Abstract: An object of the present invention is to provide a method for manufacturing quantum dots capable of containing a large amount of Zn on a surface thereof, and a quantum dot. A method for manufacturing quantum dots of the present invention includes a step of producing a core containing at least Ag, Ga, and S or Ag, Ga, and Se, and a step of coating a surface of the core with a shell, and in the step of coating with the shell, the surface of the core is coated with GaS, and then Zn is added. It is preferable that the surface of the core is coated with ZnS after being coated with GaS. It is preferable that the core and the shell do not contain Cd and In.

Abstract: In a sphygmomanometer of the present invention, a cuff is attached to a rotating shaft on a rear surface side opposite to a front surface side arranged facing a subject during blood pressure measurement. A swing mechanism maintains a tilt angle of a central axis of the cuff with respect to a horizontal plane at a certain standby angle in a standby state of an upper arm not being inserted into the cuff, and also allows the tilt angle of the cuff to become either larger or smaller than the standby angle by the upper arm being inserted into the cuff.

Abstract: The present invention provides for example a reflecting mirror that has a reflecting surface that is capable or preventing the rise of the temperature of the electrodes due the reflection light.

Abstract: The present invention provides for example a reflecting mirror that has a reflecting surface that is capable or preventing the rise of the temperature of the electrodes due the reflection light.

Abstract: A discharge lamp of the present invention, which has an starting property, an arc stability and a service life which are improved even if the lamp produces a short arc. The discharge lamp includes a light emitting bulb, sealing members disposed on both sides of the light emitting bulb, metal foils sealed in the sealing members, a pair of electrodes which are connected to the metal foils and have large-diameter portions formed on tips, coils disposed at the rear of the large-diameter portions of the electrodes, external conductors, and a discharge medium enclosed in the light emitting bulb.

Abstract: When performing supply and measurement of various signals on n=8 semiconductor IC devices under test DUT1-DUT8 using m=3 substrates 10-30, reference voltages of the devices under test DUT1-DUT3 are input to the substrate 10, reference voltages of the devices under test DUT4-DUT6 are input to the substrate 20, and reference voltages of the devices under test DUT7 and 8 are input to the substrate 30. The reference voltages input to each substrate 10-30 are averaged. The mean voltages made in each substrate are further connected to each other, and a reference voltage is made using three substrates 10-30. The reference voltage is used as a reference voltage for voltage generating circuits 11-31. The reference voltage having no variation among each substrate is set even if the number of semiconductor IC devices under test is increased and the whole equipment becomes large.

Abstract: A discharge lamp of the present invention, which has an starting property, an arc stability and a service life which are improved even if the lamp produces a short arc. The discharge lamp includes a light emitting bulb, sealing members disposed on both sides of the light emitting bulb, metal foils sealed in the sealing members, a pair of electrodes which are connected to the metal foils and have large-diameter portions formed on tips, coils disposed at the rear of the large-diameter portions of the electrodes, external conductors, and a discharge medium enclosed in the light emitting bulb.

Abstract: A discharge lamp of the present invention, which has an starting property, an arc stability and a service life which are improved even if the lamp produces a short arc. The discharge lamp includes a light emitting bulb, sealing members disposed on both sides of the light emitting bulb, metal foils sealed in the sealing members, a pair of electrodes which are connected to the metal foils and have large-diameter portions formed on tips, coils disposed at the rear of the large-diameter portions of the electrodes, external conductors, and a discharge medium enclosed in the light emitting bulb.

Abstract: An image projector has a lamp unit 23 having a high-pressure mercury vapor discharge lamp 21 and a parabolic mirror 22. To the high-pressure mercury vapor discharge lamp 21, a driving system 24 applies an alternating voltage such that wandering of a cathode luminescent spot generated in the vicinity of a tip of each of the discharge electrodes of the high-pressure mercury vapor discharge lamp 21 is suppressed, the frequency being within the range of 20-42 kHz. This construction allows to prevent flicker in a projected image of a liquid crystal projector and the like, and therefore achieves high quality in the projected image.

Abstract: An image projector has a lamp unit 23 having a high-pressure mercury vapor discharge lamp 21 and a parabolic mirror 22. To the high-pressure mercury vapor discharge lamp 21, a driving system 24 applies an alternating voltage such that wandering of a cathode luminescent spot generated in the vicinity of a tip of each of the discharge electrodes of the high-pressure mercury vapor discharge lamp 21 is suppressed, the frequency being within the range of 20-42 kHz. This construction allows to prevent flicker in a projected image of a liquid crystal projector and the like, and therefore achieves high quality in the projected image.

Abstract: A thin cartridge to which a connector of the present invention is applied has an insertion space therein which is open through an opening formed on an end face of a frame thereof. A printed circuit board having terminals patterned on an edge surface portion thereof is provided on one of surfaces defining the insertion space. The connector includes an engagement wall to be inserted into the frame as a single component for engagement with the frame of the cartridge. The engagement wall has first and second opposite faces exposed to the outside. Arrangement of contact members retained in retention grooves formed in the first face can be viewed from the side opposed to the first face.

Abstract: A tin-lead alloy solder is provided which exhibits high joint strength under conditions which are likely to induce fatigue fracture. The tin-lead alloy solder comprises 15-80 wt. % lead, 0.1-5 wt. % silver, 0.1-10 wt. % antimony, and 0.0005-0.3 phosphorus, the balance being tin.

Abstract: A pyro-electric type infrared-ray sensor comprises a pyro-electric thin film such as Pb TiO.sub.3, an upper electrode of Al film formed on the upper surface of the pyro-electric thin film, a lower electrode thin film of Al formed on the bottom surface thereof and an organic thin film which covers the upper surface, and the sensor further comprises an infrared light reflection member, at least partially on the surface of the organic thin film.

Abstract: Discloses an aluminium brazing paste which not only has excellent preservability and coating performance but also reveals excellent brazing characteristics; said aluminium brazing paste according to this invention comprises, per 100 parts by weight of aluminum-containing metal powder with 10 to 500 .mu.m of mean particle size for aluminium brazing, of 0.5 to 15 parts by weight of flux and 30 to 80 parts by weight of a liquid polyisobutylene with 300 to 1500 of average molecular weight and/or its hydrogenated product.

Abstract: An anti-reflection film to be used for a plastic optical component is excellent in adhesion, durability and optical characteristic as well as be suited for mass-production. The anti-reflection film is a three-layered structure comprising, from the surface of the optical component on which it is formed, a first layer and a second layer which are made of a same dielectric material and a third layer which is a different dielectric material therefrom. Oxygen is introduced when the first layer is formed in order to provide the first layer smaller in refractive index than the second layer. The first and second layers are each made of any of cerium oxide, tantalum pentoxide and hafnium oxide and the third layer is made of silicon dioxide.

Abstract: An improved polarizer employing thin films is provided having higher optical properties and capable of fabricating in the mass production and reducing in the overall size or thickness. Particularly, a layer of optical element for polarizing separation of light extends over an undulated surface of a substrate having a cross section of either trapezoid-waveform or triangle-waveform oriented in a particular direction. The substrate having a trapezoid-waveform surface incorporates layers of optical element for reflection or absorption of light which are provided on the upper- and lower-base regions, excluding the sloping regions, of the trapezoid-waveform surface. On the other hand, the substrate having a triangle-waveform surface incorporates layers of optical element for absorption of light which are provided on the upper and lower peak regions of the triangle-waveform surface.

Abstract: Multi-electric discharges in the spark plugs of an electric ignition type engine to be inspected is sustained through a fixed angle of the engine cycle from the timing of spark ignition. For this period the electric discharge wave sustained in the spark plug is displayed. From the electric discharge wave displayed one can determine what are the change in pressure and the conditions of combustion gas in the combustion chamber of the engine.

Abstract: A method of and an apparatus for inspecting conditions of parts of electrical ignition type engines are provided wherein standard electrical waveforms representative of normal and abnormal conditions of parts of an electrical ignition type engine to be inspected are pre-recorded and an actual electrical waveform indicative of the condition of a part of the engine under operation and the corresponding one of the pre-recorded standard waveforms are displayed to permit visual comparison of them.