摘要:
A focus error detection device to be used in an optical system for recording and/or playing back information, including a light detector made up of four light receiving elements arranged symmetrically with respect to the center of the light detector, a first operation circuit means connected to the light receiving elements for generating a focus error signal, and a second operation circuit means also connected to the light receiving elements for generating an off-set compensation signal. With this construction, and off-set of the focus error signal due to the deviation of the position of the reflection light beam is by far reduced as compared with the conventional devices.
摘要:
A focus error detection device to be used in an optical system for recording and/or playing back information, including a light detector made up of four light receiving elements arranged symmetrically with respect to the center of the light detector, a multiplication means for generating a pair of multiplication signal by multiplying output signals of two light receiving elements which are arranged symmetrically with respect to the center of the light detector. The multiplication signals are applied to a subtraction means where the focus error signal is generated by the subtraction between the multiplication signals. Thereby the off-set of the focus error signal which has been caused by the deviation of the position of the center of the light beam from the center of the light detector is by far reduced.
摘要:
A method and apparatus are provided which can automatically and securely supply a molding machine with natural resin pellets and masterbatch pellets at a predetermined mixture ratio, and which is excellent in performance and costs. A natural resin feeder and a masterbatch feeder are connected to a chute of the molding machine via respective tubes. The amount of the natural resin pellets and the amount of the masterbatch pellets which are air-transferred through the respective tubes are controlled such that they are transferred in accordance with the predetermined mixture ratio. The chute and the raw material supply port of the molding machine is connected by a pipe whose cross-sectional area at the upper portion is substantially equal to or smaller than that at the lower portion thereof. The natural resin feeder and the masterbatch feeder are intermittently operated in accordance with signals from an upper limit level meter and a lower limit level meter provided on the pipe.
摘要:
A video disk player which can read two types of video disk. In the conventional video disk, analog audio channels are recorded in a frequency band between a digital audio channel and a video channel of a narrower bandwidth. In an advanced video disk, there is a digital audio channel and the video channel is extended downward to become adjacent to the digital audio channel. The disk player adjusts the lower frequency cut-off of a video band-pass filter in accordance with a detection of the type of disk, possibly by a special recorded code or by the detection of the analog audio carriers. Preferably, the video band-pass filter comprises a high-pass filter with an adjustable cut-off and a low-pass filter and the frequency-demodulator is positioned between these two filters.
摘要:
A method of measuring the level of crosstalk noise in a playback signal produced from a recording disk such as a video disk, first and second signals of mutually different frequencies are recorded in respective sections of a track in a periodically alternating sequence. These first and second signals are also recorded in corresponding sections of at least one closely adjacent track in a periodically alternating sequence which is displaced with respect to the first-mentioned sequence. Playback of the first track is then repetitively performed, with switching selection of portions of the playback signal from the first sections and second sections respectively, and a derivation of levels of a beat component produced during these selected playback signal portions is obtained. The levels of the beat component are measured, and represent crosstalk noise levels.
摘要:
It is an object of the present invention to provide a reduced coenzyme Q, as a composition capable of being stably stored and, at the same time, soluble in water, which has not been used for industrial application because of its auto oxidation and lipophilic property. A reduced coenzyme Q-containing composition capable of being stored in a refrigerator or at room temperature for a prolonged period of time and of being soluble in water can be prepared by contacting or mixing the reduced coenzyme Q and a cyclodextrin to obtain a clathrated compound or by mixing an antioxidant, the reduced coenzyme Q and the cyclodextrin under an appropriate condition.
摘要:
An on-track and off-track state detecting apparatus in a compatible disk player capable of playing different types of disks, each carrying thereon at least one of a FM audio signal and an EFM signal. The apparatus detects an on-track state and off-track state by comparing the level of the FM audio signal component with a predetermined level, when the disk being played back does not carry the EFM signal, and by comparing the level of the EFM signal component with a predetermined level, when the disk being played back carries the EFM signal thereon. This apparatus commonly uses a level comparator circuit and performs a reliable detection of the respective on-track and off-track states.
摘要:
An optical-disk recording method, recording apparatus and reproducing apparatus are provided which are capable of continuously recording/reproducing a hologram with ultra-high density. In the case of recording a hologram to a holographic recording area, a holographic recording spot HSP on one track of the holographic recording area and a holographic recording spot HSP on a track adjacent thereto are recorded in circumferentially different positions. At least one holographic recording spot HSP is formed on each track, making the process continuous. Recording is made such that, provided that the holographic recording spot HSP has a diameter D and a multiplex number of holographic recording spots HSP is m, a pitch P between adjacent holographic recording spots HSP is P=D/m. Consequently, it is possible to efficiently record a hologram with density to a holographic recording area of an optical disk recording medium, and to achieve the density increase of holographic recording capacity.
摘要翻译:提供了能够以超高密度连续地记录/再现全息图的光盘记录方法,记录装置和再现装置。 在将全息图记录到全息记录区域的情况下,在全息记录区域的一个轨道上的全息记录点HSP和与其相邻的轨道上的全息记录点HSP被记录在周向不同的位置。 在每个轨道上形成至少一个全息记录点HSP,使得该过程连续。 进行记录,只要全息记录点HSP具有直径D,全息记录点HSP的多重数量为m,相邻全息记录点HSP之间的间距P为P = D / m。 因此,可以将密度全息图有效地记录到光盘记录介质的全息记录区域,并且实现全息记录容量的密度增加。
摘要:
The present invention has its object to provide a specific compound derived from a naturally occurring substance, and a composition for the prevention and/or treatment of metabolic syndrome and insulin resistance syndrome which comprises that as an active ingredient, easily and efficiently.The present invention relates to a composition for the prevention and/or treatment of metabolic syndrome and a composition for the prevention and/or treatment of insulin resistance syndrome, each of which comprises, as an active ingredient, at least one compound selected from among the compound represented by the formula (1), compounds represented by the formula (4) and compounds represented by the formula (5), or a salt or ester thereof.
摘要:
A method is disclosed, which is capable of subjecting microorganisms to sterilizing or bacteriostatic treatment with good efficiency as compared with the conventional sterilizing or bacteriostatic method using a noble metal electrode. Microorganism-containing water to be treated is electrochemically treated using an anode having conductive diamond to bring the microorganism into contact with the anode, thereby undergoing sterilization. Since the conductive diamond has a high oxidation potential as compared with other electrode substances, direct oxidation reaction due to contact between a microorganism in water to be treated, such as Legionella bacteria, and the anode surface occurs strongly as compared with other electrodes, thereby enabling effective sterilization. The conductive diamond has a high ability to generate ozone and has an excellent formation efficiency with respect to the generation of hydrogen peroxide and radicals. Accordingly, an indirect sterilizing effect can also be expected.