Abstract: A method for representing a digital image in an extended CMYK color space that has an extended color gamut. The image is for output to an output device that uses a set of more than four colorants and is capable of reproducing the extended color gamut. The method includes providing a transformation from the extended CMYK color space to amounts of each of the set of colorants of the output device, providing a device profile for the extended CMYK color space that is associated with the transformation and that provides for converting a first color represented by a first set of color coordinate values in a first color space into a set of CMYK values in the extended CMYK color space such that the output device behaves as if it was a CMYK device with the extended CMYK values, and representing the digital image in the extended CMYK color space.

Abstract: A method and apparatus for performing color halftoning using block quantization is disclosed. In one embodiment, the method comprises dividing an input image into a plurality of blocks, clustering pixels in each of the plurality of blocks into a plurality of color groups, block quantizing each of the plurality of color groups for each of the plurality of blocks to a representative color value, and creating an output halftone image having a distinct block associated with each block in the plurality of blocks, with the representative color value for each group in each distinct block being approximated over a spatial area covered by the group in said each distinct block.

Abstract: Image capture device control marks are automatically generated within a computer or printer and automatically printed on pages output from the printer. The control marks when detected by a control mark capable image capture device communicate information to the image capture device such as which areas of the printed page are text that require optical character recognition, which areas of the page are photos that require high-resolution full-color, which areas of the page are line drawings that require medium-resolution black and white, and which areas of the page are not to be scanned. Image capture device control marks may be configured in a wide range of sizes, styles, and locations on the printed page.

Abstract: Where the bandwidth of a data link between a printer and a computer is limited it may be desirable to transmit compressed page layout data over the data link. A printer controller chip is provided that processes compressed page layout data corresponding to a page layout having a bi-level black layer and a continuous tone graphics layer. The printer controller includes a number of functional modules including an edge delta runlength (EDRL) expander to derive bi-level black layer data from the compressed data. The controller also incorporates a JPEG decoder to derive continuous tone layer data from the compressed data. A halftoner and compositer module is provided to halftone the continuous tone data to bi-level CMYK data and to composite the bi-level layout data over the bi-level CMYK data to produce page layout print data. A printhead interface processes the page layout print data to generate signals to drive a pagewidth printhead.

Abstract: The present invention relates to an image processing method using the error diffusion method to prevent jumps in a highlight part and darkening in a shadow part at high resolution. The image processing method comprises a step of calculating an average value of density values of N×M (N, M>1) pixels, a step of adding the average value and a diffused quantization error value, a step of quantizing the addition result with a predetermined number of tones, a step of selecting a quantization pattern corresponding to the quantization result, and a step of calculating the diffused quantization error value from the quantization error. The error diffusion algorithm has flexibility in outputting dots. In other words, error diffusion processing is performed in N×M pixel units, and a plurality of quantization patterns are provided, and a quantization pattern is selected based on the quantization result.

Abstract: A specific number of adjacent pixels are combined into blocks. The tone values of the pixels in a target block are detected when the dot on-off state is determined, and the fact that the target block does or does not satisfy specific processing conditions is confirmed based on the relation between the magnitudes of the tone values thus detected. The dot on-off state is determined for the target block in block units if the target block satisfies the processing conditions. The conversion procedure can be rapidly performed by adopting this approach. The dot on-off state is determined for the pixels of the target block if the processing conditions are not satisfied. Image quality is thereby prevented from being adversely affected. Image quality can thus be preserved and image data rapidly converted to a specific expression format based on the dot on-off state by performing the conversion procedure in accordance with an appropriate method selected based on whether the processing conditions are satisfied.

Abstract: An image processing apparatus processes image data which is obtained by reading an halftone dot image. In the image processing apparatus, the image data is separated into the image data corresponding to halftone dots which form the halftone dot image and other image data. On the image data corresponding the halftone dots, the smoothing process is performed, and on the other image data, the edge enhancement is performed. Both of image data are synthesized and outputted. Since only the separated image data corresponding to halftone dots are smoothed out, it is possible to suppress creation of a moiré due to the halftone dot image which is an aggregation of the halftone dots, without influencing the smoothing processing upon the character portion in the vicinity of the halftone dots. On the other hand, since the other image data are edge-enhanced, the character portion, a line and the like show sharp and legible.

Abstract: Edge delta runlength (EDRL) compression algorithms may be employed to compress bi-level black print data, such as data representing text. A printer capable of rapidly decoding the compressed EDRL data includes a decoding circuit to produce delta signals. An edge calculation circuit in turn operates on the delta signals to produce runlength data which is subsequently transformed into image line data by a runlength decoder circuit.

Abstract: In a photosensitive imaging apparatus having multiple chips, each chip having a set of photosensors, chips of a single basic design can be instructed to operate consistently with either parallel or serial readout of the apparatus. Signals on a shift register line associated with each chip are recognized, by on-chip circuitry, as an instruction to operate the chip in either a parallel or a serial manner.

Abstract: An imaging system, which may be applied both to black and white and color imaging systems and comprising a platen member which defines an imaging portion and a calibration portion is disclosed. The imaging portion and the calibration portion comprise separate portions of the platen member. The platen member is supported by a movably mounted support member, and moves with the support member between a platen member calibrating position and a platen member imaging position. The platen member is dimensioned to support a sheet to be imaged. An imaging module with an imaging zone is supported in a position where the imaging zone is positioned to coincide with a portion of a sheet supported on the imaging portion of the platen member, when the platen member is in the platen member imaging position. A calibration member having a reference reflectivity is adhered to the calibration portion of the platen member.

Abstract: An image reading apparatus having an illuminating device for illuminating a film original, an image reading device for reading an image on the film original illuminated by the illuminating device and outputting image signals. The image reading apparatus further includes a type discriminating device for discriminating whether the film original is a first film original or a second film original having different film sizes, and a reading scope modifying device for modifying the reading scope of the image reading means according to the result of discrimination of the type discriminating means.

Abstract: An image reader is constituted by an image sensor having a plurality of image sensor ICs mounted therein linearly, wherein the plurality of image sensor ICs are divided into a plurality of blocks to read image signals of the blocks in the same period, and adjacent light receiving elements of the adjacent image sensor ICs between the blocks are arranged so as to be spaced from each other in a sub-scanning direction in such a way that the reading areas of the image signals which are to be read in the same period in the sub-scanning direction become identical to each other. Thus, no continuousness of an image is distorted even in a joint between the adjacent blocks.

Abstract: A scheme for obtaining an original image free from any dust or scratches on a film by scanning a film original or the like with visible light and infrared light has been proposed. This scheme suffers problems, i.e., a large memory size and long processing time since original image data obtained by infrared light must be stored. To solve such conventional problems, this invention provides, e.g., an image scanning apparatus which has a light source for emitting visible light and invisible light, scanning means for scanning an original image irradiated with light emitted by the light source, and control means for controlling the scanning means to scan the original image irradiated with the invisible light, and then to scan the original image irradiated with the visible light.

Abstract: A system and method for scanning a photographic film using a scanner automatedly identifies the film as either a positive or negative and controls the scanner settings to perform the scan accordingly. The method includes performing a pre-scan of the film, sampling a color density of at least one location of the film, comparing the color density to a standard range indicating an orange bias for the at least one location, and setting the scanner to treat the film as a negative if the color density is within the standard range and to otherwise treat the film as a positive.

Abstract: A document transfer device for transferring a document to a document stop reference position includes a supply port disposed on an end of the contact glass; the first supply path for guiding the document supplying through the supply port to a downstream side along the contact glass; a contact glass cover forming the first supply path together with the contact glass and covering a part of the contact glass; and the second supply path joining the first supply path near a downstream side of the contact glass cover. The transfer device transfers the document from the first supply path or the second supply path to the document stop reference position.

Abstract: A bracket that rotatably supports a shaft provided along the axis of a back roller for feeding and thereby transporting a document pinched between the back roller and a close-contact-type image sensor elastically supported on a cabinet and that is fitted to the cabinet so as to be rotatable about the shaft is formed integrally with a release lever for releasing the back roller and the close-contact-type image sensor from a state in which they are pressed against each other.

Abstract: Holographic media for storing and reading holographic data is provided having one or more external or internal surfaces having structures for at least one of minimizing reflections from illumination incident the surface, or enhancing adhesion between surfaces within the media. Structures for minimizing reflections represent a grating pattern of subwavelength structures providing low reflectivity at the operating characteristics of holographic optical systems to use the media, such as spectral bandwidth, angular bandwidth, and polarization of illumination incident the media. Adhesion promotion may be provided by structures along an interior surface of the media, such as along an interfacing surface between photosensitive material of the media and a substrate material adjoining the photosensitive material. Such adhesion promotion may be provided by such structured surface with or without providing low reflectivity at the operating characteristics of holographic optical systems to use the media.

Abstract: High quality images are provided without the occurrence of image quality defects due to reciprocity law failures, even when scanning a multi-beam. When interlaced scanning is employed, it is possible to select combinations such that, taking any freely selected neighboring scanning lines, respective scan numbers of the neighboring scanning lines are always different. Thus, a duration of scanning spacing can be made to be at least the duration of a single main scan. As a result, image defects such as banding due to reciprocity law failures can be greatly alleviated, and images can be provided in which image defects are to unlikely to be noticed in practice.

Abstract: An optical scanner includes a light source, an optical coupler, an optical line image unit, a deflector, and an optical scanning unit. The optical scanning unit includes scanning lenses that guide the beams to a surface to be scanned. A surface on the deflector side of the scanning lens closest to a deflection reflecting surface has a negative power in a vertical scanning direction, and is a special toric surface in which a radius of curvature in a vertical scanning changes from an optical axis of the lens surface toward a periphery of the horizontal scanning direction. An F number of the beams toward the surface to be scanned of the scanning lens in the vertical scanning direction is larger in a peripheral part than in a central part in an effective scanning width.

Abstract: In an lens of a scanner unit, a first incidence surface of a first lens is formed as an aspherical surface rotationally symmetrical with respect to an optical axis while a first emergence surface is formed as a shape asymmetrical in a main scanning direction with respect to the optical axis and having a curvature asymmetrically variable in a sub scanning direction with respect to the optical axis. Each of second incidence surface and second emergence surface of a second lens is formed as a shape symmetrical in the main scanning direction with respect to the optical axis and having a curvature symmetrically variable in the sub scanning direction with respect to the optical axis. A mold for the lens can be produced easily when only the first emergence surface of the first lens can be formed as an asymmetrically variable shape.

Abstract: A scanner for obtaining an image of an object placed on an at least partially transparent platform, wherein the platform is defined by edge portions and has at least including a first scan area and a second scan area. In one embodiment, the scanner includes a white area formed at least partially around the edge portions of the platform with a plurality of markers, optical means for sequentially scanning consecutive partial images of the object from the first scan area and the second scan area, respectively, wherein each of the consecutive partial images include an image of at least one of the plurality of markers, and an image processing system for using the image of the at least one of the plurality of markers in each of the consecutive partial images as a reference to combine the consecutive partial images so as to form a substantially complete image of the object corresponding to a full scan of the first scan area and the second scan area.

Abstract: Disclosed is a laser processing apparatus and method for enhancing processing efficiency of an object by means of a polygon mirror. The laser processing apparatus includes a laser generator outputting a laser beam with a predetermined diameter, a polygon mirror rotating on an axis with plural reflection planes to reflect the laser beam incident on the reflection planes from the laser generator, in which the number of the reflection planes is set in order that the laser beam can cover at least two reflection planes of the polygon mirror, and a lens condensing and irradiating the laser beam reflected from the polygon mirror. According to the present invention, it is able to improve the processing efficiency and product yield of an object by dividing the laser beam into the plurality to be incident on the reflection planes of the polygon mirror and repeatedly processing the object in low energy by means of the divided laser beam.

Abstract: A package is made of a transparent substrate having an interferometric modulator and a back plate. A non-hermetic seal joins the back plate to the substrate to form a package, and a desiccant resides inside the package. A method of packaging an interferometric modulator includes providing a transparent substrate and manufacturing an interferometric modulator array on a backside of the substrate. A back plate is provided and a desiccant is applied to the back plate.

Abstract: An aberration compensating device for compensating aberration of a laser beam emitted from a light source and converged on an optical recording disk through an objective lens includes a liquid crystal panel including a liquid crystal layer and transparent electrodes disposed so as to interpose the liquid crystal layer therebetween and a liquid crystal panel control part for controlling an applied voltage which is applied to the transparent electrodes. The transparent electrode includes a center part and a plurality of outer peripheral divided parts divided around the center part. When the diameter of an incident area of the laser beam corresponding to the pupil diameter of the objective lens on the liquid crystal panel is set to be “D1” and the diameter of the center part is set to be “D2”, (D2/D1) is set at a value in the range from about 0.5 to about 0.65.

Abstract: A spatial light modulator has a substrate; a movable member which is disposed so as to hang across the substrate in a displaceable manner and has a conductive section provided in at least a portion of the movable member; an optical function film which follows mechanical displacement of the movable member and is fixed to the same; and a drive fixed electrode which is disposed outside a range of mechanical displacement of the movable member and displaces and drives the movable member. Electrostatic attractive force is generated between the movable member and the driving fixed electrode by applying a drive voltage between the conductive section of the movable member and the driving fixed electrode, thereby displacing and driving the movable member, bringing the same into a stationary state in a non-contacting manner, and modulating light radiated on the optical function film.

Abstract: An image exposure system is formed by a spatial light modulator element comprising a number of two-dimensionally arranged pixel portions each modulating light projected thereon, a light source which projects light onto the spatial light modulator element and an imaging optical system which includes a micro lens array and forms on a photosensitive material an image of light modulated by the spatial light modulator element, the micro lens array being made up of micro lenses which are arranged like an array and collect light from the pixel portions of the spatial light modulator element. Each micro lens of the micro lens array has an aspherical surface or a refractive index profile which corrects aberration due to distortion of the pixel portions or has a shape of lens aperture which does not permit light from a periphery of each of the pixel portions of the spatial light modulator element.

Abstract: An optical microelectromechanical (MEMS) device includes a conductive layer, a dielectric layer, a reflective layer and a plurality of supporters between the dielectric layer and reflective layer. The supporters are tapers, or inversed tapers, having an acute angle, wherein a side surface of one of the supporters and the surface of the dielectric layer form the acute angle. Each supporter comprises a horizontal extending portion connecting to the reflective layer, such that the reflective layer is suspended from the dielectric layer by a predetermined gap.

Abstract: Wavelength conversion devices for converting fundamental waves to light of a different wavelength are provided. The devices have a wavelength converting layer comprising a plate-shaped body of a non-linear optical crystal having a first main face and a second main face. A supporting body is joined with the first main face of the wavelength converting layer. An additional supporting body may also be joined with the second main face of the wavelength converting layer.

Abstract: An optical parametric amplifier (OPA) driven with at least two pump waves. The pump waves may be configured such that the OPA produces uniform exponential gain over a range of wavelengths that extends, for example, at least 30 nm on either side of the average pump-wave wavelength. In addition, since the Brillouin scattering limit applies to each pump wave independently, substantially twice the amount of energy may be pumped into an OPA of the present invention compared to that in the corresponding single pump-wave OPA of the prior art. An OPA of the present invention may be used in a WDM communication system and configured for simultaneous signal amplification and wavelength conversion.

Abstract: A method, apparatus and system for controlling power transients in amplified optical transmission system includes, in response to the detection of a power transient in an optical signal, varying a gain of at least one amplifier to correct for a time delay in a gain response associated with a gain change in an amplifier. Alternatively, the method, apparatus and system further include in response to the detection of the power transient, adjusting the gain of at least one amplifier to correct for a change in signal power.

Abstract: Electronic binoculars comprise an imaging unit, and first and second ocular units. The imaging unit has an imaging device that projects an optical image of an object, and converts the optical image to electric signals. The first ocular unit has a first image-indicating device that indicates the object image based on the electric signals in a first image-indicating field. The second ocular unit has a second image-indicating device that indicates the object image based on the electric signals in a second image-indicating field. The first image-indicating field is smaller than a first effective image-indicating area which is the maximum image-indicating area of the first image-indicating device. The second image-indicating field is smaller than a second effective image-indicating area which is the maximum image-indicating area of the second image-indicating device. The respective first and second image-indicating fields can move within the respective first and second effective image-indicating areas.

Abstract: A polarizing eyeglass device is disclosed which achieves improvement in compatibility and also in convenience in use when it is used to view an image displayed on an image display screen of a stereoscopic image display apparatus. The polarizing eyeglass device includes a polarized light separation means for separating particular polarized light. The polarized light separation means includes a first viewing region to be used for viewing with one of the left and right eyes and a second viewing region to be used for viewing with the other eye. A first polarization direction changing means is adhered to a first face of the polarized light separation means in the first viewing region. A second polarization direction changing is adhered to a second face opposite to the first face of the polarized light separation means in the second viewing region.

Abstract: A polarizing filter has a laminate structure: wherein one to four layers of first dielectric thin films 1 and one to four layers of second dielectric thin films 2 are alternately laminated on a transparent flat substrate 10 to form the laminate structure, the layers of second dielectric thin films 2 having a refractive index lower than that of the first dielectric thin films 1 with respect to the wavelength of incident light; wherein one layer of the third dielectric thin film 3 having a refractive index intermediate between the refractive indices of the first and second dielectric thin films with respect to the wavelength of incident light is laminated on a surface of the laminate structure. In an optical device using the polarizing filter, the angle of incidence is set to be in a range of from 20 to 70 degrees.

Abstract: An image stabilization apparatus comprises a housing accommodating an optical system in the interior thereof. A part of optical members that compose the optical system is held to allow angular displacement relative to the housing, and the position of the part of the optical members is maintained in a predetermined state. The part of the optical members is driven to restore the position angularly displaced. A driving amount is controlled based on information of the angular displacement. A mode for controlling the housing that is suitable for vibration applied to the housing is determined, and the mode is informed to a user.

Abstract: A polarization diffraction grating includes two media having different orientation states arranged alternately and cyclically, wherein each boundary between the media forms an oblique rectangular shape.

Abstract: A method and apparatus f or performing an assay process, featuring providing microbeads in a solution; placing the microbeads on an alignment substrate; reading codes of the microbeads and the position thereof on the alignment substrate; reading the fluorescence on each microbead and the position order thereof on the alignment substrate; and determining an assay result based on bead position order and bead code of the earlier reading steps, where the microbead is an encoded particle having a particle substrate; a portion of the substrate being made of a substantially single material and having at least one diffraction grating embedded therein, the grating having a resultant refractive index variation within the single material at a grating location; and the grating providing an optical output signal indicative of a code when illuminated by an incident light signal propagating from outside said substrate, the optical output signal being a result of passive, non-resonant scattering from said grating when illumi

Abstract: An electromagnetic radiation diffuser, operative at extreme ultraviolet (EUV) wavelengths, is fabricated on a substrate. The diffuser comprises a randomized structure having a peak and valley profile over which a highly reflective coating is formed. The reflective coating substantially takes the form of the peak and valley profile beneath it. An absorptive grating can be fabricated over the reflective coating. The grating spaces will diffusely reflect electromagnetic radiation because of the profile of the randomized structure beneath. The absorptive grating will absorb the electromagnetic radiation. The grating thus becomes a specialized Ronchi ruling that may be used for wavefront evaluation and other optical diagnostics in extremely short wavelength reflective lithography systems, such as EUV lithography systems.

Abstract: An optical system employs an optical coating on a substrate positioned relative to an optical collection system. The thickness of the coating is tailored such that light perceived by the collection system over prescribed angles of acceptance has a spectral content that is unchanged, or changed in a prescribed manner, from that entering the system when the sensor is oriented in the “look ahead” direction. The thickness of the coating is varied so that the wavelengths transmitted or reflected correspond to those required by a specific application. The invention is adaptable to system requirements that are centered about a single wavelength, or that require multiple wavelengths. The optical coating can take any of a number of forms, including stacked dielectric layers and rugate filters.

Abstract: A brightness enhancing structure for a reflective display. A plurality of transparent hemi-beads form a film substantially covering and protruding inwardly from the structure's inward surface. A corresponding plurality of microstructured toroidal lenses are provided on the structure's outward side. Each lens is optically coupled to an adjacent one of the hemi-beads to redirect incident light rays toward the adjacent hemi-bead, such that the redirected light is totally internally reflected by the hemi-bead and reflected back in a direction approximately opposite that of the incident rays. This substantially reduces undesirable dark, non-reflective circular regions of each hemi-bead which would otherwise exist in the absence of this invention.

Abstract: A container for producing a graphical image within the container. The container includes a container wall with a front portion and a rear portion. A label is included that extends about the circumference of the container with an inner surface contacting an exterior surface of the rear portion of the container wall and contacting an exterior surface of the front portion of the container wall. The label includes a lenticular lens array integral with the label to include a plurality of lenses formed, such as through embossing, on the outer surface of the label. The lenses have a focal point on or about the rear portion of the container wall with the lenticular lens array positioned near the front portion of the container wall. A printed image is provided and positioned proximal to the focal point on the inner surface of the label.

Abstract: A zoom lens system comprises, successively from the object side, a first negative lens group and a positive second lens group. The first lens group includes a negative meniscus lens and a positive meniscus lens, the negative meniscus lens and the positive meniscus lens each has at least one aspherical surface. The second lens group includes a first positive auxiliary group and a positive second auxiliary group. The refractive power of the first group is 1/f1, the refractive power of the second group is 1/f2, the focal length of the whole lens system fw when the distance between the lens groups is increased, fT is the focal length of the whole lens system when the distance between the lens groups is decreased, and they satisfy the following conditional expressions of: 0.9?|f1|/(fw·fT)1/2?1.1 and 1.15?|f1|/f2?1.35.

Abstract: A three-group zoom lens includes five lens components and six lens elements. The first lens group from the object side has negative refractive power and both the second lens group, which includes a stop, and the third lens group from the object side have positive refractive powers. The first and second lens groups each include an aspheric surface. During zooming, the first lens group moves nearer the second lens group while the second lens group moves farther from the third lens group. The third lens group moves toward the object side when focusing from an object at infinity to a nearby object. The three lens groups have particular lens element constructions, and lens elements of the second and third lens groups satisfy certain conditions related to their focal lengths, Abbe numbers, and the focal length of the zoom lens.

Abstract: A zoom lens system includes ‘n’ (n?3) lens groups. A first lens group that is the most object-side lens group of said zoom lens system has a positive refractive power, and a final lens group that is the most image-side lens group of the zoom lens system has a negative refractive power. The distance from the most object-side surface of the positive first lens group to the most image-side surface of the negative final lens group becomes shortest at an intermediate focal length between the short focal length extremity and the long focal length extremity.

Abstract: A first group optical system having a positive refracting power, a second group optical system having a negative refracting power, and a third group optical system having a positive refracting power are sequentially arranged from an object side toward an image side. At least the first group optical system and the third group optical system move so that a distance between the first group optical system and the second group optical system becomes minimum at short focal-length side, and a distance between the second group optical system and the third group optical system becomes minimum at long focal-length side. The third group optical system includes a triplet lens formed with a negative lens, a positive lens, and a negative lens.

Abstract: Disclosed is a zoom lens herein. The zoom lens has a first group G1 having a negative focal length, a second group G2 having a positive focal length and a third group G3 having a positive focal length in turn from an object side, and has an opening iris S for moving integrally with the second group G2 on the object side of the second group G2, wherein in variation of magnification from a short focus end to a long focus end, the second group G2 moves monotonously from image side to object side and the first group G1 moves to correct the variation in position of image surface accompanying the variation of magnification. The second group G2 consists of four elements of a positive lens L4, a negative lens L5, a positive lens L6 and a positive lens L7 in turn from the object side.

Abstract: An object is to provide an ultra-compact zoom lens system suitable for a video camera and a electronic still camera using a solid-state imaging device and the like with securing high optical performance. The zoom lens system includes, in order from an object along the optical axis, a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having positive refractive power, and at least one lens group having positive refractive power. The first lens group is fixed upon zooming from a wide-angle end state to an telephoto end state and focusing. A plurality of lens groups except the first lens group are moved upon zooming from the wide-angle end state to the telephoto end state, respectively. A plurality of lens groups except the first lens group G1 are moved upon focusing, respectively. Given conditional expressions are satisfied.

Abstract: At least one exemplary embodiment is directed to a telephoto type optical system capable of reliably correcting and/or reducing aberrations such as chromatic aberration. The optical system includes a refractive optical element which includes a solid-state material, a negative lens component and a positive lens component, respectively disposed on a front side relative to a pupil, the solid-state material meeting conditions of an Abbe number ?d(GNL) and of a partial dispersion ratio ?gF(GNL) as follows: ?2.100×10?3·?d(GNL)+0.693<?gF(GNL) 0.555<?gF(GNL)<0.9 Then, a refractive power of the refractive optical element, a mean partial dispersion ratio of a material of the negative lens component, and a mean Abbe number of a material of the positive lens component are properly set.

Abstract: The imaging lens system includes, from the object side, a diaphragm, a first lens as a positive meniscus lens whose convex surface faces the object side, and a second lens as a positive lens whose convex surface faces the image surface side, wherein the following expressions are to be satisfied 1.25?L/fl?0.8, 0.55?f1/f2 s 0.2, 1.8?f1/fl?1, 4?f2/fl?1.5, 1?d2/d1?0.5, 0.27?d1/fl?0.1, 0.27?d3/fl?0.1 (where, L: entire length of the lens system, fl: focal distance of entire lens system, f1: focal distance of the first lens, f2: focal distance of the second lens, d1: center thickness of the first lens, d2: distance between the first lens and second lens on the optical axis, d3: center thickness of the second lens).

Abstract: A lens mounting plate to which a projection lens unit is fixed is brought into contact with a sliding base. The lens mounting plate is pressed against the sliding base by the urging of a coiled spring. The pressing force is set such that the position of the projection lens unit can be held and shifted. A cover is provided with a pipe-shaped projection so as to surround the projection lens unit with a clearance corresponding to the shifting width of the projection lens unit between the pipe-shaped projection and the projection lens unit. A user shifts the position of the projection lens unit with his or her fingers laid on the pipe-shaped projection and the projection lens unit.

Abstract: A magnetic recording medium and a method of manufacturing the same which serve for stable head behavior and efficient recording of servo information. In each servo area, a magnetic layer is separated into a plurality of servo pattern unit parts for forming a predetermined servo pattern and a plurality of servo pattern gap filling parts patterned to fill gaps between the plurality of servo pattern unit parts partly. The servo pattern unit parts and the servo pattern gap filling parts are formed in different sizes so as to have different magnetic properties.