1. A method for making a fibrous layer, comprising:
refining cellulosic fibers to provide refined fibers, wherein the cellulosic fibers comprise crosslinked cellulosic fibers;
combining the refined fibers with a dispersion medium to provide a fibrous slurry;
depositing the fibrous slurry on a foraminous support to provide a wet composite;
introducing an adsorbent material into said wet composite at a plurality of points, said absorbent material having an absorbent capacity greater than the refined cellulosic fibers; and
drying the wet composite to provide a fibrous layer.
2. The method of claim 1, wherein the cellulosic fibers comprise a blend of crosslinked cellulosic fibers and noncrosslinked cellulosic fibers.
3. The method of claim 2, wherein the noncrosslinked fibers are at least one of softwood fibers or hardwood fibers.
4. The method of claim 2, wherein the noncrosslinked fibers comprise southern pine fibers.
5. The method of claim 1, wherein the cellulosic fibers comprise a blend of crosslinked cellulosic fibers and southern pine fibers.
6. The method of claim 1, wherein the cellulosic fibers comprise a refined blend of said crosslinked cellulosic fibers and southern pine fibers.
7. The method of claim 1, wherein the cellulosic fibers comprise a blend of crosslinked cellulosic fibers and refined southern pine fibers.
8. The method of claim 1, wherein the cellulosic fibers comprise a refined blend of crosslinked cellulosic fibers and refined southern pine fibers.
9. The method of claim 1, wherein the method is carried out on at least one of a Fourdrinier or a twin-wire papermaking machine.
10. The method of claim 1, wherein the method is at least one of a wetlaid method and a foam-forming method.
11. A method for making a fibrous layer, comprising:
refining cellulosic fibers to provide refined fibers, wherein the cellulosic fibers comprise
combining the refined fibers with a dispersion medium to provide a fibrous slurry;
moving a first foraminous element in a first path;
moving a second foraminous element in a second path;
passing a first portion of the fibrous slurry into contact with the first foraminous element;
passing a second portion of the fibrous slurry into contact with the second foraminous element;
forming a fibrous web from the slurry by withdrawing liquid from the slurry through the first and second foraminous elements;
introducing and absorbent material into said fibrous web at a plurality of points, said absorbent material having an absorbant capacity greater than the refined cellulosic fibers; and
drying the web provide a fibrous layer.
12. The method of claim 11, wherein the cellulosic fibers comprise a blend of crosslinked cellulosic fibers and noncrosslinked cellulosic fibers.
13. The method of claim 12, wherein the noncrosslinked fibers are at least one of softwood fibers or hardwood fibers.
14. The method of claim 12, wherein the noncrosslinked fibers comprise southern pine fibers.
15. The method of claim 11, wherein the cellulosic fibers comprise a blend of crosslinked cellulosic fibers and southern pine fibers.
16. The method of claim 11, wherein the cellulosic fibers comprise a refined blend of said crosslinked cellulosic fibers and southern pine fibers.
17. The method of claim 11, wherein the cellulosic fibers comprise a blend of crosslinked cellulosic fibers and refined southern pine fibers.
18. The method of claim 11, wherein the cellulosic fibers comprise a refined blend of crosslinked cellulosic fibers and refined southern pine fibers.
19. The method of claim 11, wherein the method is at least one of a wetlaid method or a foam-forming method.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An optical head, comprising:
a transparent condensing medium which has a condensed surface and condenses the laser beam to form a beam spot on the condensed surface;
a shade provided on the transparent condensing medium and having an aperture at a position where the beam spot is formed, the area of the aperture being smaller than the size of the beam spot; and
a micro metal member at least part of which is positioned in the aperture.
2. The optical head according to claim 1, wherein the shape of the aperture is round or rectangular.
3. The optical head according to claim 1, wherein the shape of the micro metal member is round or rectangular.
4. The optical head according to claim 1, wherein the micro metal member is thinner than the thickness of the shade.
5. The optical head according to claim 1, wherein the shade has an tilted surface, in an edge of the aperture, which reflects the laser beam forming the light spot toward the aperture.
6. The optical head according to claim 1, wherein the transparent condensing medium has a convex part in a periphery of the micro metal member, and the convex part has an tilted surface that reflects toward the aperture the laser beam forming the light spot.
7. The optical head according to claim 1, wherein bottom surfaces of the shade and the micro metal member are flat with a surrounding surface of the transparent condensing medium.
8. The optical head according to claim 1, wherein the micro metal member is protruded from the light-condensed surface of the transparent condensing medium.
9. The optical head according to claim 1, wherein the optical head comprises a plurality of the micro metal members, and at least a pair of the micro metal members face each other with a gap positioned in the aperture therebetween.
10. The optical head according to claim 1, wherein the shade is made of metal and the micro metal member is connected to the shade.
11. An optical head, comprising:
a transparent condensing medium which has a condensed surface and condenses the laser beam to form a beam spot on the condensed surface;
a shade provided on the transparent condensing medium and having an aperture at a position where the beam spot is formed, the area of the aperture being smaller than the size of the beam spot; and
a micro metal member at least a part of which is positioned in the aperture, wherein the metal shade and the micro metal member have the thickness of one-half or larger of a wavelength of the laser beam in the transparent condensing medium.
12. The optical head according to claim 11, wherein the transparent condensing medium surrounds a periphery of the micro metal member, and provides a convex part positioned in the aperture.
13. The optical head according to claim 11, wherein the metal shade has an tilted surface in an edge of the aperture, and the tilted surface reflects the laser beam forming the light spot toward the micro metal member.
14. The optical head according to claim 11, wherein the micro metal member has an tilted surface in its periphery, and the tilted surface reflects the laser beam forming the light spot toward the aperture.
15. The optical head according to claim 11, wherein the metal shade and the micro metal member constitute one of mirrors of an optical resonator of a laser emitting the laser beam forming the light spot.
16. A magneto-optical head comprising:
a transparent condensing medium which has a condensed surface and condenses the laser beam to form a beam spot on the condensed surface;
a shade provided on the transparent condensing medium and having an aperture at a position where the beam spot is formed, the area of the aperture being smaller than the size of the beam spot; and
a micro metal member at least a part of which is positioned in the aperture; and
a magneto-resistive sensor having a detecting part on a plane being flat with a bottom surface of the micro metal member.
17. The magneto-optical head according to claim 16,
wherein the shade comprises a metal film,
the shade and the micro metal member have the thickness of one-half or larger of a wavelength of the laser beam in the transparent condensing medium, and
the micro metal member has the size lager than the light spot.
18. A disk apparatus comprising:
a disk having a recording medium formed on its surface;
a laser emitting a laser beam;
an optical system having a transparent condensing medium which has a condensed surface and condenses the laser beam to form a beam spot on the condensed surface;
a shade provided on the transparent condensing medium and having an aperture at a position where the beam spot is formed, the area of the aperture being smaller than the size of the beam spot;
a micro metal member at least part of which is positioned in the aperture; and
a shifting mechanism that shifts a light emitted from the aperture relative to the recording medium.
19. A disk apparatus, comprising:
a disk having a recording medium formed on its surface;
a laser emitting a laser beam;
an optical system having a transparent condensing medium which has a condensed surface and condenses the laser beam to form a beam spot on the condensed surface;
a shade provided on the transparent condensing medium and having an aperture at a position where the beam spot is formed, the area of the aperture being smaller than the size of the beam spot; and
a micro metal member at least part of which is positioned in the aperture; and
a shifting mechanism that shifts a light emitted from the aperture relative to the recording medium,
wherein the metal shade and the micro metal member have the thickness of one-half or larger of a wavelength of the laser beam in the transparent condensing medium.
20. The disk apparatus according to claim 19,
wherein the micro metal member has a narrow shape such as rectangular or elliptical, and
the shifting mechanism performs tracking of the emitting-light from the aperture to a direction which is orthogonal to the major axis of the micro metal member.
21. The disk apparatus according to claim 19,
wherein the transparent condensing medium is scanned in a direction orthogonal to a track by piezoelectric elements provided in both sides of the transparent condensing medium for tracking the emitting-light from the aperture.
22. A manufacturing method of an optical head, comprising the steps of:
preparing a transparent condensing medium having a light-condensed surface where a light spot is formed by an incident laser beam;
covering with photoresist a doughnut-shaped area having a size smaller than that of the light spot in a bottom surface of the transparent condensing medium;
forming a concave part whose bottom surface is the light-condensed surface by removing an area, where the photoresist is not present, on the bottom surface of the transparent condensing medium in a predetermined depth which is equal to or smaller than a wavelength of the laser beam by etching; and
forming a metal body having the doughnut-shaped aperture by depositing a metal material in the concave part.
23. The manufacturing method of an optical head according to claim 22, further comprising the step of forming a micro metal member by depositing a metal material in a central part of the aperture of the metal body by a focused ion beam method.