摘要:
An optical encoder has a light irradiating device; an optical scale having a grating for transmitting or reflecting incident light; light-receiving elements disposed in a plurality of different directions; and an optical system for amplitude-modulating light traveling from the light irradiating device to the optical scale and transmitted or reflected by the grating, by a dividing element in which a plurality of V-shaped grooves are juxtaposed, and for dividing the amplitude-modulated light into beams along a plurality of different directions to guide the beams to the respective light-receiving elements. The dividing element is comprised of repetitions of such structure that a plurality of V-grooves consisting of planes of mutually different angles are juxtaposed at a predetermined pitch.
摘要:
A rotary disc made of synthetic resin has a fixed portion fixed to a rotary shaft, a cylindrical portion extending in the thrust direction from the outer peripheral edge of the fixed portion, and a disc main body portion extending in the radial direction from the lower portion of the cylindrical portion, and a scale portion for detecting the rotation angle is disposed on the underside of the disc main body portion. Among the coefficient of thermal expansion α1 of the rotary disc, the coefficient of thermal expansion α2 of the rotary shaft, the temperature characteristic factor β of a sensor head, the distance H between a mounting reference surface and the light condensing point of the sensor head in the thrust direction, the distance L from the fixed point of the rotary shaft and a bearing to the fixed point of the rotary shaft and the rotary disc in the thrust direction, the distance S between the fixed point and the scale portion for rotation angle detection in the thrust direction, and the amount of change ΔT of temperature, a relational expression β×H×ΔT=(α2×L+α1×S)×ΔT and a relational expression L=H+S are established to thereby construct a rotation angle detecting apparatus which is hardly affected by any temperature change.
摘要:
An image recording apparatus records an image on a recording medium by causing a recording head having an arrangement of a plurality of recording elements to conduct its main scanning for the recording medium interrelatedly in the direction opposite to the arrangement of the recording elements. The apparatus comprises a setting device to set the number of main scannings by the recording head; a main scanning device to perform recording by plural numbers of main scannings with respect to one pixel by causing the recording head to conduct its main scannings for the same recording area of the recording medium in accordance with the number set by the setting device; and a sub-scanning device to cause the recording head and the recording medium to be sub-scanned interrelatedly per main scanning in an amount smaller than the width of the arrangement of the recording elements of the recording head. Hence, even if a disabled ejection occurs in one scanning at the time of recording by a multi-scanning, the missing dot is complemented by the following scan to make it possible to obtain an image having no image defects at all times.
摘要:
A density difference correction signal is generated for correcting a density difference upon forward path printing and backward path printing by density difference correction signal generating apparatus to store the generated density difference correction signal in an unevenness correction RAM. A predetermined correction line in a HS table memory is selected depending upon the density difference correction signal. By the selected correction line, the density correction of the image data of forward path printing and backward path printing is performed to output the image data.
摘要:
An object is to provide ink jet printed products superior in the image quality such that ink jet printing onto the cloths satisfy the various conditions regarding the density, resolution, and graininess of dot. To accomplish this object, when an image is formed by a number of dots obtained by discharging the ink from a print head to attach the ink onto the cloths, the ink amount discharged from the printing head onto the cloths is controlled to produce ink jet printed products so that the average value of equivalent circle diameter for each dot after image formation may be three-fourths or less the average value of diameters of fibers constituting the cloths. Thereby, ink jet printed products excellent in image quality can be obtained with blurs reduced and high graininess of dot.
摘要:
An image forming apparatus includes reading means for reading the density of a test pattern corresponding to each of plural recording elements of a recording head, the recording elements being arranged in an array, and the test pattern being recorded by the recording elements. An eliminating means eliminates error information, recorded from an area outside a test pattern are, from density information obtained by the reading means when the density of a test pattern end portion corresponding to an end portion of the array of plural of recording elements is determined. A means is provided for uniforming the image densities in correspondence with the plurality of recording elements based on density information from which the error information is eliminated by the eliminating means.
摘要:
An ink-jet printer for printing an imaging using an ink-jet head has a heater for holding the temperature of the ink-jet head above a predetermined temperature. The temperature of the ink-jet head is held above the predetermined temperature at the time of a recording operation. When the recording operation ends, elapsed time from the end of recording is measured and, when elapsed time attains a predetermined time, current fed to the header is stopped. From this point onward, the temperature of the ink-jet head is held at a temperature below that which prevails at the time of recording until the next recording operation begins.
摘要:
An image forming apparatus for forming an image on a recording material comprising: a plurality of processing devices for forming the image; a detector for detecting at least a quantity of state relating to a control of the processing devices; a fuzzy inference computer for inferring, in accordance with the quantity of state, a quantity of control for use to control the processing devices.
摘要:
An image recording apparatus comprises an interface for inputting a binary image signal, a binary-multi-value converter that converts the input binary image signal into a multi-value image signal, a corrector for correcting the converted multi-value image signal according to characteristic data of a recording element, and a driver for driving the recording element according to the corrected multi-value image signal, thereby performing image recording.
摘要:
An image forming apparatus includes image bearing member; a toner image forming device for forming a toner image on the image bearing member; a transfer material carrying member carrying a transfer material; a transfer charging member for transferring the toner image from the image bearing member onto a transfer material carried on the transfer material carrying member, the transfer charging member being contactable to a backside of the transfer material carrying member not contactable to the transfer material; wherein (.alpha..sub.B +.alpha..sub.C).alpha..sub.B .ltoreq.100 is satisfied where .alpha..sub.B is a resistance of the transfer charging member, and .alpha..sub.C is a constant resistance between the transfer charging member and the transfer material carrying member.