32 results about "Meridional direction" patented technology

A gas containment and supply apparatus is described consisting of a gas reservoir vessel (1) capable of pressurised gas containment fitted with a gas supply aperture (8) provided with supply means connectable to the gas supply aperture to provide for supply of the gas and control means to control the rate of supply of the gas, in which the gas reservoir is a toroidal pressure vessel comprising a metallic toroidal shell (2) having wound on its surface a tensile load bearing layer of high tensile strength non-metallic fiber (4), the fiber being aligned in a substantially meridional direction on the toroidal shell. Human portable breathing apparatus is described utilising the above.

Provided is an optical system with an excellent anti-reflection effect and ghost suppression effect including an aspherical lens having at least one of an incident surface and an exiting surface of an optical glass formed of an aspherical surface, in which: the aspherical surface includes an anti-reflection structure formed thereon, the anti-reflection structure having an anti-reflection function and including multiple inorganic structural parts finer than a used wavelength; and the aspherical surface has a point that satisfies the following expression: |(1 / Rm−1 / Rs) / Rm|>5.0×10−5, where Rm denotes a radius of curvature in a meridional direction at an arbitrary point, and Rs denotes a radius of curvature in a sagittal direction at the arbitrary point.

A pneumatic tire comprises a carcass made from at least one cord array comprised of many arch portions of a cord extending between a pair of bead portions in a meridional direction and arranged over a full circumference of the tire at an equal interval P in a circumferential direction of the tire and many circumferential portions of the cord alternately arranged in the bead portions, each connecting ends of adjacent arch portions to each other in the bead portion and extending substantially in the circumferential direction. In this case, the cord array is arranged at n layers (n is an integer of 2 or more) while offsetting these layers by a distance L obtained by dividing the interval P by n in the circumferential direction. Further, the bead wire reinforcing layer is arranged outward from the overlap region of the circumferential portions in the radial direction so as to sandwich the cord array from both sides thereof.

An image reading apparatus with an image reading lens configured to reduce a field curvature and a magnification error in the sub-scan direction, includes a photoelectric conversion element having picture elements arrayed in the main-scan direction, and an image reading lens for imaging imagewise information on a surface of an original, upon a light receiving surface of the photoelectric conversion element, the image reading lens including at least one anamorphic lens having anamorphic surfaces formed at a light entrance surface and a light exist surface thereof, respectively, wherein, when a sectional shape of the anamorphic surface in a main-scan section which contains an optical axis of the image reading lens and the main-scan direction, is taken as a meridional, a curvature of a sagittal of the anamorphic surface defined within a plane being perpendicular to the main-scan section and containing a normal to the anamorphic surface at an arbitrary position in the meridional direction, changes continuously along the meridional direction from the optical axis.

An optical device (100) is disclosed, comprising a collimator (110) and a first lenslet array (130, 430) and a second lenslet array (140, 440). The first lenslet array and the second lenslet array are provided with the same tessellation pattern, aligned with each other and arranged such that a projection (150) of a light source (122) is focused on the second lenslet array, which is configured to emit non-focused light. At least some of the lenslets of the second array are formed such that a ratio of their sagittal and meridional dimensions varies at least along the meridional direction (M) of the second lenslet array, based on the varying shape of the projection of the light source as seen by said lenslets, so as to achieve an improved mixing, intensity and uniformity of light emitted from the optical device.

The invention discloses a fibre reinforced plastic anchor net, which is formed by solidifying two layers of meridional fibre reinforced materials and a latitudinal fibre reinforced material between the two layers of meridional fibre reinforced materials. The fibre reinforced materials adopts thermoplastic plastic as base, and glass fibre or basalt fibre or carbon fiber as reinforced material, and the anchor net has high intensity. The invention also discloses a production process for continuously producing the fibre reinforce plastic anchor net, which comprises the following steps: continuous fibres dipped with thermoplastic plastic are uniformly arranged in meridional direction, then the fibres dipped with thermoplastic plastic are uniformly laid on the meridional fibre layer in latitudinal direction, then the continuous fibres dipped with thermoplastic plastic are uniformly laid on the latitudinal fibre layer in latitudinal direction, then the fibre layers are heated by a heating device to solidify the meridional and latitudinal fibre layers, and then the fibre layers are rolled by a roller and the cooled for forming.

A ball body is formed with a mold having upper and lower mold half. Dimples 16 having a shape inverted from the shape of the pimples of the mold are formed on the ball body. The dimples 16 in the vicinity of the equatorial line have a size in the meridional direction D1 being greater than a size in the latitudinal direction D2. The difference between the size in the meridional direction D1 and the size in the latitudinal direction D2 is 0.01 mm or greater and 0.50 mm or less. By grinding the ball body in the vicinity of the equatorial line, a flash generated on the seam resulting form the mold is removed. According to the grinding, the size in the meridional direction of the dimple 16 is reduced, and thus, plane shape of the dimple becomes closer to a perfect circle.

Provided are compact, high-definition, optical scanning apparatus and multi-beam scanning apparatus capable of keeping the spot size uniform in the sub-scanning direction throughout the entire, effective scanning area on a surface to be scanned. An optical scanning apparatus has an entrance optical system 11 for guiding light emitted from a light source 1, to a deflector 5, and a scanning optical system 6 for focusing the light reflectively deflected by the deflector, on a surface to be scanned 7. In the optical scanning apparatus, the scanning optical system has a plurality of sagittal asymmetric change surfaces in which curvatures in the sagittal direction change on an asymmetric basis in the meridional direction with respect to the optical axis of the scanning optical system.

An imaging device includes an imaging optical system, an image sensor, and an optical fiber bundle including optical fibers to guide light from the system to the sensor. The optical fiber bundle includes an optical fibers first and second pair, each pair having two optical fibers that are adjacent in a meridional direction. In the first and second pair of optical fibers, a first value, which is a value representing a ratio of a distance component in the meridional direction between the optical fibers centers along a light-exit surface to a distance component in the meridional direction between optical fibers centers along a light-incident surface, is greater than one. The optical fibers second pair is located farther from an optical system optical axis than the optical fibers first pair. The first value in the optical fibers second pair is greater than the first value in the optical fibers first pair.

A pneumatic tire includes at least three circumferential main grooves that extend in the tire circumferential direction, and land portions that are partitioned and formed by these circumferential main grooves. In addition, a belt layer is formed by laminating a pair of cross belts each having a belt angle of not less than 10° and not more than 45° as an absolute value and having mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of ±5° with respect to the tire circumferential direction. In addition, in a cross-sectional view taken along the tire meridian direction, a diameter D1 at a point at an edge portion on the inner side of a shoulder land portion in the tire width direction and a diameter D2 at a predetermined point within the ground-contact surface of the shoulder land portion have a relationship such that D2<D1.

The present invention relates to a blade row group arrangeable in a main flow path of a fluid-flow machine and including N adjacent member blade rows firmly arranged relative to one another in both the meridional direction (m) and the circumferential direction (u), with the number N of the member blade rows being greater than / equal to 2 and (i) designating the running index with values between 1 and N. Here, a front member blade row with front blades (i) having a leading edge and a trailing edge as well as a rear member blade row with rear blades (i+1) having a leading edge and a trailing edge are provided.

The invention discloses a laser displacement sensor, which comprises a laser, an imaging objective lens and a photosensitive element, wherein the laser is used for injecting a laser beam; light received and injected by the imaging objective lens is incident to the photosensitive element; when modulation transfer function (MTF) analysis is carried out on the imaging objective lens and the photosensitive element, the analysis result meets the following conditions: in a condition in which the main arrangement direction of multiple photosensitive units of the photosensitive element is a sagittal direction, MTFS>MTFT; in a condition in which the main arrangement direction of multiple photosensitive units of the photosensitive element is a meridional direction, MTFT>MTFS; and the MTFS is the MTF value in the sagittal direction, and the MTFT is the MTF value in the meridional direction. The objective lens design difficulty can be reduced, the manufacturing cost and the maintenance cost are saved, the measurement accuracy is improved, and bad influences caused by vibration or mechanical deformation in the case of use can be better handled.

A pneumatic radial tire has a carcass structure, a belt structure, and a tread. The belt structure has at least two plies of reinforcing cords, the cords in the at least two plies being inclined at angles greater than 5° relative to the tire centerline. The cords in the belt plies are inclined at equal but opposite directions relative to the tire centerline. The belt plies have a stiffness variation in the circumferential and meridional directions of the belt plies wherein the stiffness variation is in the range of 12 to 25% between a radially outermost belt ply and a radially innermost belt ply.

The object of the present invention is to provide a pneumatic tire which reduces the partial wear while maintaining the durability in the shoulder land portion. In order to achieve the above object, the thin groove extending in the circumferential direction of the tire on the shoulder land portion is arranged so as to be perpendicular to or inclined outward to the groove bottom from the tread surface as viewed in the cross-section of the meridian direction of the tire, and the buttress groove is arranged to position at the inner side than the groove bottom of the thin groove with respect to a normal line of the tread surface as viewed in the radial direction of the tire, at the same time, at the outer side than the inner surface of the tire as viewed in the radial direction of the tire.

The invention relates to a bidirectional elastic breathable material. The bidirectional elastic breathable material comprises a unidirectional elastic cloth and a bidirectional elastic film, wherein the unidirectional elastic cloth is provided with a plurality of penetrating breathable holes and has the latitudinal elongation, the bidirectional elastic film is made of a thermoplastic elastomer material and also provided with a plurality of penetrating breathable holes and has the appropriate elongation in both the latitudinal direction and the meridional direction, and the upper surface of thebidirectional elastic film is fully or partially attached to the lower surface of the unidirectional elastic cloth. In particular, the breathability of the bidirectional elastic film is 17-25 cc / secper square centimeter, and the overall breathability of bidirectional elastic material is 7-10 cc / sec per square centimeter. The bidirectional elastic breathable material has the advantages of bidirectional extension and breathability, and is suitable for being applied to closed-fit clothes or diapers, the comfortable sensation is improved, and stuffiness and moist are avoided.

The present invention provides a hyperspectral resolution X-ray grazing incidence microscopic imaging system, which includes two grazing incidence curved surface X-ray optical devices named as the first optical device and the second optical device respectively, the first optical device and the second optical device The optical axis of the second optical device is orthogonal, the X-ray emitted by the object point is reflected by the first optical device, and focused in the meridional direction to form a quasi-monochromatic one-dimensional image, and then realized in the sagittal direction by the second optical device The light is split and focused to form a highly monochromatic two-dimensional image, which is finally imaged on a recording medium. The hyperspectral resolution X-ray grazing incidence microscopic imaging system of the present invention has the characteristics of high spatial resolution, good energy resolution and small aberration, and well overcomes the shortcomings of traditional X-ray microscopes.

Provided is an imaging optical system which comprises, sequentially from the object side to the image surface side, a first lens having a positive power, a second lens which is a meniscus lens having a convex surface on the image side, a third lens having a positive power, and a fourth lens having a negative power. The power of the third lens in the vicinity of the principal ray in the meridional direction is positive in the paraxial area, and is negative in an area distant from the optical axis. The power of the fourth lens in the vicinity of the principal ray in the meridional direction is negative in the paraxial area, and is positive in an area distant from the optical axis. The first lens is provided with diffraction gratings on the image side surface. If it is assumed that the focallength of the second lens is f2, the resultant focal length of the imaging optical system is fT, and the distance between the aperture stop or the apex of the object side surface of the first lens, whichever is closer to the object side, and the image surface is TTL, the following formulae are satisfied; |f 2 / f T | >= 3 (1) TTL / f T <= 1.2 (2).

Provided is an optical system with an excellent anti-reflection effect and ghost suppression effect including an aspherical lens having at least one of an incident surface and an exiting surface of an optical glass formed of an aspherical surface, in which: the aspherical surface includes an anti-reflection structure formed thereon, the anti-reflection structure having an anti-reflection function and including multiple inorganic structural parts finer than a used wavelength; and the aspherical surface has a point that satisfies the following expression: |(1 / Rm−1 / Rs) / Rm|>5.0×10−5, where Rm denotes a radius of curvature in a meridional direction at an arbitrary point, and Rs denotes a radius of curvature in a sagittal direction at the arbitrary point.

An optical device (100) is disclosed, comprising a collimator (110) and a first lenslet array (130, 430) and a second lenslet array (140, 440). The first lenslet array and the second lenslet array are provided with the same tessellation pattern, aligned with each other and arranged such that a projection (150) of a light source (122) is focused on the second lenslet array, which is configured to emit non-focused light. At least some of the lenslets of the second array are formed such that a ratio of their sagittal and meridional dimensions varies at least along the meridional direction (M) of the second lenslet array, based on the varying shape of the projection of the light source as seen by said lenslets, so as to achieve an improved mixing, intensity and uniformity of light emitted from the optical device.

The invention discloses a laser displacement sensor, which comprises a laser, an imaging objective lens and a photosensitive element, wherein the laser is used for injecting a laser beam; light received and injected by the imaging objective lens is incident to the photosensitive element; when modulation transfer function (MTF) analysis is carried out on the imaging objective lens and the photosensitive element, the analysis result meets the following conditions: in a condition in which the main arrangement direction of multiple photosensitive units of the photosensitive element is a sagittal direction, MTFS>MTFT; in a condition in which the main arrangement direction of multiple photosensitive units of the photosensitive element is a meridional direction, MTFT>MTFS; and the MTFS is the MTF value in the sagittal direction, and the MTFT is the MTF value in the meridional direction. The objective lens design difficulty can be reduced, the manufacturing cost and the maintenance cost are saved, the measurement accuracy is improved, and bad influences caused by vibration or mechanical deformation in the case of use can be better handled.