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21. 发明专利

JPH10162413A OPTICAL HEAD DEVICE 失效
公开(公告)号：JPH10162413A
公开(公告)日：1998-06-19
申请号：JP31594696
申请日：1996-11-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI
IPC分类号： G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To make an optical head device small in size and light in weight and to make the thickness in an optical axis of the device remarkably thin by providing a semiconductor laser and a photodetector which are designed in a module and constituting the optical head device capable of separating a return light from a recording surface to the photodetector. SOLUTION: A first reflection surface 22A is formed into an off-elliptic surface shape becoming a convex shape with respect to an incident luminous flux and is arranged roughly on the optical axis of a dielectric member 28A with respect to an optical disk 25 to that the extension direction of the surface is inclined at almost 45 degrees to the optical axis of the exit luminous flux of a semiconductor laser 21A. When the exit luminous flux of the semiconductor laser 21A is made incident on the first reflection surface 22A, it is totally reflected so as to be bent almost at right angles toward the direction of the optical disk to reach a second reflection surface 23A. The second reflection surface 23A is a tatal reflection aspherical surface being on an incident luminous flux axis which becomes a concave shape with respect to the incident luminous flux and achieves the function of an objective lens by acting so as to reflect the incident luminous flux to a roughly opposite direction, that is, to the optical disk 25 direction side and also to converge it on a recording surface 26.

22. 发明专利

JPH10154343A OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH10154343A
公开(公告)日：1998-06-09
申请号：JP31031596
申请日：1996-11-21
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI
IPC分类号： G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To keep the optical distance in the focusing direction, etc., constant by making a lens formed into spherical or columnar shape with a transparent material and condensing luminous flux emitted from a light source on the recording surface of an optical recording medium rotatable while being in contact with the surface of the optical recording medium. SOLUTION: The spherical lens 26 and guide rollers 30 are rotatably constituted around a center of the sphere to hold the optical recording medium 27 between them keeping the contact therewith and also constituted movable in the left/right direction. The luminous flux emitted from a light emitting diode 23 is reflected in almost perpendicular direction on the reflection surface 24 being a luminous flux separating means, and entered to the spherical lens 26 transmitting through a circular aperture diaphragm 25 then converged on the recording surface 28 of the optical recording medium 27 as a very small spot. At this time, the optical distances such as the focusing distance, etc., to the optical recording medium 27 are always kept constant.

23. 发明专利

JPH1094534A APPARATUS FOR IDENTIFYING INDIVIDUAL 失效
公开(公告)号：JPH1094534A
公开(公告)日：1998-04-14
申请号：JP25108296
申请日：1996-09-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI
IPC分类号： A61B5/117
摘要： PROBLEM TO BE SOLVED: To obtain excellent reliability on accuracy and result of identification by irradiating an auricle with light and measuring its reflected light. SOLUTION: An auricle mounting part 3 of a head part 1 is closely brought to the whole auricle 12 of an objective for discrimination so as to cover it and positioning is performed by inserting the first fixing part 6 into an external acoustic pore 13. In addition, the second fixing part 7 is brought into light contact with a helix. Under this condition, light emitting parts 4 arranged on each position L1-L4 in the auricle mounting part 3 are successively emitted at a definite interval and for a definite emitting time by a light emitting part driving means. The irradiating light produces irregular reflection in accordance with the shape on the surface of the auricle 12 and is received by a light receiving part 5 arranged in the auricle mounting part 3. After the incident light is photoelectrically converted, it is processed as a time-sequential signal pattern on every light receiving part 5 in a signal processing part 8. Thereafter, a signal pattern outputted from the signal processing part 8 is compared with the signal patterns registered in a registration part 9 in advance and is judged in a comparing and judging part 10.

24. 发明专利

JPH09330529A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JPH09330529A
公开(公告)日：1997-12-22
申请号：JP14538796
申请日：1996-06-07
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI
IPC分类号： G11B7/135 , G11B7/20
摘要： PROBLEM TO BE SOLVED: To record and reproduce two kinds of optical disks having the different substrate thicknesses with one optical pickup device. SOLUTION: A plate 21 comprising the derivative of a parallel flat plates is moved in the optical path of the gap between an objective lesn 20 and an optical recording medium, so that the plate is made to advance and retreat freely. When the plate 21 advances in the optical path by this movement, the abberation of the optical spot condensed on a recording surface 23 is corrected. When the plate 21 is made to retreat from the inside of the optical path by the above described movement, the abberanion of the optical spot condensed on the recording surface is made to remain. Thus, the reading or writing operation can be performed for any of the optical recording media having the different thicknesses by the single optical pickup device.

25. 发明专利

JPH09299355A INDIVIDUAL RECOGNITION SYSTEM 失效
公开(公告)号：JPH09299355A
公开(公告)日：1997-11-25
申请号：JP12128596
申请日：1996-05-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI
IPC分类号： A61B5/117
摘要： PROBLEM TO BE SOLVED: To provide a small and lightweight individual recognition system which can be operated stably at high recognition rate. SOLUTION: A light beam of a laser 15 is applied to a finger end 23. The Doppler effect of the returning light beam caused by the movement of the finger end 23 causes a change in the frequency of the reflected light according to the speed of oscillation. When the reflected light and reference light reflected by a first beam splitter 16 are superimposed on the same plane on a photodetector 26, interference is caused and the frequency difference between the two beams arises as a beat frequency. By determining the relation between its frequency characteristic and a photodetector output by means of a frequency analyzer 29, a response pattern that is characteristic of an individual can be obtained, and is compared with data in a register 31 by a comparator 30, whereby individual recognition can be achieved to see whether or not a reference person is the aimed one.

26. 发明专利

JPH09128781A OPTICAL HEAD DEVICE 失效
公开(公告)号：JPH09128781A
公开(公告)日：1997-05-16
申请号：JP28035695
申请日：1995-10-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI
IPC分类号： G11B7/09 , G11B7/125 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide a small-sized and light weighted optical head device excellent in an equipment assembling property and a stable driving property. SOLUTION: This device is an optical head device constituted so as to set up a semiconductor laser 21 being a light source in the inside of an objective lens 22, and luminous flux outgoing from the semiconductor laser 21 in the objective lens 22 is made incident on the objective lens 22 again by a reflection mirror 23 set at the bottom part, and the luminous flux is converged on a recording surface 24. Further, reflection return light from the recording surface 24 is separated to a photodetector 25 by a hologram element 26 set at the bottom part of the objective lens 22 or the reflection mirror 23.

27. 发明专利

JPH08338936A OPTICAL HEAD DEVICE 失效
公开(公告)号：JPH08338936A
公开(公告)日：1996-12-24
申请号：JP14600495
申请日：1995-06-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI , KOJIMA KOKI
IPC分类号： G02B7/04 , G11B7/09 , G11B7/135
摘要： PURPOSE: To provide an optical head device stable and fast in operation performance and capable of being made compact and light in weight. CONSTITUTION: An objective lens 29 is freely moved in the focusing direction thereof and the movement thereof within a surface including a tracking direction and being parallel with a disk surface is restricted by a wire 33 inserted in a through-hole which is coaxial with an optical axis and whose diameter is very small. Therefore, the lens 29 is not deflected or inclined. Besides, a focusing control action or a tracking control action can be executed without widening the thickness of the optical head device.

28. 发明专利

JPH08286014A OBJECTIVE LENS OF OPTICAL PICKUP 失效
公开(公告)号：JPH08286014A
公开(公告)日：1996-11-01
申请号：JP8931495
申请日：1995-04-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI , KOJIMA KOKI
IPC分类号： G02B5/18 , G02B3/08 , G02B5/32
摘要： PURPOSE: To provide the objective lens of an optical pickup performing optical signal output where light condensing performance is high and which is stable by correcting astigmatic component incoporated in outgoing light from a semiconductor laser. CONSTITUTION: An astigmatic correcting means 19 correcting the astigmatic component which the objective lens 13 has is provided at the incident surface 18 of the objective lens 13 from the semiconductor laser 11. The astigmatic correcting means 19 is constituted of a nearly cylindrical surface that has a bus in the minor axis direction N of the incident ellipitic luminous flux 20 of the semiconductor laser 11. Also, it is realized by a hologram and a distribution refractive index plate.

29. 发明专利

JPH06124469A OPTICAL HEAD 失效
公开(公告)号：JPH06124469A
公开(公告)日：1994-05-06
申请号：JP27444092
申请日：1992-10-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HIGO KAZUHIKO , KIYOMATSU SATOSHI , KONO HARUHIKO
IPC分类号： G11B7/09 , G11B7/135
摘要： PURPOSE:To obtain an optical head wherein it complies with a high-speed access operation, its cost is low, its operation is especially stable and its reliability is high. CONSTITUTION:A fine tracking operation is executed by a galvanomirror 3, a reflection-type diffraction grating is executed to the galvanomirror, and a beam of returned light is separated. Thereby, a beam of regular reflected light is incident on an object lens 5, and beams of + or - primary diffracted light 13, 14 and a beam of high-order diffracted light which have a bad influence of an optical system as other beams of stray light and which are generated on the side of a return route are removed.

30. 发明专利

JPH0689477A OPTICAL HEAD DEVICE 失效
公开(公告)号：JPH0689477A
公开(公告)日：1994-03-29
申请号：JP24054492
申请日：1992-09-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIYOMATSU SATOSHI , KONO HARUHIKO , HIGO KAZUHIKO
IPC分类号： G11B7/09 , G11B7/135 , G11B11/10 , G11B11/105
摘要： PURPOSE:To miniaturize and simplify an optical system and also to obtain a magneto-optical regenerative signal of high quality by providing a photodetector, a parallel light conversion means and a deflection angle detecting means optically at a rear stage of a semiconductor laser in relation to an objective lens. CONSTITUTION:The photodetector 8, the parallel light conversion means for collimating condensing reflected light as a conversion lens 9, a light receiving element 11 as the deflection angle detecting means for detecting a deflection angle of each component of the parallel light and a photosensor 12 are provided optically at the rear stage of the semiconductor laser 1 in relation to the objective lens 5. Thus, by the light receiving element 11 and the photosensor 12, a magneto-optical signal from a recorded surface 6 can be reproduced with high quality, and in addition, a beam splitter and a condenser lens can be omitted.

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