Abstract: The invention relates to a manufacturing method of a die for molding an optical element. The manufacturing method comprising: forming the first film layer of an amorphous alloy having a super-cooling liquid phase onto a master transfer surface of a master die for molding a molding transfer surface of the die; heating the first film layer more than a glass transition point of the amorphous alloy having the super-cooling liquid phase while a surface of the first film layer and a transferred surface of a base material of the die being faced and pressed; and peeling the first film layer from the master die and transferring the first film layer onto the base material of the die to form the molding transfer surface of the die.

Abstract: The tensile strength of the first fixing member is larger than the tensile strength of the second fixing member. When the attaching and detaching of the cutting tool is repeated, although the second fixing member having a smaller tensile strength gets deteriorated, it is sufficient to replace the second fixing member, and it is possible to prevent breakage of the first fixing member, and it is possible to reduce the frequency of replacing the vibration body. As the material for first fixing member, it is possible to use high-speed steel, cemented carbide, SCM steel (chrome molybdenum steel), etc. As the material for the second fixing member, it is possible to use cemented carbide, SCM steel, etc.

Abstract: A molding die for molding an optical element, comprises a die base body formed by shaping an amorphous alloy having a super-cooled liquid phase, and a die face formed by applying a die face forming process onto a part of the die base body and used to form an optical surface of the optical element or a dimensional reference surface.

Abstract: An objective is to provide a film formation method with which a layer having reduced defects, a die obtained by the film formation method, and a method of manufacturing the die. Free carbons increase in the case of reducing hydrogen gas as a carrier gas, so that concave portions are generated and increased during the molding transfer surface process. It was commonly known that hydrogen gas employed for the thermal CVD was set to 2 moles, but it was found out that generation of concave portions was possible to be largely inhibited by setting hydrogen gas to at least 3 moles. However, a level of up to 8 moles is preferable in view of practical use, since dilution of the total raw material gas causes a decline of reaction speed in the case of too much increase of hydrogen gas, resulting in the low speed of film formation.

Abstract: A machining apparatus for conducting at least one of a cutting process and a grinding process, comprises a stationary base; and a working device mounted on the stationary base and having a degree of freedom of more than two axes to conduct at least one of a cutting process and a grinding process, the working device comprising a first working bench which is formed of a ceramic material and is movable linearly with a degree of freedom of not less than one axes or more while holding a work piece or a tool.

Abstract: In the assembly of vibration body, the first width in the lateral direction (X axis direction) is greater than the second width in the longitudinal direction (Y axis direction) in the cross sectional form perpendicular to Z axis of the first portion on the tip side from the closest node position, thereby, the rigidity of a vibration body main part in the X axis direction can be enhanced, and lateral bending vibrations on fixing portion can be restrained. Consequently, an object can be processed highly accurately by the assembly of vibration body that is controlled with a high precision.

Abstract: In a vibration cutting unit, a root portion of a holding member for supporting a vibration body is fixed on a fixed portion of a node portion which is common to axial vibration and bending vibration, on a jointless basis. Therefore, the node portion, namely, a vibration body main part is firmly fixed, thereby, the vibration body main part is supported stably, and vibrations of the vibration body main part is stabilized. In other words, vibrations under the mode where the vibration body main part cannot be controlled can be restrained, and works representing objects to be processed can be processed accurately.

Abstract: A load conveyance device composed of: a load supporting device having a through hole passing in a gravity direction, and a fluid supplying device to supply a fluid into the through hole, wherein when load is dropped into the through hole from a top of the through hole, the load is supported under a floating condition by a force of the fluid in the through hole, and when the load is not supported by change of the force of the fluid, the load is dropped from a lower end of the through hole to an outside.

Abstract: A conveyance apparatus comprises a transformer having a core, a primary coil connected to an alternate power source and a secondary coil connected to an output coil, a holding section including a conductive member for heating fluid by high frequency induction heating based on magnetic field generated by the output coil, the holding section for supplying fluid heated by the conductive member and for holding a heating object by the fluid, wherein, the secondary coil is capable of relatively moving to or relatively swinging on the core while the holding section moves.

Abstract: An optical pickup device for recording and/or reproducing information in an optical information recording medium, comprises a light source to emit light flux having a central wavelength not longer than 500 nm; a converging optical system to converge the light flux emitted from the light source onto an information recording surface of the optical information recording medium; and an optical detector to detect light flux reflected from the information recording surface of the optical information recording medium or the light flux passing through the information recording surface of the optical information recording medium; wherein the converging optical system or the optical detector comprises at least one optical element and the optical element comprises at least one optical surface having a center-line mean roughness Ra of 5 nm or less.

Abstract: A processing apparatus is provided with a diamond tool. When a first edge portion is made as X axis, a tip end peak point of a rake face is made as an intercept (0, y) on Y axis, and the rake face is projected in the first quadrant on an X-Y plane, a shape between an end portion of a first edge portion and an end portion of a second edge portion is asymmetric around a straight line which passes at the intercept and is parallel to X axis and the shape is shaped to be not a straight line such that Y value of a point on the shape increases as X value of the point increases.

Abstract: A static pressure sliding block which can exhibit a stable function for a long time while flow control member 23 is pressed onto recess surface 21b of static pressure receiving surface 21a for fixing it onto main body 21 formed of a brittle material by employing elastic deformation of connecting member 22 so that damage of main body 21 can be avoided because flow control member 23 is fixed without screw holes and only by applying compression stress.

Abstract: A machining apparatus for conducting at least one of a cutting process and a grinding process, comprises a stationary base; and a working device mounted on the stationary base and having a degree of freedom of more than two axes to conduct at least one of a cutting process and a grinding process, the working device comprising a first working bench which is formed of a ceramic material and is movable linearly with a degree of freedom of not less than one axes or more while holding a work piece or a tool.

Abstract: A method of adjusting a forming die unit held by a die holding member, comprising steps of discharging a pressure transmitting medium from at least one of the forming die unit and the die holding member to the other one so as to apply a power in a direction that the forming die unit is spaced away from the die holding member; and displacing the forming die unit relatively to the die holding member.

Abstract: A built-in motor type spindle device comprising a housing and a spindle, wherein said spindle device further includes static pressure bearings which support the spindle so that the spindle can rotate freely relatively to the housing, two lines of magnetic field generating members which are provided on the spindle, and two pairs of coils which are provided on the housing and respectively face the magnetic field generating members and since the spindle device circumferentially disperses the which magnetic field generating members generate heat, the spindle device can prevent the spindle from being hot locally and further, since the surface area of the magnetic field generating members on the spindle are made larger, they can be cooled more effectively than one line of magnetic field generating members.

Abstract: A molding die for an optical element, comprises a die base body formed by shaping an amorphous alloy having a super-cooled liquid phase, and a die face formed by applying a die face forming process onto a part of the die base body and used to form an optical surface of the optical element or a dimensional reference surface.

Abstract: A spindle device to mount and rotate an object, including: a housing; a main shaft supported by the housing rotatably to the housing wherein the main shaft includes a through hole which goes through from an end to the other end thereof, and an opening of the through hole forms a mounting section to mount the object at the end, and an opening of the through hole forms a suction section at the other end; a connecter member disposed to cover-the outside of the other end and connected with the external negative-pressure source; and a bearing disposed between the circumference of the main shaft at other end and the connecter member covering the outside; wherein the object is suctioned onto the mounting section at the end with the external negative-pressure source through the through hole.

Abstract: A machining method of machining a transfer optical surface on a optical element producing die having the transfer optical surface made of a material having Vickers hardness of Hv1500 or more, comprising: machining the transfer optical surface on the optical element producing die by cutting with a cutting tool, wherein a rake face of a tip of a blade of the cutting tool is set with an angle of minus values at an incising point on a surface to be machined.

Abstract: An optical element for recording and/or reproducing information of an optical information recording medium, includes an optical element body having an incident surface and an opposite surface opposite to the incident surface, A light flux coming from a light source at an outside is introduced to be incident into an inside of the optical element body and is reflected several times in the inside of the optical element body so that the light flux is converged on the opposite surface; and the incident surface is a refractive surface, is convex toward the light source side and includes an optical axis.

Abstract: A static pressure sliding block which can exhibit a stable function for a long time while flow control member 23 is pressed onto recess surface 21b of static pressure receiving surface 21a for fixing it onto main body 21 formed of a brittle material by employing elastic deformation of connecting member 22 so that damage of main body 21 can be avoided because flow control member 23 is fixed without screw holes and only by applying compression stress.