摘要:
A laser device including a wavelength converter of internal resonator type comprises a laser diode 20 for excitation, a light emission section 22 as a solid laser medium excited by the laser 20 and a wavelength converter 23 for converting the wavelength of the laser light from the excited solid laser. The solid laser medium of the light emission section 22 comprises a semiconductor crystal of GaAs, AlGaAs or GaAs-AlGaAs. A second harmonic wave light of a fundamental wave of 0.8 .mu.m band can be easily generated by using a solid laser medium such as a GaAs crystal, an AlGaAs crystal or a superlattice crystal thereof.
摘要:
The invention relates to a non-linear optical material comprising a salt of an organic compound with an optically active organic acid, wherein said organic compound has a conjugated .pi. electron system containing both electron donor and acceptor groups and has at least one substituent group represented by the following formulas (1), (2) and (3) which is located outside of said conjugated .pi. electron system. The invention also concerns a method of manufacturing the optical material and an optical converter which uses the non-linear optical material. ##STR1## According to the invention, a second-order non-linear optical material, which is readily capable of crystal growth, permits a large crystal to be readily obtained, and ensures high hardness of the crystal and gives excellent processibility and non-linear optical characteristics.
摘要:
The invention relates to a non-linear optical material comprising a salt of an organic compound with an optically active organic acid, wherein said organic compound has a conjugated .pi. electron system containing both electron donor and acceptor groups and has at least one substituent group represented by the following formulas (1), (2) and (3) which is located outside of said conjugated .pi. electron system. The invention also concerns a method of manufacturing the optical material and an optical converter which uses the non-linear optical material. ##STR1## According to the invention, a second-order non-linear optical material, which is readily capable of crystal growth, permits a large crystal to be readily obtained, and ensures high hardness of the crystal and gives excellent processibility and non-linear optical characteristics.
摘要:
A nonlinear optical compound of the formula: ##STR1## and optionally a .pi. electron conjugated organic compound having an electron donative group and an electron attractive group, which has high conversion efficiency.
摘要:
A hologram recording device, which comprises a recording layer of a polymer composition a photoconductive element, a second-order super-polarization element and an electron or hole capturing material and having a non-centro symmetric structure is disclosed. Transparent electrode layers are provided on each side of the recording layer. The hologram recording device is capable of space light modulation and real time hologram recording. Also disclosed is a method of manufacturing the hologram recording device and a method of hologram recording using the device. The hologram recording material is of a polymer composition a photoconductive element, a second-order super-polarization element and an electron or hole capturing element. The polymer composition has a non-centro symmetric structure. The hologram recording device according to the invention comprises a recording layer of a polymer composition including a photoconductive element and a second-order super-polarization element. The polymer composition has a non-centro symmetric structure, and transparent electrodes are provided on each side of the recording layer. It is thus possible to provide a hologram recording element, which is suitable for space light modulation and real time hologram recording and which also serves as a phase conjugate device.
摘要:
A laser apparatus includes a semiconductor laser, an optical resonater and a wavelength converter made of a nonlinear optical material. The nonlinear optical material has at least one of aromatic ring and metal ion, and wherein at least one element selected from the group consisting of ion bonding hydrogen, hydrogen bonding hydrogen and hydrogen of water of crystallization is replaced with deuterium. The nonlinear optical material is formed by removing water of crystallization from an organic ionic crystal containing at least one of aromatic ring and metal ion, and recrystallizing with a solvent comprising at least one of ionic bonding deuterium, hydrogen bonding deuterium, and heavy water.
摘要:
A refrigeration system includes an outdoor unit having a refrigeration compressor and a heat exchanger, and an indoor unit having a heat exchanger to be placed where air conditioning is desired. In installing the refrigeration system, the outdoor unit is first connected with the indoor unit via pipe lines, and an air absorbing device containing zeolite as an adsorbent is subsequently placed on the outdoor unit, the indoor unit, or the pipe lines to remove air. The air absorbing device is then separated from the refrigeration system, and refrigerant is caused to circulate through the refrigeration system.
摘要:
A refrigeration system includes an outdoor unit having a refrigeration compressor and a heat exchanger, and an indoor unit having a heat exchanger to be placed where air conditioning is desired. In installing the refrigeration system, the outdoor unit is first connected with the indoor unit via pipe lines, and an air absorbing device containing zeolite as an adsorbent is subsequently placed on the outdoor unit, the indoor unit, or the pipe lines to remove air. The air absorbing device is then separated from the refrigeration system, and refrigerant is caused to circulate through the refrigeration system.
摘要:
A method for constructing a refrigerating cycle that has a unit having a refrigerating compressor which is filled with a part or all of a quantity of working medium beforehand and a heat exchanger, and a unit having a heat exchanger that is located in an area of air conditioning and refrigeration, wherein the units are connected with each other by piping, uses such steps of: connecting the unit having the refrigerating compressor and heat exchanger with the unit having the heat exchanger that is located in an area of air conditioning and refrigeration by means of piping; removing oxygen in a system of the refrigerating cycle by providing an oxygen absorbent in a course of a refrigerant circulating path; separating the oxygen absorbent from the refrigerating cycle; and circulating a refrigerant in the refrigerating cycle, wherein the separating step is carried out immediately after or after the removing step, and the refrigerant circulating step is a final step.
摘要:
A control apparatus for controlling an image forming apparatus that forms and outputs an image on paper, a method of controlling the image forming apparatus, and a program for controlling the image forming apparatus stored on a recording medium are described. The image forming apparatus includes a pair of rollers that sandwich the paper and the center of an axle of at least one of the rollers is displaceable. The control apparatus includes a roller position detection signal generator that generates a detection signal indicating a position of the roller, a roller position detection signal acquisition unit to acquire multiple detection signals in chronological order, a paper thickness calculator to calculate paper thickness based on the multiple detection signals acquired in chronological order, and a vibration detector to detect vibration of the image forming apparatus based on the multiple detection signals acquired in chronological order.