摘要:
Disclosed is an image forming apparatus capable of keeping an oscillation angle of an oscillating mirror at a constant value based on control of a drive frequency. In this image forming apparatus, a semiconductor laser emits a light beam, and an oscillating mirror reflects the light beam emitted from the semiconductor laser, onto a target surface in a scanning manner. An oscillating-mirror drive circuit unit supplies a drive signal having a feature that a drive voltage varies based on a drive frequency, to the oscillating mirror, to reciprocatingly oscillate the oscillating mirror within a given angular range. A voltage-variation detection circuit detects a variation amount of the drive voltage, and a drive-frequency generation circuit alters the drive frequency depending on the variation amount of the drive voltage detected by the voltage-variation detection circuit.
摘要:
Disclosed is an image forming apparatus capable of keeping an oscillation angle of an oscillating mirror at a constant value based on control of a drive frequency. In this image forming apparatus, a semiconductor laser emits a light beam, and an oscillating mirror reflects the light beam emitted from the semiconductor laser, onto a target surface in a scanning manner. An oscillating-mirror drive circuit unit supplies a drive signal having a feature that a drive voltage varies based on a drive frequency, to the oscillating mirror, to reciprocatingly oscillate the oscillating mirror within a given angular range. A voltage-variation detection circuit detects a variation amount of the drive voltage, and a drive-frequency generation circuit alters the drive frequency depending on the variation amount of the drive voltage detected by the voltage-variation detection circuit.
摘要:
A printer has a laser emitter for emitting a laser beam to irradiate a surface of a photosensitive member; a reflector for reflecting the laser beam to a target position on the photosensitive member; a driver for moving the reflector; a resolution changeover designation acceptor for accepting a designation on a low resolution or a high resolution as a resolution for image formation; and an emission controller for controlling the laser emitter to emit the laser beam along a scanning line in a forward direction or a scanning line in a backward direction defined by the movement of the reflector driven by the reflective mirror driver if the designated resolution is the low resolution, and for controlling the laser emitter to emit the laser beam along the scanning line in the forward direction and the scanning line in the backward direction if the designated resolution is the high resolution.
摘要:
A transparent solid soap or transparent soap material which comprises mainly of a salt of the fatty acid, is obtained by saponifying fatty acid or animal/vegetable oil with alkali, wherein 1) the alkali is sodium hydroxide and organic amine, and a molar ratio of sodium hydroxide to organic amine is from 1:0.8 to 1:2, and 2) a quantity of the alkali is 2 to 3 saponifying equivalents to the fatty acid or the animal/vegetable oil. The transparent solid soap and the transparent soap material according to the present invention can be easily produced without requiring a fine control of moisture content, and a maturing period till reduction in weight is settled, and, besides, good in stabilities of transparency and of weight with a passage of time.
摘要:
A plant growth regulator containing as an active ingredient one or more compounds represented by the formula ##STR1## wherein R, X, Y and Z are defined in the specification is disclosed. The plant growth regulator is effective for a wide variety of plants, particularly for grassy plants. In addition to such activity, the regulator of this invention acts on plants to thicken the foliage and to aid health growth without causing substantial phytotoxicity.
摘要:
A urea derivative represented by the formula ##STR1## wherein X and n are defined hereunder, a process for preparing said derivatives and a herbicidal composition containing the same are disclosed.