Abstract: Provided is an optical lens formed by integrally molding a lens part that is an optically effective portion and has a light incidence/emission surface, and a lens edge part that is an optically ineffective portion and has a surface thereof except the light incidence/emission surface. The lens edge part includes a non-transparent region in part or all thereof, the lens part and the lens edge part include a thermoplastic resin, and the non-transparent region in the lens edge part contains a total of 0.1-5 mass % of one or more of a black dye and a black pigment.

Abstract: A polycarbonate resin having a high refractive index, a low Abbe number and a high moisture and heat resistance is provided. In an embodiment, a polycarbonate resin including a structural unit represented by general formula (1) below is provided.

Abstract: A switch unit includes a substrate, which includes a hard layer and a soft layer; a first contact point above the soft layer; a second contact point around the first contact point; a conduction spring member which is elastically deformable into contact with the first contact point to make a conduction between the first contact point and the second contact point; a first external electrode; a first through-hole electrode which is electrically connected to the first contact point; and a first wiring pattern, which is electrically connected to the first external electrode and the first through-hole electrode.

Abstract: Provided is an electronic apparatus including a cooling fan and a cover configuring an outer wall of an air flow path and having a heat sink arranged therein, and effectively utilizing a frame as a member for heat radiation. A cooling fan 40 is arranged on the opposite side of a circuit board across an upper frame 20 and attached to the upper frame 20. The electronic apparatus includes a cover having a shape for covering the air flow path and defining a wall of the air flow path together with the upper frame 20. Heat sinks 61 and 62 are arranged on the inner side of the cover 50.

Abstract: The inner edge of a hole 23 surrounding the outer circumference of a first heat sink 61 includes two edges 23a and 23b that are positioned on opposite sides to each other with the first heat sink 61 therebetween. An upper frame (shield) 20 includes spring portions 24 on one edge 23a, which is in contact with the first heat sink 61 to push the first heat sink 61 toward the other edge 23b. Further, the upper frame 20 includes, the other edge 23b, a position determining portion 25 to which the first heat sink 61 is pressed. According to the above electronic apparatus, it is possible to define the position of a metallic component by a shield covering a circuit board and to cause the metallic component and the shield to be in contact stably.

Abstract: Provided is an electronic apparatus including a cooling fan and a cover configuring an outer wall of an air flow path and having a heat sink arranged therein, and effectively utilizing a frame as a member for heat radiation. A cooling fan 40 is arranged on the opposite side of a circuit board across an upper frame 20 and attached to the upper frame 20. The electronic apparatus includes a cover having a shape for covering the air flow path and defining a wall of the air flow path together with the upper frame 20. Heat sinks 61 and 62 are arranged on the inner side of the cover 50.

Abstract: The inner edge of a hole 23 surrounding the outer circumference of a first heat sink 61 includes two edges 23a and 23b that are positioned on opposite sides to each other with the first heat sink 61 therebetween. An upper frame (shield) 20 includes spring portions 24 on one edge 23a, which is in contact with the first heat sink 61 to push the first heat sink 61 toward the other edge 23b. Further, the upper frame 20 includes, the other edge 23b, a position determining portion 25 to which the first heat sink 61 is pressed. According to the above electronic apparatus, it is possible to define the position of a metallic component by a shield covering a circuit board and to cause the metallic component and the shield to be in contact stably.

Abstract: Provided is an electronic apparatus capable of also supplying sufficient air flow to a heat generating device other than the heat sink. An electronic apparatus includes: a cooling unit (10) including a heat sink (13), and a cooling fan (15) for generating air flow for receiving heat of the heat sink (13); an upper wall member (40) connected to the cooling unit (10) so as to form an outer wall defining an air passage continuous with the cooling unit (10); and a power circuit (17) arranged in the air passage and serving as an object to be cooled.

Abstract: A cooling device includes: a heat sink including a plurality of fins formed to be plate shaped, which are arranged in parallel to one another; and a cooling fan arranged in a direction from the heat sink, the direction being perpendicular to perpendicular lines of the fins. A plurality of fins of a side heat sink constituting the heat sink include edges aligned on an oblique line with respect to perpendicular lines of the fins and formed on the outer periphery of the cooling fan. With this structure, it is possible to improve usage efficiency of an air flow generated by the cooling fan.

Abstract: Provided is an electronic apparatus capable of also supplying sufficient air flow to a heat generating device other than the heat sink. An electronic apparatus includes: a cooling unit (10) including a heat sink (13), and a cooling fan (15) for generating air flow for receiving heat of the heat sink (13); an upper wall member (40) connected to the cooling unit (10) so as to form an outer wall defining an air passage continuous with the cooling unit (10); and a power circuit (17) arranged in the air passage and serving as an object to be cooled.

Abstract: A high speed optical analog/digital conversion process with a simple configuration, in which an optical-pulse branching delay multiplexer generates as many duplicates of each optical pulse as the predetermined number of bits by branching each optical pulse string obtained by sampling an input optical analog signal, and generates a temporally consecutive optical pulse string by multiplexing the duplicated optical pulses with a predetermined intensity difference and time difference. An optical encoder and an optical-threshold processing unit perform an encoding and a quantization of an optical pulse string, and output an optical digital signal corresponding to the optical analog signal.

Abstract: A high speed optical analog/digital conversion process with a simple configuration, in which an optical-pulse branching delay multiplexer generates as many duplicates of each optical pulse as the predetermined number of bits by branching each optical pulse string obtained by sampling an input optical analog signal, and generates a temporally consecutive optical pulse string by multiplexing the duplicated optical pulses with a predetermined intensity difference and time difference. An optical encoder and an optical-threshold processing unit perform an encoding and a quantization of an optical pulse string, and output an optical digital signal corresponding to the optical analog signal.

Abstract: An optically sampling device optically samples an optical analog signal using a sampled signal having a predetermined sampling frequency, and outputs control light having a pulse train of an optically sampled optical analog signal. A signal generating device generates a pulse train of signal light which is synchronized with the sampled signal. An optical encoding device optically encodes the pulse train of the signal light according to the control light, by using optical encoders each including nonlinear optical loop mirrors, and outputs pulse trains of optically encoded signal light from said optical encoders, respectively. An optically quantizing device performs optical threshold processing on the pulse trains of optically-encoded signal light to optically quantize them, by using at least one of optical threshold processors each of which is connected to each of said optical encoders and includes a nonlinear optical device, and outputs optically quantized pulse trains as optical digital signals.

Abstract: An optically sampling device optically samples an optical analog signal using a sampled signal having a predetermined sampling frequency, and outputs control light having a pulse train of an optically sampled optical analog signal. A signal generating device generates a pulse train of signal light which is synchronized with the sampled signal. An optical encoding device optically encodes the pulse train of the signal light according to the control light, by using optical encoders each including nonlinear optical loop mirrors, and outputs pulse trains of optically encoded signal light from said optical encoders, respectively. An optically quantizing device performs optical threshold processing on the pulse trains of optically-encoded signal light to optically quantize them, by using at least one of optical threshold processors each of which is connected to each of said optical encoders and includes a nonlinear optical device, and outputs optically quantized pulse trains as optical digital signals.

Abstract: A photoimaging material which comprises a support and a photoimaging layer formed on the support. The photoimaging layer comprises microcapsules and a reducing agent present outside the microcapsules. The microcapsules contain a leuco dye capable of oxidative color formation, a photooxidizing agent and an organosulfur antioxidant. The reducing agent is 2,2′-methylenebis(4-methyl-6-t-butylphenol) or 2,2′-methylenebis(4-ethyl-6-t-butylphenol). The photoimaging material is capable of thermal image fixing based on a method of forming color by radical oxidation of various leuco dyes to the corresponding dyes with a photooxidizing agent. The photoimaging material is not prone to background coloring (fogging) during storage under dark or light conditions after image fixing, and does not foul the inside of the apparatus during thermal image fixing.

Abstract: A heat-sensitive recording material comprising a support having thereon a color-developing layer and at least one UV-absorbing layer with a light-transmittance of 70% or less at 400 nm, 5% or less at 370 nm, and 70% or more for entire visible light range, is disclosed.

Abstract: A heat-sensitive recording material comprising a support having thereon a recording layer containing an electron-donating colorless dye and an electron-accepting compound, wherein the electron-accepting compound is selected from salicylic acid derivatives having an acyl group, a substituted amino group, an aryloxymethyl group, an alkoxy group or an aryloxy group, or metal salts thereof, and hydroxynaphthoic acid derivatives having an alkyloxy group or metal salts thereof, the recording layer further containing a metal compound in an amount of from about 0.05 to about 10 mols per mol of the electron-accepting compound.

Abstract: A heat-sensitive recording material which produces a developed color image with improved light fastness upon application of thermal energy comprising:(1) an electron-donating colorless dye,(2) an electron-accepting compound, and(3) a nickel compound represented by formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represents an aryl group, or they may combine with each other; L represents an organic ligand which forms a complex salt by connecting to the nickel ion via its hetero atom; and n represents an integer of 0, 1 or 2.

Abstract: A heat-sensitive recording material is disclosed. The material is comprised of a support having thereon a heat-sensitive color forming layer comprising at least one electron-donating colorless dye and at least one electron-accepting compound, wherein the electron-donating colorless dye is a fluorene derivative having at least one substituted amino group and the electron-accepting compound has an acid group and a solubility in ethanol of 10 or less at 25.degree. C.The material exhibits improved color developability, improved preservability before recording, improved image stability, and improved chemical resistance.

Abstract: A recording material is described comprising an electron-donating colorless dye and a molybdic acid derivative as a color developer; the material has excellent color developability and shelf life stability, and enables the production of a developed color image with excellent fastness and chemical resistance.