Abstract: An actuator whose total length can be reduced is provided. An actuator (2) includes: a casing (7); a hollow shaft (8) rotatably supported by the casing (7) via a bearing (9a, 9b), the hollow shaft (8) including a bottom portion (8b); a screw shaft (14) coupled to the bottom portion (8b) of the hollow shaft (8), the screw shaft (14) sharing a common center line with the hollow shaft (8); and a nut (15) threadedly connected to the screw shaft (14). The nut (15) is capable of moving in an axial direction of the screw shaft (14) to enter between the hollow shaft (8) and the screw shaft (14).

Abstract: In the cell culture device, a volume of a space defined by a diaphragm of the diaphragm pump and a plane at an outer edge of the diaphragm is 1 cm3 or more and 20 cm3 or less, in a case where an angle formed by a straight line connecting a foot of a perpendicular line from the apex to the plane to each point in the diaphragm and by the perpendicular line is denoted by an angle A, a thickness H of the diaphragm is within a range of 0.5 mm or more and 1.5 mm or less where the angle A is from 0° to 75°, and in a case where a thickness of the diaphragm at the apex is denoted by HT, the thickness H satisfies a relationship of 1?HT/H?1.75 at any point where the angle A is from 0° to 75°.

Abstract: A transparent electromagnetic wave-shielding filter, containing a support, a conductive layer provided on the support, and a hard coat layer provided on the conductive layer, wherein the conductive layer is formed by subjecting an emulsion layer which contains a silver halide and a binder and is coated on the support, to exposure and developing process, wherein the hard coat layer is formed by coating a coating liquid for forming the hard coat layer with a solvent on the conductive layer, and wherein the emulsion layer contains a compound soluble in the solvent of the coating liquid for forming the hard coat layer.

Abstract: A conductive film producing method includes a metallic silver forming step of exposing and developing a photosensitive material having a 95-?m-thick long support and thereon a silver salt-containing emulsion layer, thereby forming a metallic silver portion to prepare a conductive film precursor, and a smoothing treatment step of subjecting the conductive film precursor to a smoothing treatment to produce a conductive film. In the smoothing treatment, the conductive film precursor is pressed by first and second calender rolls facing each other, and the first calender roll is a resin roll to be brought into contact with the support. The method satisfies the condition of 1/2?P1/P2?1, wherein P1 represents a conveying force applied when the conductive film precursor is introduced to an area where the smoothing treatment step is conducted, and P2 represents a conveying force applied when the smoothing-treated conductive film is discharged from the area.

Abstract: A transparent electromagnetic wave-shielding filter, containing a support, a conductive layer provided on the support, and a hard coat layer provided on the conductive layer, wherein the conductive layer is formed by subjecting an emulsion layer which contains a silver halide and a binder and is coated on the support, to exposure and developing process, wherein the hard coat layer is formed by coating a coating liquid for forming the hard coat layer with a solvent on the conductive layer, and wherein the emulsion layer contains a compound soluble in the solvent of the coating liquid for forming the hard coat layer.

Abstract: A conductive film producing method includes a metallic silver forming step of exposing and developing a photosensitive material having a 95-?m-thick long support and thereon a silver salt-containing emulsion layer, thereby forming a metallic silver portion to prepare a conductive film precursor, and a smoothing treatment step of subjecting the conductive film precursor to a smoothing treatment to produce a conductive film. In the smoothing treatment, the conductive film precursor is pressed by first and second calender rolls facing each other, and the first calender roll is a resin roll to be brought into contact with the support. The method satisfies the condition of ½?P1/P2?1, wherein P1 represents a conveying force applied when the conductive film precursor is introduced to an area where the smoothing treatment step is conducted, and P2 represents a conveying force applied when the smoothing-treated conductive film is discharged from the area.

Abstract: In a method of repairing at least one optical cable, in one repeating span between two adjacent repeaters, which is constituted by a first optical fiber exhibiting positive wavelength dispersion with respect to an optical signal to be transmitted and a second optical fiber which is connected in series with the first optical fiber and exhibits negative wavelength dispersion with respect to the optical signal, an optical cable portion, in the repeating span, which includes a fault point of at least an optical cable in one direction and has a fixed length from a point near one of two adjacent repeaters is cut. At least one repair cable piece constituted by a third optical fiber exhibiting the same positive wavelength dispersion as that of the first optical fiber and a fourth optical fiber which is connected in series with the third optical fiber and exhibits the same negative wavelength dispersion as that of the second optical fiber is inserted and connected in the cut optical cable portion.

Abstract: A remote amplifier of the present invention includes an optical splitter and an optical combiner respectively connected to an input and an output thereof. One end of the split output of the splitter is used as an input port while one end of the combiner is used as an output port. When a fault occurs at a certain point on an optical transmission path, an ODOR (Optical Time Domain Reflect meter) is connected to either one of the input port and output port for evaluating the faulty point.

Abstract: A submarine optical gain equalizer installed on a submarine optical transmission cable 5. The submarine optical gain equalizer comprises a pressure housing 1, in which an optical gain equalizer and n through-fibers are installed. Input and output ports of the optical gain equalizer and the through-fibers are formed in the outside of the pressure housing. The submarine optical gain equalizer equalizes levels of signal light having wavelengths different each other caused by optical fiber amplifiers. In general, one submarine optical gain equalizer is installed for 40 optical fiber amplifiers on a submarine optical cable.

Abstract: A submarine optical gain equalizer installed on a submarine optical transmission cable 5. The submarine optical gain equalizer comprises a pressure housing 1, in which an optical gain equalizer and n through-fibers are installed. Input and output ports of the optical gain equalizer and the through-fibers are formed in the outside of the pressure housing. The submarine optical gain equalizer equalizes levels of signal light having wavelengths different each other caused by optical fiber amplifiers. In general, one submarine optical gain equalizer is installed for 40 optical fiber amplifiers on a submarine optical cable.

Abstract: A submarine optical gain equalizer installed on a submarine optical transmission cable 5 comprises a pressure housing 1, in which an optical gain equalizer and n through-fibers are installed. Input and output ports of the optical gain equalizer and the through-fibers are formed in the outside of the pressure housing. The submarine optical gain equalizer equalizes levels of signal light having wavelengths different from each other caused by optical fiber amplifiers. In general, one submarine optical gain equalizer is installed for every 40 optical fiber amplifiers on a submarine optical cable.

Abstract: A solvent-soluble siloxane polyimide comprising a copolymer obtained by reaction of a diamine compound mixture comprising a diaminopolysiloxane, an alicyclic diamine and an aromatic diamine with an aromatic tetracarboxylic acid anhydride, followed by polyimidization reaction of the resulting polyamic acid forms a heat-resistant adhesive by adding an epoxy resin, a diamine-based curing agent and an organic solvent thereto, The formed adhesives provides a distinguished curling resistance without any warp when the resulting siloxane polyimide soluble in ordinary organic solvents is used as a main component of the adhesive for bonding between a base material and a copper foil of a flexible printed substrate.

Abstract: It is the object of the invention to provide a wavelength stability circuit used in a WDM optical transmission system, in which the spacing of wavelengths between adjacent optical signals are always so controlled as to keep a prescribed value. The two optical signals with different wavelengths are respectively generated by two laser diodes and multiplexed by an optical coupler. A portion of the multiplexed optical signals is supplied to an optical heterodyne detection circuit, where the spacing of the wavelengths between the two optical signals is detected. The spacing of the wavelengths between the optical signals is converted into an electrical signal by an O/E converter and a frequency counter, and the electrical signal is compared with a standard voltage in a comparator.

Abstract: A solvent-soluble siloxane polyimide comprising a copolymer obtained by reaction of a diamine compound mixture comprising a diaminopolysiloxane and an alicyclic diamine with an aromatic tetracarboxylic acid anhydride, followed by polyimidization reaction of the resulting polyamic acid forms a heat-resistant adhesive by adding an epoxy resin, a diamine-based curing agent and an organic solvent thereto, The formed adhesives show a distinguished heat-resistant adhesiveness when the resulting siloxane polyimide soluble in ordinary organic solvents is used as a main component of the adhesive for bonding between a base material and a copper foil of a flexible printed substrate. By further addition of a fluorinated resin to the heat-resistant adhesive, the adhesiveness can be more improved.

Abstract: A reproducing circuit is disclosed having a photo-diode for extracting a signal component of a monitor signal from an electric signal converted from an optical signal using a band pass filter 108 and an envelope detector circuit 111. The output of the photo-diode 106 is smoothed by a capacitor 12 via a buffer amplifier 11. A threshold voltage control circuit 13 converts the smoothed signal voltage with a predetermined ratio to produce a threshold voltage. A discriminator 115 converts the extracted monitor signal component into a binary signal using the threshold voltage as a reference. Since the smoothed voltage varies in accordance with the average intensity of optical signal, the monitor signal can be appropriately converted into a binary signal in accordance with the intensity of optical signal. Further, since the smoothing is performed by a capacitor, the circuit structure can be simplified.

Abstract: An optical modulating and amplifying apparatus includes an optical amplifier and a modulator. In the apparatus, an input optical signal and an excited light are combined with each other to produce an output light signal. The excited light from a laser diode is sensed by a photodiode. The sense signal includes a bias and an amplitude to be respectively detected by a mean value sensor and a modulation signal sensor. A modulation degree of the excited light is computed by a divider. A control signal to develop a predetermined modulation degree is delivered from a control signal generator to a variable gain amplifier. In response to the control signal, the amplifier controls the amplitude of the oscillation signal from an oscillator. A laser diode driver adds a bias to the oscillation signal to drive the laser diode. The modulation degree is kept unchanged regardless of variation in an output level of the excited light so as to achieve the modulation with a high signal-to-noise ratio.

Abstract: A spool valve has a valve housing with a valve bore formed therein, a spool having a land portion slidably accommodated in the valve bore, a control port formed within the valve housing, able to communicate with the valve bore, and opened and closed by the land portion, and an annular groove open at an inner peripheral surface of the valve bore and communicating with the control port. Part of the control port is open over the inner and outer parts, as taken in the widthwise direction, of the annular groove. The degree of opening of the port is variably controlled by the displacement of the land portion.

Abstract: An electromagnetic actuator includes a housing and a pair of stators cooperating with the housing to form a magnetic circuit for a solenoid. Each of the pair of stators has a tubular portion, and the tubular portions of the pair of stators have their one ends disposed in the opposed spaced relation to each other. The solenoid is mounted around the tubular portions of the pair of stators, and an armature is received in the tubular portions of the pair of stators so as to be movable along the axis of the tubular portions. The armature is supplied with a force when an electric current is applied to the solenoid. In order to keep the magnetic resistance of the magnetic circuit to a low level, one of the pair of stators is formed integrally with one end of a tubular body of the housing so that the housing and the one stator constitute a unitary member.