摘要:
A scanning lens system forms into an image a deflected beam having its object point in the main scanning direction located at a finite distance to scan a scanned surface. The fourth surface is parallelly decentered in the main scanning direction relative to the optical axis passing the center of a main scanning direction scanning width on the scanned surface. The third and fourth surfaces are rotatively decentered relative to the optical axis about an axis parallel to the sub scanning direction.
摘要:
An optical device having an optical element, a base plate which has a mount surface for setting the optical element, a first holding member composed of at least a hole and a projection so as to permit the optical element mounted on the base plate to move longitudinally and a second holding member composed of a hole and a projection so as to restrain the optical element from moving in a direction orthogonal to an optical axis.
摘要:
A laser beam light source device which has Fresnel lens having grating of unequal spacing and facing a laser diode, and condenser lens made of resin. The focal length of the condenser lens is set at a value which nullifies changes in the focal length of the Fresnel lens induced by fluctuations in the oscillation wavelength of the laser diode accompanying temperature change, and changes in the focal length of the Fresnel lens accompanying temperature change. Further a laser beam scanning optical system for scanning on a scan line via a deflecting device and optical elements by a laser beam emitted from a laser light source based on image information. In the laser scanning optical system, a pair of anamorphic lenses are disposed anteriorly and posteriorly to the deflecting device to correct surface tilt of the deflecting device, one of the anamorphic lens being a Fresnel lens, another of the anamorphic lens being made of resin.
摘要:
An acoustic wave filter includes: a first acoustic wave filter having a first group of multimode filters connected, a first unbalanced input node and two first balanced output nodes, a first multimode filter among the first group of multimode filters being connected to the two first balanced output nodes; and a second acoustic wave filter having a second group of multimode filters, a second unbalanced input node and two second balanced output nodes, a second multimode filter among the second group of multimode filters having an aperture length different from that of the first multimode filter and a connection with the two second balanced output nodes, the first and second multimode filters having different pass bands. One of the two first balanced output nodes and one of the two second balanced output nodes are unified, and the other first balanced output node and the other second balanced output node are unified.
摘要:
A computer readable medium records a calibration program, which causes a control device to execute calibration processing of reading as image data a patch sheet output from an image formation device, having a plurality of patch patterns formed as images based on different density-gradation value data for each color, acquiring calorimetric values for each of the patch patterns from the read-out image data, and adjusting the density of the image formation device based on the density-gradation values and the acquired calorimetric values for each of the patch patterns. The program causes the control device to execute displaying the read-out image data of the patch sheet, detecting and displaying the position of each of the patch patterns in the image data of the patch sheet, and acquiring the calorimetric values for each the patch pattern based on the displayed patch pattern positions, in response to confirmation input by a user of the displayed patch pattern position.
摘要:
A calibration system includes: an image formation unit that outputs a patch sheet having a plurality of patch patterns based on different gradation values for each color of color material that is used; a selection unit that receives an instruction to select a device from among a plurality of color measurement devices comprising a first color measurement device and a second color measurement device of a lower color measurement accuracy than that of the first color measurement device; a color measurement unit that receives data of a color measurement result for the patch sheet that is color-measured by the color measurement device selected by the selection instruction; a color measurement value determination unit that acquires color measurement values for each of the patch patterns on the basis of the color measurement result data received; and a color adjustment unit that generates color correction information of the image formation unit on the basis of the color measurement values acquired. In the system, the output patch sheet is common irrespective of the color measurement device selected by the selection instruction and, when the second color measurement device is selected by the selection instruction, the color measurement value determination unit acquires, by averaging a plurality of the color measurement result data that exist in the patch pattern, the color measurement values for each of the patch patterns.
摘要:
Conventionally, wasteful processes are required for identifying the printing conditions for a color chart. According to the present invention, the printing conditions are identified as follows: a printing condition acquisition unit acquires predetermined printing conditions under which a color chart is outputted from a printing device. A color chart output unit outputs a color chart in which the disposition of predetermined patches is specified in correspondence with the acquired printing conditions under the printing conditions. A printing condition identification unit acquires the disposed positions of the predetermined patches when the color chart is subjected to color measurement to acquire the color value of each patch, and identifies the printing conditions based on the disposed positions.
摘要:
To detect deterioration of the ink used in a printing device, patches are printed based on image data for the output of certain target colors for each of the above inks, the color values of the printed patches are measured, the color values of the target colors and the measured color values are compared, and inks with differences at or over a certain level between the two, based on the results of the comparison, are determined to be inks that have deteriorated.