Patent application number | Description | Published |
20080219308 | Quantum cascade laser - A quantum cascade laser is composed of a semiconductor substrate, and an active layer provided on the semiconductor substrate and having a cascade structure formed by multistage-laminating unit laminate structures | 09-11-2008 |
20080219312 | QUANTUM CASCADE LASER DEVICE - In a quantum cascade laser device | 09-11-2008 |
20090052488 | QUANTUM CASCADE LASER ELEMENT - A DFB quantum cascade laser element that can reliably CW-oscillate a single-mode light even at room temperature or a temperature in proximity thereof is provided. In a quantum cascade laser element | 02-26-2009 |
20110024721 | SEMICONDUCTOR LIGHT EMITTING DEVICE - A semiconductor light emitting device including a semiconductor substrate and an active layer which is formed on the substrate and has a cascade structure formed by multistage-laminating unit laminate structures | 02-03-2011 |
20110026556 | QUANTUM CASCADE LASER - A quantum cascade laser is configured to include a semiconductor substrate and an active layer which is provided on the substrate and has a cascade structure formed by multistage-laminating unit laminate structures | 02-03-2011 |
20110286486 | QUANTUM CASCADE LASER - A quantum cascade laser is configured to include a semiconductor substrate, and an active layer provided on the substrate and having a cascade structure formed by multistage-laminating unit laminate structures | 11-24-2011 |
20120134380 | QUANTUM CASCADE LASER - A quantum cascade laser is configured to include a semiconductor substrate, and an active layer that is provided on the substrate and has a cascade structure formed by alternately laminating emission layers and injection layers by multistage-laminating unit laminate structures each consisting of the quantum well emission layer and the injection layer, and generates light by intersubband transition in a quantum well structure. In a laser cavity structure for light with a predetermined wavelength generated in the active layer, a front reflection film with a reflectance of not less than 40% and not more than 99% for laser oscillation light is formed on the front end face that becomes a laser beam output surface, and a back reflection film with a reflectance higher than that of the front reflection film for the laser oscillation light is formed on the back end face. | 05-31-2012 |
20120219022 | WAVELENGTH-TUNABLE LIGHT SOURCE - A wavelength-tunable light source includes a quantum cascade laser that emits light from a first end and a second end, an optical system that collimates the light emitted from the first end, a first reflecting section on which the light collimated by the optical system is made incident, and a second reflecting section that partially reflects the light emitted from the second end of the quantum cascade laser and transmits the remaining light. The first reflecting section includes a plurality of diffractive gratings whose diffractive properties are different from each other and whose lattice plane directions are variable, and the first reflecting section diffracts a light at a particular wavelength corresponding to the diffractive property and the lattice plane direction of the selected diffractive grating in the direction opposite to the incident direction. | 08-30-2012 |
20130322479 | QUANTUM CASCADE LASER - A quantum cascade laser includes a semiconductor substrate, and an active layer that is provided on the substrate, and has a cascade structure in which emission layers and injection layers are alternately laminated by multistage-laminating unit laminate structures each consisting of the quantum well emission layer and the injection layer, the active layer generates light by intersubband transition in a quantum well structure. Further, in a laser cavity structure for light with a predetermined wavelength to be generated in the active layer, reflection control films including at least one layer of CeO | 12-05-2013 |
20130322480 | QUANTUM CASCADE LASER - A quantum cascade laser includes a semiconductor substrate, and an active layer that is provided on the substrate, and has a cascade structure in which emission layers and injection layers are alternately laminated by multistage-laminating unit laminate structures each consisting of the quantum well emission layer and the injection layer, and generates light by intersubband transition in a quantum well structure. Further, in a laser cavity structure for light with a predetermined wavelength to be generated in the active layer, CeO | 12-05-2013 |
20140030671 | DENTAL THERAPY APPARATUS - A dental therapy apparatus which enables a dental therapy more surely and less invasively is provided. A dental therapy apparatus ( | 01-30-2014 |
20140199798 | QUANTUM CASCADE LASER MANUFACTURING METHOD - A quantum cascade laser manufacturing method includes: a step of pressing a mother stamper against a resin film having flexibility to make a resin stamper | 07-17-2014 |
20140241392 | QUANTUM CASCADE LASER - A quantum cascade laser | 08-28-2014 |
20150117484 | QUANTUM CASCADE LASER - A quantum cascade laser includes a semiconductor substrate, and an active layer being provided on the substrate, and having a cascade structure in which quantum well emission layers and injection layers are alternately laminated, and the laser has a base portion including the substrate, and a stripe-shaped ridge portion including the active layer. Further, a reflection control film is formed from a ridge end face over a base end face on an end face in a resonating direction of the laser, and, on the base end face, for a second side and a third side adjacent to a first side on the ridge portion side of the base end face, and a fourth side facing the first side, the reflection control film is formed on a region other than regions near those three sides with predetermined widths. | 04-30-2015 |
20150123076 | QUANTUM CASCADE DETECTOR - A quantum cascade detector includes a semiconductor substrate, and an active layer formed by laminating unit laminate structures each having an absorption region with a first barrier layer to a second well layer and a transport region with a third barrier layer to an n-th well layer. A second absorption well layer has a layer thickness ½ or less of that of a first absorption well layer thickest in one period, and a coupling barrier layer has a layer thickness smaller than that of an exit barrier layer thickest in one period. The unit laminate structure has a detection lower level arising from a ground level in the first well layer, a detection upper level generated by coupling an excitation level in the first well layer and a ground level in the second well layer, and a transport level structure for electrons. | 05-07-2015 |
20160087408 | QUANTUM-CASCADE LASER - A quantum cascade laser is configured with a semiconductor substrate and first and second active layers provided in series on the substrate. A unit laminate structure of the first active layer has a subband level structure having an emission upper level and an emission lower level, and is configured so as to be able to generate light of a first frequency ω | 03-24-2016 |
Patent application number | Description | Published |
20110249049 | INK JET PRINTING APPARATUS AND INK JET PRINTING METHOD - An ink jet printing apparatus is provided that can perform printing without degrading printing quality. In the present invention, correction for a head-to-sheet distance change is performed for both forward printing and backward printing during a multi-path printing operation. | 10-13-2011 |
20110249062 | INKJET PRINTING APPARATUS AND PRINT POSITION ADJUSTING METHOD - An inkjet printing apparatus and a print position correction method are provided which, even if satellites are produced, can evaluate printed position misalignments of main droplets without being influenced by the satellites and correctly perform a print position correction. To this end, when the test patterns are printed, the carriage speed and the head-medium distance are set smaller than those used during normal printing operations so as to keep the influences of the satellites on the printed patterns minimal. From the printed test patterns an amount of print position misalignment is acquired. Before actually executing a normal printing operation, an amount of the print position misalignment corresponding to the carriage speed and the head-medium distance of the actual printing operation is determined based on the amount of misalignment obtained from the test patterns and the print position adjustment is made using the determined amount of the print position misalignment. | 10-13-2011 |
20120026227 | INK JET PRINTING APPRATUS AND PRINTING METHOD - An ink jet printing apparatus and printing method are provided that can, without the addition of a special structure, suppress density imbalance between the print images formed by ink ejected from each of the ejection ports formed on a print head. As for the plurality of ejection ports, one portion of them are established as multiple impact ejection ports that form multiply impacted pixels at which the number of times ink is impacted at the same area is greater than at other pixels of the print area. And, print control is carried out such that more multiply impacted pixels are printed at print areas printed using ejection ports at the ends of the print head than at print areas printed without using ejection ports at the ends of the print head. | 02-02-2012 |
20120062636 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - There is provided an image processing apparatus in which in a case of tone-expressing one pixel corresponding to a plurality of areas (printing resolution) in a multi-pass print, it is possible to output a uniform image without graininess or density unevenness over all-tone regions from a low-density region to a high-density region. To this end, by referring to dot patterns in which a print or a non-print of dots onto each pixel (area) corresponding to a printing resolution are in advance defined, quantization data is converted into binary data having the higher printing resolution. At this time, the dot patterns are prepared to be different from each other for M times of scans in a multi-pass print of M passes. In consequence, it is possible to restrict a variation of a coverage ratio due to a printing position displacement in each printing scan. | 03-15-2012 |
20130021399 | INK JET RECORDING APPARATUS - An inkjet recording apparatus includes a recording head, a cap, and a preliminary discharge unit. The recording head can discharge a plurality of types of ink. The cap caps a discharge port face of the recording head. The preliminary discharge unit causes the recording head to execute a preliminary discharge. The preliminary discharge unit changes a preliminary discharge operation according to a length of time during which the discharge port face is capped by the cap. | 01-24-2013 |
20130201238 | PRINTING APPARATUS AND PRINTING CONTROL METHOD THEREOF - This invention relates to suppression of density unevenness caused by occurrence of ink-landing position shifts between print scans. In an embodiment, upon printing by scanning an inkjet printhead including printing elements, the following control is executed. That is, in order to form an image by print scans of the printhead on a single print area on a print medium, image data are acquired in correspondence with the respective scans. Also, the printing elements are partitioned into plural groups each including continuously arrayed printing elements, and the printing elements in each of the plural groups are time-divisionally driven based on drive sequences. Then, the drive sequences upon time-divisional driving in respective scans are set to include elements having the same drive timings and those having different drive timings. | 08-08-2013 |
20130329235 | DATA PROCESSING APPARATUS AND PRINT DATA GENERATING METHOD - Textures in a printed image are reduced with a configuration that, provided that a matrix made up of a plurality of dot arrangement patterns is treated as a unit, binarizes image data is repeatedly applying such a matrix to the image data. Specifically, when a shift value K=k, a shift process calculates X+kY for the position (X, Y) of each cell in a 4×4 base matrix. The dot arrangement patterns are then shifted overall such that the cell where the value is k from among these values moves to the position (0, 0). The shift process is conducted while setting different shift values for every repeated use of the base matrix. As a result, regular textures are decreased in the case of using a base matrix made up of a gradation value Lv1 on a pixel area. | 12-12-2013 |
20160052263 | APPARATUS AND METHOD OF INK-JET RECORDING AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM - An apparatus and a method of recording in which an ink ejection failure due to an excessive rise in the temperature of ejection ports is prevented while preventing a decrease in throughput. If ink can run out and the amount of ink ejected to one unit area is large, recording on the unit area is performed with an increased number of scans. | 02-25-2016 |
20160052264 | INKJET PRINTING APPARATUS, INKJET PRINTING METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM - The inkjet printing apparatus uses a different scanning condition in printing for a unit region on the back side of a printing medium corresponding to a unit region on the front side of the printing medium where cockling is estimated to occur. | 02-25-2016 |
20160052308 | PRINTING APPARATUS AND CONTROL METHOD THEREOF - A printing apparatus comprises a maintenance unit configured to execute a maintenance operation between a completion of printing on a preceding sheet serving as the printing sheet fed from a stacking unit first and a start of printing on a succeeding sheet serving as the printing sheet fed from the stacking unit next, and a determination unit configured to determine whether to execute the maintenance operation, wherein the determination unit determines, based on a feeding method of the succeeding sheet, whether to execute the maintenance operation. | 02-25-2016 |
Patent application number | Description | Published |
20100033533 | INK JET PRINTING APPARATUS - In an ink jet printing apparatus using many types of inks to execute bidirectional printing, if ejection opening rows for yellow, magenta, and cyan inks are symmetrically arranged, ejection opening rows for a black ink are arranged adjacent to the most inside ejection opening rows for the yellow ink. Thus, a difference in color between forward scanning and backward scanning is determined by a difference in coloring between the black ink and the yellow ink. In this case, a possible color drift attributed to bidirectional printing can be suppressed by selecting the inks so that the difference in coloring between the black ink and the yellow ink is smaller than that between the black ink and the other color inks. | 02-11-2010 |
20110285787 | INK JET PRINTING APPARATUS - In an ink jet printing apparatus using many types of inks to execute bidirectional printing, if ejection opening rows for yellow, magenta, and cyan inks are symmetrically arranged, ejection opening rows for a black ink are arranged adjacent to the most inside ejection opening rows for the yellow ink. Thus, a difference in color between forward scanning and backward scanning is determined by a difference in coloring between the black ink and the yellow ink. In this case, a possible color drift attributed to bidirectional printing can be suppressed by selecting the inks so that the difference in coloring between the black ink and the yellow ink is smaller than that between the black ink and the other color inks. | 11-24-2011 |