摘要:
An image recording apparatus (1) causes a recording head (20) to move through a distance corresponding to one half of the recording width of the recording head (20) in a sub-scanning direction each time a recording drum (10) makes one rotation. This, light emitting devices (23, 24) record two line data in advance, and thereafter following light emitting devices (21, 22) record the same line data repeatedly at the same position. This increases the energy of laser light beams given to a recording position on a printing plate (P) to accomplish the recording of an image with reliability. The recording speed is not extremely decreased because not all light emitting devices (21 to 24) are used to make the repeated recordings at the same position on the printing plate (P). Further, the construction of optical systems and driving systems in the image recording apparatus is not complicated.
摘要:
An image recording apparatus (1) causes a recording head (20) to move through a distance corresponding to one half of the recording width of the recording head (20) in a sub-scanning direction each time a recording drum (10) makes one rotation. This, light emitting devices (23, 24) record two line data in advance, and thereafter following light emitting devices (21, 22) record the same line data repeatedly at the same position. This increases the energy of laser light beams given to a recording position on a printing plate (P) to accomplish the recording of an image with reliability. The recording speed is not extremely decreased because not all light emitting devices (21 to 24) are used to make the repeated recordings at the same position on the printing plate (P). Further, the construction of optical systems and driving systems in the image recording apparatus is not complicated.
摘要:
When rotating a recording drum at low speed, air is jetted from air jet ports toward a point of irradiation, in a direction to diffuse a gas generating from an image recording medium upstream with respect to a direction of rotation of a recording drum. An air curtain approximately semicircular about the point of irradiation is formed upstream thereof with respect to the direction of rotation of the recording drum. As a result, the gas can hardly diffuse from the point of irradiation upstream with respect to the direction of rotation of the recording drum. The gas is collected from a gas suction opening. Thus, the gas is reliably prevented from contacting the image recording medium having an image recorded thereon.
摘要:
In a focus control for following a focus position of light beam to be radiated to an optical disk to an optical disk surface, the technique is for shorten the memory length in the learning controller. The learning controller is provided to a focus feedback control system and updates the memory comprised of N numbers of memory cells with a shorter sample period than a time obtained by dividing the time required for one rotation of the disk by N numbers and outputs the learning results in the memory with the shorter sample period.
摘要:
A control unit positions a laser beam toward a target track on a medium on the basis of a tracking error signal (TES) Y indicative of a positional deviation amount from a track center as a zero point on the basis of return light from the medium. A position signal correcting unit executes a correcting arithmetic operation using a non-linear function such as a quadratic polynomial, a quadratic monomial equation, or the like to the TES Y and outputs a corrected TES Z obtained by correcting detection sensitivity characteristics to desired characteristics so that a feedback is sufficiently performed when a lead-in control to the track center by the control unit is executed.
摘要:
A system for and a method of recognizing and tracking a target mark with a video camera is disclosed. The system includes a target mark (10) disposed on an object (1) and composed of a black circle and a white triangle mounted centrally on the black circle and three-dimensionally shifted from the black circle, a video camera (20) for imaging the target mark (10), a robot (30) supporting the video camera (20) and movable in directions with six degrees of freedom, an image processor (40) for processing image data of the target mark which is produced by the video camera (20), a shift calculating unit (50) for detecting a shift of the target mark (10) from projected histogram information of the target mark (10) which is produced by the image processor (40), and a robot controller (60) for controlling movement of the robot depending on the shift to enable the video camera (20) to track the target mark (10). The system is capable of tracking the target mark ( 20) attached to the object (1) on a real-time basis. Mark recognizing apparatus capable of accurately recognizing target marks of other shapes is also disclosed.
摘要:
A process for the production of a 4-halo-3-hydroxybutyronitrile which comprises reacting a 1,3-dihalo-2-propanol with a dehalogenating enzyme originating from a Corynebacterium or a Microbacterium in the presence of an alkali cyanide to thereby convert the 1,3-dihalo-2-propanol into the 4-halo-3-hydroyxbutyronitrile and collecting the product thus formed is disclosed. According to this process, a 4-halo-3-hydroxybutyronitrile which is highly useful in the syntheses of various medicines and physiologically active substances can be easily and efficiently produced from an inexpensive starting material.
摘要:
A process for preparing an optically active (R)-(-)-3-halo-1,2-propanediol comprising reacting an epihalohydrin with an epihalohydrin hydratase originating from a microorganism. For example, the microorganism belongs to the genus Corynebacterium or the genus Microbacterium. Epihalohydrins which can be used include epichlorohydrin and epibromohydrin. The reaction can be carried out at a temperature of from 5.degree. to 50.degree. C. and a pH of from 4 to 10.
摘要:
This invention provides a process for the production of acrylamide from acrylonitrile in an aqueous medium by use of a microorganism having nitrilasic activity, wherein at least one compound selected from alkali metal carbonates and bicarbonates is added to the aqueous medium, either solely or in combination with an organic carboxylic acid, thus inhibiting the swelling of fixed cells, maintaining the enzymatic activity for a long period of time, and efficiently obtaining an aqueous solution of acrylamide having high quality.
摘要:
An information storage device having a uniaxial tracking mechanism as a pickup which can perform a stable track pull-in operation is provided. A deceleration pulse amplitude á supplied to a tracking actuator is determined from a linear function á=K(V−V0) of a detected movement velocity of a beam in the vicinity of a target track. The deceleration pulse amplitude is divided into two, and is supplied to the tracking actuator on two different occasions.