摘要:
Optical fibers 301-308 are housed in V-grooves formed on a V-block 20 with end faces 311-318 flush with an end face 22 of the V-block 20. Therefore, when the optical fibers 301-308 are connected to optical waveguides, the V-block 20 suppresses the oscillation of the end faces 311-318 of the optical fibers 301-308. This structure increases the alignment precision and increases the intensity of the optical fibers 301-308.
摘要:
A high frequency module for transmitting and receiving, for example, communication signals of GSM/DCS/PCS/WCDMA systems through a single antenna, is provided at a relatively small size and low cost. The high frequency module includes a diplexer arranged to separate communication signals from the antenna into GSM communication signals in lower frequency bands and PCS/DCS/WCDMA communication signals in higher frequency bands, a diode switch circuit that is connected to a input and output terminal of the GSM communication signal of the diplexer and is arranged to switch transmission and reception of the GSM communication signal, and a multipoint GaAsIC switch that is connected to the GSM/DCS/PCS/WCDMA communication signals of the diplexer and is arranged to switch transmission and reception of these signals. The high frequency module switches the four types of communication signals by changing the patterns of controls signals VcG, VC1, and Vc2 that are applied to the diode switch circuit and the GaAsIC switch.
摘要:
A retarder includes a transparent support substrate, a prism layer including a plurality of microprisms arranged on one of main surfaces of the transparent support substrate, where each of the microprisms has a sloped prism face formed at the same slope angle with respect to the one main surface in the same direction, an optical anisotropic medium layer disposed on the sloped prism face so that an optic axis of the optical anisotropic medium layer is directed in one of a direction of the maximum sloped prism face of the microprisms and a direction perpendicular to the direction of the maximum sloped prism face, and a planarizing layer disposed on the transparent support substrate so as to embed the optical anisotropic medium layer therein. The planarizing layer is formed from a material having an index of refraction that is substantially the same as that of the microprisms.
摘要:
There is provided a solid-state imaging device, including: a semiconductor substrate having a plurality of pixels, each having a photoelectric conversion portion, formed therein; and a laminated film formed on said semiconductor substrate; wherein said laminated film includes a hydrogen desorbing film for desorbing hydrogen, and a hydrogen blocking-off film disposed so as to overlie said hydrogen desorbing film.
摘要:
A vehicular illumination device includes a light distribution control unit, a determination unit and a control unit. The light distribution control unit performs an alteration control of a vehicular illumination unit so as to alter a light distribution with respect to an illumination object detected by a detection unit. When the illumination object ceases to be detected, the determination unit determines whether or not there is a need to maintain the alteration control in a current state. When it is determined that there is a need to maintain the alteration control in the current state, the control unit controls the light distribution control unit so as to maintain the alteration control in the current state.
摘要:
A laser-diode pumped solid-state laser apparatus comprises at least one laser diode producing a pumping laser light, and at least one laser light generator including a monocrystalline substance doped with a dopant element and pumped with the pumping laser light from at least one laser diode, the monocrystalline substance containing the dopant element with a concentration profile such that the dopant element increases a concentration thereof in a direction perpendicular to a laser oscillation direction gently in the form of a slope from a near zero concentration.
摘要:
According to the present invention, there is provided a method for preparing an optically active compound, characterized in that said method comprises permitting a mixture of optical isomers relative to the carbon atom in the β-position in relation to the carbon atom bound to an esterified hydroxy group of an enol ester to hydrolyse either one optical isomer preferentially in the presence of an enzyme and allowing the carbonyl compound resulting from such hydrolysis to enrich the proportion of its isomer having either one configuration in the β-position in relation to the carbonyl group or allowing the enol ester left non-hydrolyzed to enrich the proportion of its isomer having either one configuration on the carbon atom in the β-position in relation to the carbon atom to which the esterified hydroxyl group bonds.
摘要:
An optical waveguide coupler for optically coupling an optical waveguide and an optical component having mutually different spot sizes, includes (1) a first spot size converting part, placed on the optical waveguide side, that converts a spot size with higher efficiency for an optical signal of a long wavelength band than for an optical signal of a short wavelength band, and (2) a second spot size converting part, placed on the optical component side, that converts a spot size with higher efficiency for the optical signal of the short wavelength band than for the optical signal of the long wavelength band.
摘要:
The present invention is to provide a method for preparing easily and efficiently β-butyrolactones and/or optically active 3-hydroxycarboxylic acid derivatives in high optical purity by use of an easily available hydrolase, which are useful as intermediates for pharmaceuticals, agrochemicals and the like. More particularly, the present invention relates to a method for preparing β-butyrolactones and/or optically active 3-hydroxycarboxylic acid derivatives with an optical purity of substantially 100% ee, comprising reacting a β-butyrolactone which is a mixture of optical isomers, with a nucleophilic agent in the presence of a hydrolase, provided that a lipase derived from porcine pancreas is excluded.
摘要:
A geometrical isomer composition excellent in odor and in chemical resistance, which is applicable to a base material containing a strongly alkaline chemical or a strongly acidic chemical, which can suppress the deterioration with time and the color change of the base material in the case that the material is exposed to light, and which also have highly tasteful and unique fruity floral fragrance. A geometrical isomer composition containing 93 to 99% by weight of optically active trans-1-(2,2,6-trimethylcyclohexyl)-2-buten-1-one represented by Formula-1 or a mixture thereof and 7 to 1% by weight of optically active cis-1-(2,2,6-trimethylcyclohexyl)-2-buten-1-one represented by Formula-2 or a mixture thereof is, respectively, used