maintaining an object at that distance in sharp focus for attaining the ratio indicated in the lens counter. A copyboard setting knob rotates the copyboard counter shaft that is connected by a flexible coupling to the copyboard lead screw to enable an operator to set the copyboard counter to the value displayed on the tape drum.

Abstract: In an electrophotographic apparatus, an image transmission system which is provided with a focusing light path, a duplication light path and a magnifying mechanism moves toward an original laying unit by scanning the image of an original section by section during a copying operation. One of the mirrors in the image transmission system rotates between a first position wherein it forms the focusing light path and a second position wherein it forms the duplication light path. During the copying operation, the original laying unit is also movable simultaneously in either same or opposite direction relative to the movement of the image transmission system so that an image of desired magnification rate and of accuracy is produced on a photosensitive element without requiring the lens of a long focal length.

Abstract: A continuously variable reduction optical system for document copiers wherein a plurality of sets of reduction indicators are provided, each set corresponding to a particular size copy paper. Each set of indicators can be moved by the operator to frame the document to be copied and simultaneously the reduction optical system is set to provide proper adjustment for all system parameters. The indicators are continuously viewable by the operator. An embodiment is disclosed wherein each indicator is positioned so that reduction ratio is maintained whatever the copy paper size.