Abstract: A lens assembly according to the present disclosure includes at least one lens, a spacer, and a barrel. The at least one lens having an effective region configured to refract light, a flange region formed on at least a part surrounding the effective region, and a first cut formed on a sub region of the flange region. The spacer includes a second cut formed to correspond to the first cut and is configured to maintain a distance between multiple lenses mounted in the barrel. Moreover, the barrel is configured to receive the at least one lens and the spacer, in which the lens and the spacer are disposed inside the barrel such that the first cut and the second cut correspond to a third cut formed on an outer circumferential surface of the barrel. Various embodiments of the lens assembly and an electronic device including the same are described herein.

Abstract: The present invention relates to a gaseous sample injection valve. The gaseous sample injection valve includes a middle body injecting a fixed amount of a gaseous sample into the vacuum chamber of a mass spectrometer, the middle body being constituted by a gaseous sample injection tube, a gaseous sample discharge tube, a storage part, and a vacuum chamber connection tube; an upper body accommodating a first solenoid coil, a first plunger, and a first packing; and a lower body accommodating a second solenoid coil, a second plunger, and a second packing. The gaseous sample injection valve according to the present invention may be miniaturized to utilize a lightweight portable mass spectrometer. Also, the vacuum pump may be reduced in load to extend the operation life-cycle of the vacuum pump. In addition, when the gaseous sample is analyzed by using the mass spectrometer, a uniform mass spectrum with respect to the gaseous sample may be obtained.

Abstract: An imaging lens system includes a first lens to a fifth lens sequentially disposed from an object side to an image side. The first lens has a positive refractive power and an object side lens surface that is convex toward the object side. The second lens has a negative refractive power and a meniscus shape that is concave toward the image side. The third lens has a positive refractive power. The fourth lens has a negative refractive power and a meniscus shape that is concave toward the object side. The fifth lens has a negative refractive power and a meniscus shape that is concave toward the image side near an optical axis. The imaging lens system satisfies the following condition: f34/f<?5, where f denotes a focal length of the imaging lens system, and f34 denotes an effective focal length of the third lens and the fourth lens.

Abstract: Provided is a multiple frequency Radio Frequency (RF) amplifier. The multiple frequency RF amplifier includes a waveform generation circuit configured to generate an RF signal by amplitude and frequency-modulating a reference waveform signal, a drive amplifier circuit configured to drive-amplify the RF signal, and a power amplifier circuit configured to generate a multiple frequency RF voltage signal through a power amplification of the drive-amplified RF signal and output the multiple frequency RF voltage signal to an ion trap for a mass spectrometry.

Abstract: The present invention relates to an ion trap mass spectrometer using a cold electron source, in a production of a portable mass spectrometer, in which a microchannel plate (MCP) module is used, initial electrons are induced by injecting ultraviolet photons emitted from an ultraviolet diode to a front surface of the MCP module, electron beams amplified from the electrons are amplified using a channeltron electron multiplier (CEM), the amplified electron beams are accurately adjusted and injected into an ion trap, thus increasing the amplification rate, and since a quadrupole field is used as an ion filter which returns the initially injected electrons to the inside of an ion trap mass separator, the ionization rate increases.

Abstract: Provided is a multiple frequency Radio Frequency (RF) amplifier. The multiple frequency RF amplifier includes a waveform generation circuit configured to generate an RF signal by amplitude and frequency-modulating a reference waveform signal, a drive amplifier circuit configured to drive-amplify the RF signal, and a power amplifier circuit configured to generate a multiple frequency RF voltage signal through a power amplification of the drive-amplified RF signal and output the multiple frequency RF voltage signal to an ion trap for a mass spectrometry.

Abstract: A novel purinylpyridinylamino-2,4-difluorophenyl sulfonamide derivative, a pharmaceutically acceptable salt thereof, a preparation method thereof, and a pharmaceutical composition with an inhibitory activity against Raf kinase, containing the same as an active ingredient are provided. The purinylpyridinylamino-2,4-difluorophenyl sulfonamide derivative of the present invention effectively regulates the activity of B-Raf kinase, and thus may be useful for preventing or treating cancers induced by the over-activation of Raf kinase, especially various melanoma, colorectal cancer, prostate cancer, thyroid cancer, ovarian cancer and the like.

Abstract: Disclosed herein are a nitride semiconductor light-emitting device and a method of manufacturing the same, which are capable of reducing the number of masks by introducing a three-mask process so that the processing becomes simpler and the production yield can be improved.

Abstract: A Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) includes: an ionization source generating ions; a deceleration lens, on which the ions generated by the ionization source and spatially dispersed are incident, selectively decelerating the incident ions so as to decrease the distance between the ions; and an ion cyclotron resonance cell on which the ions passing through the deceleration lens are incident. By preventing dispersing of ions due to mass difference and converging the ions using the deceleration lens, the mass range that can be measured at one time can be extended. Also, measurement sensitivity can be improved since the ions are effectively introduced to the ICR cell.

Abstract: An ion trap mass spectrometer is provided, including: an electron emitter; an ion trap storing ions generated by ionization resulting from an impact with electrons emitted from the electron emitter; a secondary ion filter for blocking out secondary ions generated due to ions selectively released by the ion trap; and a detector detecting ions selectively released from the ion trap, wherein the electron emitter, the ion trap, the secondary ion filter, and the ion detector are arranged on the same axis, so that a pure mass spectrum can be measured by excluding the secondary ions which are causes of background noise signals in the procedure of detection of the ions by the ion trap mass spectrometer.

Abstract: The present invention relates to an ion trap mass spectrometer using a cold electron source, in a production of a portable mass spectrometer, in which a microchannel plate (MCP) module is used, initial electrons are induced by injecting ultraviolet photons emitted from an ultraviolet diode to a front surface of the MCP module, electron beams amplified from the electrons are amplified using a channeltron electron multiplier (CEM), the amplified electron beams are accurately adjusted and injected into an ion trap, thus increasing the amplification rate, and since a quadrupole field is used as an ion filter which returns the initially injected electrons to the inside of an ion trap mass separator, the ionization rate increases.

Abstract: The present invention relates to an ultraviolet diode and an atomic mass analysis ionization source collecting device using an MCP. In the manufacturing of a portable atomic mass analyzer, an object of the present invention is to use an MCP electron multiplier plate, whereby ultraviolet photons emitted from an ultraviolet diode are irradiated on a front surface plate of the MCP electron multiplier plate to induce primary electrons, an amplified electron beam is collected from the electrons, and an electron beam is generated at a low temperature and low power and having a discharge time that is accurately controlled.

Abstract: The present invention relates to a device for obtaining the ion source of a mass spectrometer using an ultraviolet diode and a CEM module, having the purpose of inducing initial electron emission using a CEM module and by radiating ultraviolet photons emitted from the ultraviolet diode to the entrance of the CEM module to obtain a large amount of amplified electron beams from the exit and to produce electron beams the emission times of which are accurately controlled at low temperature and at low power.

Abstract: An imaging lens system includes a first lens to a fifth lens sequentially disposed from an object side to an image side. The first lens has a positive refractive power and an object side lens surface that is convex toward the object side. The second lens has a negative refractive power and a meniscus shape that is concave toward the image side. The third lens has a positive refractive power. The fourth lens has a negative refractive power and a meniscus shape that is concave toward the object side. The fifth lens has a negative refractive power and a meniscus shape that is concave toward the image side near an optical axis. The imaging lens system satisfies the following condition: f34/f<?5, where f denotes a focal length of the imaging lens system, and f34 denotes an effective focal length of the third lens and the fourth lens.

Abstract: The present invention relates to an ultraviolet diode and an atomic mass analysis ionization source collecting device using an MCP. In the manufacturing of a portable atomic mass analyzer, an object of the present invention is to use an MCP electron multiplier plate, whereby ultraviolet photons emitted from an ultraviolet diode are irradiated on a front surface plate of the MCP electron multiplier plate to induce primary electrons, an amplified electron beam is collected from the electrons, and an electron beam is generated at a low temperature and low power and having a discharge time that is accurately controlled.

Abstract: The present invention relates to a gaseous sample injection valve. The gaseous sample injection valve includes a middle body injecting a fixed amount of a gaseous sample into the vacuum chamber of a mass spectrometer, the middle body being constituted by a gaseous sample injection tube, a gaseous sample discharge tube, a storage part, and a vacuum chamber connection tube; an upper body accommodating a first solenoid coil, a first plunger, and a first packing; and a lower body accommodating a second solenoid coil, a second plunger, and a second packing. The gaseous sample injection valve according to the present invention may be miniaturized to utilize a lightweight portable mass spectrometer. Also, the vacuum pump may be reduced in load to extend the operation life-cycle of the vacuum pump. In addition, when the gaseous sample is analyzed by using the mass spectrometer, a uniform mass spectrum with respect to the gaseous sample may be obtained.

Abstract: The present invention relates to an apparatus and method for controlling a pipeline-type ion cyclotron resonance mass spectrometer, in which an ion trap unit of the ion cyclotron resonance mass spectrometer is capable of using two digitizers at the same time, thus enabling a measurement process for detecting an electrical signal which indicates the mass of ions corresponding to a specific purpose, and another measurement process for detecting another electrical signal which indicates the mass of ions corresponding to another specific purpose, to be simultaneously performed. Accordingly, it is an aim of the present invention to provide an apparatus and method for controlling a pipeline-type ion cyclotron resonance mass spectrometer, which can overcome the problems of time delay among control procedures, and can present a signal detection step wherein an excitation electrode is utilized to improve the sensitivity and speed of signal detection.

Abstract: A nitride semiconductor light emitting device and a method of manufacturing the same are disclosed. The nitride semiconductor light emitting device includes an n-type nitride layer; an active layer formed on the n-type nitride layer; a p-type nitride layer formed on the active layer; a current blocking pattern formed on the p-type nitride layer; a transparent conductive pattern formed to cover upper sides of the p-type nitride layer and the current blocking pattern, and having a contact hole through which a portion of the current blocking pattern is exposed; and a p-electrode pad formed on the current blocking pattern and the transparent conductive pattern, and directly connected to the current blocking pattern. The nitride semiconductor light emitting device can improve long term durability by securing excellent light scattering properties while enhancing adhesion of a p-electrode pad.

Abstract: An ion trap mass spectrometer is provided, including: an electron emitter; an ion trap storing ions generated by ionization resulting from an impact with electrons emitted from the electron emitter; a secondary ion filter for blocking out secondary ions generated due to ions selectively released by the ion trap; and a detector detecting ions selectively released from the ion trap, wherein the electron emitter, the ion trap, the secondary ion filter, and the ion detector are arranged on the same axis, so that a pure mass spectrum can be measured by excluding the secondary ions which are causes of background noise signals in the procedure of detection of the ions by the ion trap mass spectrometer.

Abstract: Provided are a controller and a control method for improving signal performance of an ion cyclotron resonance mass spectrometer. The controller and control method apply electric signals for causing ions injected into an ion trap of the ion cyclotron resonance mass spectrometer to be injected to the center of the trap as close as possible to trap electrodes, and adjust biased ion motion by appropriately adjusting signals of trap electrodes for causing the injected ions to make ion motion, thereby improving the fidelity of ion signals. The control method for improving signal performance of an ion cyclotron resonance mass spectrometer includes an ion position adjustment process and an ion signal detection process.