Abstract: An image scanner scans and stores a document as a color image and a monochrome image when color mode is set. In accordance with specifications of a destination apparatus, an appropriate image is selected as between the stored color image and monochrome image, and the selected image is transmitted to the destination apparatus. The image scanner is thus capable of efficiently transmitting a scanned image to apparatuses having various specifications.

Abstract: The image correction apparatus includes an image reading unit for reading a print image of an original image, where a mark is given to a defect on an image and an image correction unit for correcting image data of the original image by utilizing the position of the mark on a read image read by the image reading unit. The image correction apparatus efficiently corrects an image defect visually recognized on the print image without using an infrared ray, when the print image is output from image data of the original image.

Abstract: The invention relates to a method and apparatus for selection of pictures to print from a digital film, using a digital film enabled printer. The method comprises the steps of printing a selection sheet of thumbnail representations of photographs available on the digital film needed to be printed, the selection sheet further comprising a plurality of selection fields. According to a user choice of photograph to be printed, one or more of the selection fields associated with the thumbnails is marked and the marked selection sheet feed back into the printer. The printer includes a scanning mechanism which is arranged to read the marked up sheet and, in accordance with the user choice, print one or more photographs from the digital media in accordance with the marked selection fields.

Abstract: A digital copying machine comprising an image scanner part for reading an original image to reproduce image data of the original image, a laser printer part for printing an image according to given image data, a removable memory card, and a reader/writer of the memory card is provided. For offline print, the image data of a document prepared in an external computer and output control data are stored into the memory card. By installing this memory card in the digital copying machine, the digital copying machine prints the image data read out from the memory card offline in a desired output form. For offline image input, read control data obtained by using an image scanner such as a read gradation level, a read size, density, and the degree of edge enhancement is stored in the removable memory card using software executed in an external computer.

Abstract: In a network system to which a plurality of computers and a plurality of input-output apparatuses are connected, a layout diagram showing locations of the input-output apparatuses is displayed on a display means and icons each representing one of the input-output apparatuses are displayed over the layout diagram at locations corresponding to the locations at which the apparatuses are actually installed. The user clicks one of the icons representing a desired one of the input-output apparatuses by using a device such as a mouse in order to specify the desired apparatus. As a result, a desired input-output apparatus can be selected correctly.

Abstract: A photo printing system for transmitting image information including photo frame image data to a plurality of printers (P) through signal paths to print images, with a memory (41) for loading image information transmitted from an image input device (7), and a print order managing unit (50) for managing said image information on an order-by-order basis. The print order managing unit (50) includes a distributing unit (53) for applying printer IDs identifying the printers used, as attribute data, to the image information in the respective orders, a printer control unit (51) for checking an operating status of each of said printers, and a data output unit (54) for transmitting, based on a signal from said printer control unit, photo frame image data in an image file to be printed from said memory to one of said printers specified by the attribute data of said image file.

Abstract: The present invention concerns a method for producing prints, on which a specific image is printed based on a specific information set when a captured image is printed as a visible image on the print, based on image data of the captured image. The method includes the steps of: reading a plurality of specific information sets and a plurality of associate information sets, both of which are stored in a server, installed on a network, in such a manner that each of the specific information sets relates to each of the associate information sets in regard to a date and time and/or each of the associate information sets for identifying or classifying the specific information sets; selecting a part of specific information sets out of a plurality of the specific information sets read from the server, based on the associate information sets; and printing the specific image, based on the specific information set, on the print on which the captured image is also printed.

Abstract: When an output unit to produce output is specified through an instruction terminal 11 and original data is input to a color proof generation section 12, a color conversion section 13 acquires a color conversion parameter corresponding to the specified output unit from a color conversion information storage section 14 and performs color conversion processing for the original data so as to accomplish precise color reproduction in the specified output unit. A rasterizing section 15 expands the original data after undergoing the color conversion processing into raster data while using an enormous number of fonts in a font storage section 16. The raster data provided by the rasterizing section 15 is transmitted from a communication section 17 through a network 4 to the specified output unit. If a remote system 2 or 3, which receives the raster data, prints out on output unit 21 or 31, a color proof whose color is reproduced precisely can be provided.

Abstract: A network facsimile machine (1) managed by a management machine (2) using SNMP (Simple Network Management Protocol). The network facsimile machine is connected to the management machine over LAN (3). The network facsimile machine (1) has a copy function and a scan function. The network facsimile machine includes RAM (12) for storing information to be managed by the management machine (2). CPU (10) determines whether or not the information stored in RAM should be sent to the management machine on the basis of a level or seriousness of the information stored. The network facsimile machine (1) sends the information to the management machine (2) when CPU (10) determines that the information should be sent to the management machine.

Abstract: A method for extending a print area provides a printer with the capability of printing a larger image by extending the print area during the printing of an image. The method extends the print area by means of a window driver which transmits an image to be printed to a printer according to a print command input. The method includes a first print step of the window driver for transmitting a first portion of the image to be printed on a piece of paper, the first portion being bounded by a lower end margin of the piece of paper, and a second print step of the window driver for transmitting a second portion of the image to be printed on a portion of the piece of paper below the lower end margin of the paper. Accordingly, since the printable area becomes larger by reducing the lower end margin of the printer to the level of the upper end margin, documents created by a user (such as CAD drawings, graphics and charts) are printed without being cut.

Abstract: Disclosed is a FAX signal transmission system, in which the transmission side and the reception side are inter-coupled by a bearer. Each side is constituted by DCME comprising a transmission side, which includes a signal identification circuit 3, a FAX data allotment control circuit 4, a delay circuit 9, a FAX data demodulation circuit 11, a FAX data allotment signal generation circuit 13 and a multiplexing circuit 14, and a reception side, which includes a FAX data distribution control circuit, a FAX data transmission circuit and a FAX data remodulation circuit. The transmission side is provided with a control terminal for inputting signal identification data. The input signal identification content of the signal identification circuit 3 can be changed according to the signal identification data.

Abstract: In an image reading apparatus which scans an image while displacing the relative position between the image on a predetermined medium and an image sensor, and sequentially transmits the read image data to an external device, when image reading operation of an image reading unit suspends, the relative position between the image and the image sensor is displaced to a predetermined position before the suspended position of the image reading operation, and reading operation restarts from the displaced position.

Abstract: A device has a visible light emitting element for emitting visible light, an infrared light emitting element for emitting infrared light, a board including a first mounting portion on which elements including at least the visible light emitting element are mounted in array and a second mounting portion on which elements including at least the infrared light emitting element are mounted in array, and a dichroic mirror which is configured and disposed to reflect light emitted by the visible light emitting element mounted on the first mounting portion by its first surface, reflect light emitted by the infrared light emitting element mounted on the second mounting portion by its second surface, and send light beams coming from the first and second surfaces onto a common optical path.

Abstract: The invention provides a diffusing plate with the angle of diffusion controllable within a desired range by use of a hologram, which is capable of presenting bright displays so that it is applicable to, for instance, a backlighting diffusing plate for liquid crystal display device. A diffusing plate 2 having an angle of diffusion &thgr; is brought into close contact with a hologram photosensitive material 1. Then, parallel light 3 is obliquely at an angle of incidence &agr; on the photosensitive material 1 while parallel light 4 is vertically incident on the diffusing plate 2. Thereupon, parallel light 4 is converted into diffused light 5 having an angle of diffraction &thgr; upon passing through the diffusing plate 2. Diffused light 5 interferes with obliquely incident parallel light 3 from the opposite direction in photosensitive material 1 to produce interference fringes, thereby forming a reflection type hologram.

Abstract: Connected into a wavelength division multiplex ring network is a filter arrangement which has a low attenuation only for the individual useful signals of the wavelength division multiplex signal and recombines these, along with launched signals to form a wavelength division multiplex signal.

Abstract: A wavelength division multiplex transmission system includes N/2 (N is the maximum number of wavelengths to be used) CW light generating sections, N/2 switching circuit sections, and a wavelength multiplexing section. Each CW light generating section generates continuous wave light having the same wavelength as one of input even- and odd-numbered wavelengths used as operating wavelengths and outputs continuous wave light having a level twice as high as an input level of a light signal having an operating wavelength. Each switching circuit section selects one of an input wavelength and continuous wave light output from the corresponding CW light generating section. The wavelength multiplexing section outputs the other light signal of input light signals having even- and odd-numbered wavelengths and a light signal having different wavelength which is output from the switching circuit section upon wavelength multiplexing.

Abstract: A method and apparatus is described for compressing an optical pulse period of an optical pulse signal. The apparatus comprises at least one optical circuit each including optical delay means for delaying an-input optical signal to generate a first delayed optical signal, optical guiding means for guiding the first delayed optical signal to the optical delay means, and optical coupling means for coupling optical signals. The optical delay means delays the first delayed optical signal to generate a second delayed optical signal. The optical coupling means couples the second delayed optical signal with the input optical signal.

Abstract: An optical pulse signal generating apparatus include a circular optical waveguide, a first optical combiner, an optical converter, and a first optical splitter. A circulating optical signal can circulate in the circular optical waveguide in a direction. The first optical combiner is provided in the circular optical waveguide and inputs an externally inputted optical signal to combine the externally inputted optical signal and the circulating optical signal in the circular optical waveguide to produce a combination optical signal. The optical converter is provided in the circular optical waveguide and has a semiconductor optical amplifier which amplifies the combination optical signal and emits an amplified optical signal including an amplified spontaneous emission (ASE) optical signal. The optical converter outputs an optical pulse sequence signal from the combination optical signal via the amplified optical signal.

Abstract: In a multi-channel video optical transmission system comprising an optical transmitter and an optical receiver, a frequency modulation function incorporated pilot signal generating unit is provided in the optical transmitter to generate a pilot signal frequency-modulated. This frequency-modulated pilot signal is superimposed on a multi-channel video signal inputted thereto and is converted into a frequency-modulated signal in a frequency modulator, and is transmitted through an optical fiber to an optical receiver in a state converted into an optical signal in a semiconductor laser device. In the optical receiver, the optical signal is again converted into an electric frequency-modulated signal in a light-receiving device and, after amplified in an amplifier, is demodulated in a frequency demodulator, thereby regenerating the multi-channel video signal before the input to the frequency modulator.

Abstract: Provided are a multiplexing circuit for multiplexing a memory output signal output by a memory for temporarily accumulating a low-order group signal with an overhead bit necessary for optical digital transmission and a pattern generation circuit for generating an unfixed pattern having no fixed value. An unfixed pattern is applied to the multiplexing circuit while the memory outputs a fixed pattern. A selection circuit provided between the multiplexing circuit and the memory selects an unfixed pattern between a fixed pattern output by the memory and an unfixed pattern output by the pattern generation circuit.

Abstract: A wavelength division multiplex optical star coupler comprises an input port which inputs a first optical signal, a first optical coupler which divides the first optical signal input from the input port into a plurality of first optical signals, a plurality of input/output ports, each of which outputs one of the plurality of first optical signals divided by the first optical coupler and inputs a second optical signal, an output port which outputs the second optical signal, and a second optical coupler, provided between the input port and the first optical coupler or between the first optical coupler and the input/output ports, which provides the first optical signal to the input/output ports and the second optical signal to the output port.

Abstract: An apparatus and a method are described for compressing/expanding a pulse period of an optical pulse or packet signal. The apparatus includes a chirp light generator for generating a chirp light of a wavelength which changes linearly from a first predetermined wavelength to a second predetermined wavelength for every predetermined number of pulses of the optical signal, a wavelength converter for generating a wavelength-converted optical signal by wavelength-converting the optical signal with the chirp light, and a wavelength dispersion device causes a propagation delay due to the wavelength dispersion to the wavelength-converted optical signal.

Abstract: A method of and system a system for generating scan lines having different beam characteristics. In one embodiment, the beam is focused at different distances depending upon the scan line. A system may comprise a light source generating a reading beam, a suitable scanning mechanism such as a polygon mirror having a plurality of mirror facets, a beam correction plate in the beam path mounted to the facet wheel and rotating therewith. The reading beam passes through the correction plate and is then reflected off the mirror facet, the correction plate adjusting a beam characteristic, such as beam focus, scan angle, or beam power, for each mirror facet or portion of a mirror facet.

Abstract: A scanning and image forming lens system in an optical scanning apparatus optical scans a surface to be scanned by deflecting a luminous flux emitted from a light source in a direction corresponding to a main scanning direction via an optical deflector at equiangular velocity. The scanning image forming lens system transmits the luminous flux deflected by the optical deflector so as to condense the luminous flux into an optical beam spot on the surface to be scanned and to scan the surface to be scanned with the optical beam spot. The scanning image forming lens system includes one or more image forming optical elements including at least one lens. At least one lens surface of the at least one lens of the scanning image forming lens system has a non-arc shape in a sub scanning cross section.

Abstract: Method and apparatus are contemplated for electrical-to-optical conversion coupled to an electrical switching fabric, wherein the number of lasers supplying optical carrier beams in electrical-to-optical conversion is less than the number of optical modulators. Cost savings for a reduced number of lasers may be considerable. Further, the shared laser bank supplying optical carrier beams may comprise shared control and monitoring electronics, resulting in a further cost savings. The shared laser bank may comprise at least one redundant laser. Optical modulators may be grouped into modules for ease of replacement and further cost savings. Optical signal conditioning may be applied to the lasers, and the conditioned beams may be shared among the modulators. Soliton pulses may be generated at a desired data rate, distributed to form a plurality of distributed pulse trains, and each pulse stream may be modulated with information from the same or different information channels.

Abstract: A new DMD device and method for non-contacting edge-coupled hidden hinge geometry is disclosed, whereby no physical contact between the mirror or underlying yoke and landing pads at the surface of the CMOS substrate is required. This eliminates the problem of “sticking” mirrors found in conventional devices, and as a result simplifies the manufacturing process by reducing the requirements for delicate passivation coatings and costly hermetic packages. In this new DMD structure, a capture electrode 24 is provided at an appropriate elevation above the surface of the device so as to be in close proximity with the continuous edge of the mirror 20 or yoke 22 when it rotates into the region of the desired angle. This capture electrode 24 and mirror assembly is biased such as to establish a very high electrostatic attraction between the two which in turn stops the mirror as it comes into the plane of the capture electrode.

Abstract: For realizing an optical member for vacuum ultraviolet with little absorption and with a low deliquescence nature and a low cleavage nature, a halide of an alkali metal such as Li, Na, Cs, or the like and a halide of any one of alkaline earth metals and other elements such as Ca, Sr, Ba, Mg, Zn, and the like are mixed in a ratio of 1:1, the mixture is sintered, and a fluoride crystal of AMF3 type perovskite structure is grown. The crystal is processed to fabricate a substrate of an optical member such as a lens, a mirror, a prism, or the like for excimer lasers. Alternatively, the crystal is used as an evaporation source to coat a substrate of an optical member therewith. It is thus feasible to obtain optical members with little absorption in the vacuum ultraviolet region and with an excellent durability.

Abstract: The present invention concerns a method and an apparatus for scanning a specimen (1) with a light beam (2) of a light source (3), preferably in confocal scanning microscopy, the light beam (2) being deflected with a beam deflection device (4) and the scanning operation being controlled by a control device (5). A specimen can be scanned with the greatest possible timing accuracy in order to trigger a measurement operation, during or shortly after an external influence. The method and the apparatus according to the present invention are characterized in that as a function of at least one definable scan position (10), the control device (5) makes available at least one signal (11) for influencing the specimen (1) and/or for triggering a measurement operation.

Abstract: The quality of image produced by confocal microscopy, and especially scanning laser confocal microscopy, is enhanced especially for images obtained in turbid mediums such as many biological tissues specimens, by reducing speckle from scatterers that exist outside (above and below) the section which is being imaged by utilizing reduced coherence illumination, such as provided by a multi-mode laser. The laser beam is focused to provide its intensity in lobes forming offset spots in opposite (180°) amplitude phase relationship. The lobes are combined in the return light from the section and detected after passing through the confocal aperture of the confocal microscope. Images can be formed from the detected return light. Light from scatterers outside the section of interest, which are illuminated by both of the lobes beams overlap outside the section and interfere, thereby reducing speckle due to such scatterers, and particularly scatters which are adjacent to the section being imaged.

Abstract: An zooming adjustment mechanism for an optical system is provided for reducing the length of the optical system along its optical axis, and enable the size down of the optical system. A cam ring is provided for adjusting distances between a first lens and a second lens that are constituting a telescope optical system in a binocular. Each of a first cam groove and a second cam groove includes two grooves. Two first cam grooves and two second cam grooves are formed on an outer circumferential surface at a distance along the circumferential direction. The two first cam grooves and the two second cam grooves are formed on the same area of the circumferential direction about the axis of the cam ring, i.e., the axis of a main shaft direction.

Abstract: An optical device comprising a window or a viewing screen (18), a housing (24), and optical means (16) receiving radiation which penetrates into the housing by passing through the window or the screen, or producing and emitting radiation which leaves the housing by passing through the window or the screen, the device being characterized in that the housing is completely filled with silicone (20, 22).

Abstract: Bi-directional wavelength interleaving optical isolators provide the ability to pass a first set of optical signals (e.g., ITU even channels) from a first port to a second port, while preventing a second set of optical signals from passing thereto. The bi-directional wavelength interleaving optical isolators also pass the second set of optical signals (e.g., ITU odd channels) from the second port to the first port, while preventing the first set of optical signals from passing thereto. Thus, the bi-directional wavelength interleaving optical isolator can provide bi-directional communications by passing a first set of signals in a first direction and a second set of signals in a second direction.

Abstract: The object of the present invention is to provide a wire grid type polarizer formed of an inexpensive material in a comparatively simple process. A wire grid type polarizer of the present invention comprises: a substrate which prevents light in a specific wavelength range from being transmitted therethrough; and a photoresist layer provided on a surface and a back of the substrate, wherein parallel line patterns having a plurality of concave-convex portions are formed on the photoresist layer to be in parallel with each other on the surface and the back of the substrate, and a metal is deposited only over a top of a convex portion of the parallel line patterns having the concavo-convex portions formed on the surface and the back of the substrate and in the vicinity thereof so that a wire grid is formed on the surface and the back of the substrate.

Abstract: A birefringent device has a polarization separating device configured to separate a first composite light beam into first and second components thereof. The first and second components are orthogonally polarized with respect to one another. A first path is configured to transmit the first component and has a first optical path length. Similarly, a second path is configured to transmit the second component and has a second optical path length. The second optical path length is different from the first optical path length. A polarization combining device is configured to recombine the first and second components so as to form a second composite light beam. The second composite light beam is birefringent with respect to the first composite light beam.

Abstract: A low dispersion comb filter or interleaver assembly has a first interleaver element and a second interleaver element. The first interleaver element is configured so as to provide a dispersion vs. wavelength curve wherein each dispersion value thereof is approximately opposite in value to a dispersion value at the same wavelength for the second interleaver element, so as to mitigate net or total dispersion in the interleaver assembly.

Abstract: Conformable cube corner retroreflective sheetings comprising a plurality of discrete cube corner segments which are conformably bonded together, each cube corner segment comprising a plastic body portion having a substantially planar front major surface and at least one minute cube corner retroreflective element projecting rearwardly from the body portion and defining a cube corner point side of the cube corner segment. The peripheries of the cube corner segments can be defined by a plurality of separations extending from the cube corner point sides to the front major surfaces, the separations being disposed between adjacent cube corner segments. Adjacent cube corner segments are conformably bonded together in the sense that they are either: (1) separated by a gap of less than about 1 millimeter and bonded together through a conformable carrier layer; or (2) separated by a gap which is substantially filled with a conformable resin that bonds the side walls of adjacent cube corner segments together.

Abstract: A method and system for providing an improved color image wherein a broad spectrum light is supplied to a phase grating which provides dispersed light having multiple diffraction orders. The dispersed light is supplied to a zero-order phase shifter which shifts the phase of the undiffracted (zero order) light relative to the diffracted light. The light from the phase shifter is thereupon concentrated so that the plane of the phase grating is imaged onto a display having a plurality of pixels assigned to transmit different spectral regions. The depths of the grating elements of each of the grating periods of the phase grating and the depth of the zero-order phase element of the phase shifter are selected to maximize the area of chromaticity space spanned by the different spectral regions at the display.

Abstract: A coloring structure includes a light-reflecting base, a brilliant layer placed on the base, and transparent brilliant units contained in the brilliant layer, each brilliant unit including an alternate lamination of at least two polymers having different refractive indexes, the lamination producing interfered light resulting from reflection and interference of light and transmitted light resulting from transmission of light, each brilliant unit controlling interfered and transmitted lights. The coloring structure is provided with a coloring mechanism for producing at least an interference color resulting from interfered light, a first object color resulting from reflection of transmitted light produced by the base, and a second object color resulting from reflection of incident light produced by the base without striking any brilliant units.

Abstract: An optical film has a transparent film, an adhesive layer provided on one surface of the transparent film, the adhesive layer having a refractive index different by 0.1 or less from that of a layer of the one surface of the transparent film, and a repetitive prismatic structure provided on the other surface of the transparent film, the repetitive prismatic structure having optical path changing slopes aligned in a substantially constant direction at an inclination angle in a range of from 35 to 48 degrees with respect to a plane of the transparent film. Another optical film has a transparent film having an average in-plane retardation of not larger than 30 nm, an adhesive layer provided on one surface of the transparent film, the adhesive layer having a refractive index different by 0.12 or less from that of a layer of the one surface of the transparent film, and the repetitive prismatic structure provided on the other surface of the transparent film.

Abstract: A beam homogenizer at least includes a first optical lens for dividing a light beam into N(n′−1) beams in a vertical direction, a second optical lens for dividing the light beam into (2n+1) beams in a horizontal direction, a third optical lens for recombining the beams that are divided in the vertical and horizontal directions into (n′−1) beams while superimposing the (n′−1) beams so that they are deviated from each other in the horizontal direction, and a fourth optical lens for recombining the beams that are divided in the vertical direction.

Abstract: A diopter adjusting device includes a diopter adjusting lens which is guided in an optical axis thereof; a cam member which is provided rotatable about an axis which is parallel to the optical axis of the diopter adjusting lens, the cam member being provided with a cam surface on an end surface thereof; a motion-transmission lever which is rotatable about a lever axis, the lever axis being positioned between the diopter adjusting lens and the motion-transmission lever and lying on a plane normal to the optical axis; a cam follower portion and an engaging portion formed on one and the other ends of the motion-transmission lever to be engaged with the cam surface and the diopter adjusting lens, respectively; and a spring for constantly bringing the cam follower portion into contact with the cam surface.

Abstract: An optical element includes a lens holder, and an optical lens integrally held by an inner wall portion of the lens holder and having a lens optical surface at an opening in the lens holder in the direction of the optical axis of the optical lens. A projecting portion is formed in the inner wall portion of the holder and adjacent to the opening. An outer peripheral edge surface is placed of the lens optical surface is placed under the projecting portion and is pressed in contact with the projecting portion over the entire periphery.

Abstract: A counter-rotating anamorphic prism pair assembly with variable spacing allows the simultaneous adjustment of a prism pair using an adjustment member to circularize in cross section a range of elliptical laser beam cross sections. A first prism rotates and translates towards or away from an incident laser beam while a second prism simultaneously rotates towards or away from the laser beam in a fixed counter-rotating relationship with the first prism. The degree of rotation and translation is determined by a mechanical linkage connecting the two prisms.

Abstract: An optical filter comprises a transparent support and at least one filter layer. The optical filter has an absorption maximum in the wavelength region of 560 to 620 nm. The optical filter also has another absorption maximum in the wavelength region of 700 to 1,200 nm. A plasma display panel having a display surface covered with an optical filter is also disclosed.

Abstract: A color filter that is adapted to be changeably used for a twisted nematic (TN) mode LCD and a in plane switching mode (IPS) mode LCD by forming a light-shielding layer at the rear side of a transparent substrate to improve a surface morphology. In the color filter, a light-shielding layer is formed from a metal material on a second surface of a transparent substrate having first and second surfaces to have a lattice shape. First, second and third filters are formed at a portion which does not correspond to the light-shielding layer on the first surface of the transparent substrate in such a manner to has a desired portion overlapped with the light-shielding layer, thereby transmitting red, green and blue color lights, respectively. Accordingly, the light-shielding layer is formed on the second surface of the transparent substrate to prevent a deterioration of surface morphology.

Abstract: A single ended differential input amplifier is used as the initial amplification stage of a preamplifier used in the read channel of a hard disk drive (HDD) application. Over the usable bandwidth of the read channel (typically between about 1 to 100 megahertz), prior art single ended differential input amplifiers are susceptible to noise coupling from the power supply. The invention enhances the power supply noise rejection (PSR) ability of single ended differential input amplifiers by adding a resistor in series with the capacitor that is usually coupled across one leg of the differential amplifier. As the frequencies across the usable bandwidth increase and the capacitor tends to short, the added resistor is effective to maintain impedance without affecting the gain of the amplifier.

Abstract: Side-reading of an abutted-junction magnetic transducer is measured by constructing at least one microtrack having a transition density. The transducer is moved relative to the microtrack to identify a plurality of positions of the transducer relative to the microtrack where the transducer provides a predetermined response. The side-reading distance of the transducer is identified from the plurality of positions. In one embodiment, a plurality of microtracks are constructed during different iterations, each having a different transition density, and the positions of the transducer are identified during each iteration relative to the respective microtrack. In another embodiment, the selected transition density has a fundamental frequency, and the position of the transducer is identified relative to the microtrack where the transducer provides the predetermined response at each of a plurality of harmonic frequencies of the fundamental frequency.

Abstract: A read/write head servo control system for data recording devices, wherein a method of compensating initial values is utilized to generate a control signal to move the head from an initial position to a target position. The method estimates and stores multiple position compensation values. A first control signal moves the head from an initial position to a target position. Head position values are sampled as the head moves. Head position deviation values are calculated for the sampled position values. The head position values are utilized to select a set of estimated position compensation values. These values are in turn utilized to generate a second control signal, which is then utilized to control the position of the head.

Abstract: Disclosed is a cabinet structure for a magnetic tape recorder having a rear-and-bottom structure to which a deck of the magnetic tape recorder is to be fixed. At least selected part or parts or the whole of the rear-and-bottom structure are of a sheet of metal capable of providing a shielding effect.

Abstract: An index signal output device where a magnetic flux detector is moved in the direction of a relevant tangent to the circumference of a rotor yoke so that the phase difference between an index signal detected by the magnetic flux detector and an index reference signal previously recorded on a floppy disk is within a prescribed range. The lead terminals of the magnetic flux detector are connected to detection signal output terminals on a printed circuit board, and the magnetic flux detector is moved for adjustment in the direction of the tangent by flexing the lead terminals using a tool.