Abstract: The disclosure provides an optical lens system and a vehicle camera. From an object side to an imaging surface, the optical lens system sequentially includes a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power, the fourth lens and the fifth lens constituting a cemented lens; a sixth lens having a positive refractive power; a seventh lens with a negative refractive power; a stop disposed between the first lens and the third lens. The lens of the present disclosure not only has thermal stability, but also has extremely high resolution for the objects that emit or reflect monochromatic lights of different wavelengths, so as to meet the requirements of the driverless vehicle system on the lens.

Abstract: A collimator lens system includes a first lens, a second lens, a third lens and a diaphragm from an object side to an image side of the system in turn along an optical axis, in which the first lens is of a positive focal power, and an object side surface thereof is convex; the second lens is of a negative focal power; the third lens is of a positive focal power, and an image side surface thereof is convex; optical centers of all the lenses are arranged along a same straight line, the system meets following formulas: f12>f3; (dn/dt)1<-50×10?6/° C.; (dn/dt)2<-50×10?6/° C.; (dn/dt)3>-10×10?6/° C., where f12 represents a combined focal length of the first and second lenses, f3 represents a focal length of the third lens, and (dn/dt)1, (dn/dt)2, and (dn/dt)3 represent change rates of refractive indices of the first lens, the second lens and the third lens with temperature, respectively.

Abstract: A collimator lens includes a first lens, a second lens and a diaphragm from an object side to an image side of the assembly in turn along an optical axis, in which the first lens is of a positive focal power, and an object side surface thereof is convex; the second lens is of a positive focal power, and an image side surface thereof is convex; optical centers of the first lens and the second lens are arranged along a same straight line, the system meets following formulas: f1>f2; (dn/dt)1<?50×10?6/° C.; (dn/dt)2>?10×10?6/° C., where f1 represents a focal length of the first lens, f2 represents a focal length of the second lens, (dn/dt)1 represents a change rate of a refractive index of the first lens with temperature, and (dn/dt)2 represents a change rate of a refractive index of the second lens with temperature.

Abstract: A collimator lens includes a first lens, a second lens and a diaphragm from an object side to an image side of the assembly in turn along an optical axis, in which the first lens is of a positive focal power, and an object side surface thereof is convex; the second lens is of a positive focal power, and an image side surface thereof is convex; optical centers of the first lens and the second lens are arranged along a same straight line, the system meets following formulas: f1>f2; (dn/dt)1<?50×10?6/° C.; (dn/dt)2>?10×10?6/° C., where f1 represents a focal length of the first lens, f2 represents a focal length of the second lens, (dn/dt)1 represents a change rate of a refractive index of the first lens with temperature, and (dn/dt)2 represents a change rate of a refractive index of the second lens with temperature.

Abstract: The present disclosure relates to template data processing, template data requesting, and template data presenting methods and devices, and a storage medium. The method includes obtaining a template subject and template key words matching the template subject and generating, according to the template key words, a first template message matching the template subject. The first template message includes the template key words. The method also includes generating a template identifier corresponding to the first template message and associating the template identifier with the corresponding first template message. The method further includes storing the template identifier and the corresponding first template message into a template library.

Abstract: The present invention discloses an optical module and a detection circuit thereof. The detection circuit includes: a sampling module, including a first potentiometer configured to convert a sampling current into a sampling voltage; an amplifying module, coupled to an output end of the sampling module and configured to amplify the sampling voltage; and an analog-to-digital conversion module, coupled to an output end of the amplifying module and configured to convert the amplified sampling voltage into a digital signal for detection. By arranging a potentiometer in a sampling module of a detection circuit, a resistance value of the sampling module can be adjusted, thereby adapting to responsivities of different modulators, increasing the locking speed of a modulator, preventing horizontal shifts of a locking point and a false locking point, and reducing the occupied PCB area.

Abstract: The invention relates to an ink cartridge refilling device, which comprises an ink container, an ink injection channel, an air suction channel, an air inlet channel and a leakage-proof component, wherein both the air suction channel and the air inlet channel are arranged inside the ink container; and the leakage-proof component is arranged on the air inlet channel. As both the air suction channel and the air inlet channel are arranged inside the ink container, the ink cartridge refilling device has the advantages of having compact overall structure, small space usage and simple operation, reducing the number of dies in the manufacturing process, fully reducing the manufacturing cost, and solving the technical problems of large space usage, trivial operation and high manufacturing cost in the traditional ink cartridge refilling device.

Abstract: A receiving apparatus and method, a sending apparatus and method, a front-end circuit, a modulator, and a transceiving system are provided. The sending apparatus includes: a double-sideband OFDM modulator, configured to perform double-sideband OFDM modulation on a bit sequence of service data to obtain a double-sideband OFDM analog electrical signal, where the double-sideband OFDM analog electrical signal carries the service data on both positive and negative sidebands, and an IQMZ, configured to perform optical carrier modulation on the double-sideband OFDM analog electrical signal to obtain a double-sideband OFDM optical signal, where the double-sideband OFDM optical signal carries the service data on both positive and negative sidebands. In comparison with a traditional manner in which service data is only carried on a positive sideband, bandwidth utilization in the present invention doubles.

Abstract: A receiving apparatus and method, a sending apparatus and method, a front-end circuit, a modulator, and a transceiving system are provided. The sending apparatus includes: a double-sideband OFDM modulator, configured to perform double-sideband OFDM modulation on a bit sequence of service data to obtain a double-sideband OFDM analog electrical signal, where the double-sideband OFDM analog electrical signal carries the service data on both positive and negative sidebands, and an IQMZ, configured to perform optical carrier modulation on the double-sideband OFDM analog electrical signal to obtain a double-sideband OFDM optical signal, where the double-sideband OFDM optical signal carries the service data on both positive and negative sidebands. In comparison with a traditional manner in which service data is only carried on a positive sideband, bandwidth utilization in the present invention doubles.

Abstract: The present invention provides a signal detection method, including: receiving, by a frequency mixer, wavelength division multiplexing signals and a local oscillator signal, where a wavelength of the local oscillator signal and a wavelength of a target signal in the wavelength division multiplexing signals are the same; a frequency mixer performs interference on the wavelength division multiplexing signals through the local oscillator signal to obtain a coherent signal formed by the local oscillator signal and the target signal; sending the coherent signal to a transimpedance amplifier for amplification to obtain a voltage signal; and obtaining the power of the target signal according to a power amplitude of the voltage signal.

Abstract: The invention relates to a negative-pressure ink cartridge refilling device, system and method. The device comprises an ink container used to store ink, an ink injection channel, an aspirator and a suction channel communicated with the ink container, wherein one end of the ink injection channel is an ink inlet end while the other end is an ink outlet end connected with the ink cartridge to be refilled; a sucking opening connected with the aspirator is formed on the suction channel; and the inlet end is disposed above the ink level surface of the ink container. Therefore, the ink in the ink container cannot be overflowed via the ink injection channel regardless of the environmental factors, and thus the technical problem that the phenomenon of ink splash tends to occur when the traditional negative-pressure ink cartridge refilling device is used by a user for the first time can be solved.

Abstract: The present invention discloses an optical module and a detection circuit thereof. The detection circuit includes: a sampling module, including a first potentiometer configured to convert a sampling current into a sampling voltage; an amplifying module, coupled to an output end of the sampling module and configured to amplify the sampling voltage; and an analog-to-digital conversion module, coupled to an output end of the amplifying module and configured to convert the amplified sampling voltage into a digital signal for detection. By arranging a potentiometer in a sampling module of a detection circuit, a resistance value of the sampling module can be adjusted, thereby adapting to responsivities of different modulators, increasing the locking speed of a modulator, preventing horizontal shifts of a locking point and a false locking point, and reducing the occupied PCB area.

Abstract: The present invention provides a signal detection method, including: receiving, by a frequency mixer, wavelength division multiplexing signals and a local oscillator signal, where a wavelength of the local oscillator signal and a wavelength of a target signal in the wavelength division multiplexing signals are the same; a frequency mixer performs interference on the wavelength division multiplexing signals through the local oscillator signal to obtain a coherent signal formed by the local oscillator signal and the target signal; sending the coherent signal to a transimpedance amplifier for amplification to obtain a voltage signal; and obtaining the power of the target signal according to a power amplitude of the voltage signal.

Abstract: The invention relates to an ink cartridge refilling device, which comprises an ink container, an ink injection channel, an air suction channel, an air inlet channel and a leakage-proof component, wherein both the air suction channel and the air inlet channel are arranged inside the ink container; and the leakage-proof component is arranged on the air inlet channel. As both the air suction channel and the air inlet channel are arranged inside the ink container, the ink cartridge refilling device has the advantages of having compact overall structure, small space usage and simple operation, reducing the number of dies in the manufacturing process, fully reducing the manufacturing cost, and solving the technical problems of large space usage, trivial operation and high manufacturing cost in the traditional ink cartridge refilling device.

Abstract: An endoscope simulation apparatus aims to offer improved simulation, a simpler structure and can be fabricated at lower costs. The endoscope simulation apparatus comprises a bracing rack, a spheroid and a controlling bar. The spheroid is held in the bracing rack and turnable freely. The controlling bar is slidable relative to the spheroid in a passage running through the center of the spheroid to control rotation of the spheroid. The bracing rack has an inner side spaced from the spheroid to hold at least two direction sensors. The controlling bar has a depth sensor. The controlling bar is a simulated endoscope and also is insertable and retractable. The invention can be turned at a greater angle and provide improved simulation through the turnable spheroid. Through the direction sensors and depth sensor that are linked to a computer, the turning angle and insertion depth of the simulated endoscope can be measured.

Abstract: An endoscope simulation apparatus aims to offer improved simulation, a simpler structure and can be fabricated at lower costs. The endoscope simulation apparatus comprises a bracing rack, a spheroid and a controlling bar. The spheroid is held in the bracing rack and turnable freely. The controlling bar is slidable relative to the spheroid in a passage running through the center of the spheroid to control rotation of the spheroid. The bracing rack has an inner side spaced from the spheroid to hold at least two direction sensors. The controlling bar has a depth sensor. The controlling bar is a simulated endoscope and also is insertable and retractable. The invention can be turned at a greater angle and provide improved simulation through the turnable spheroid. Through the direction sensors and depth sensor that are linked to a computer, the turning angle and insertion depth of the simulated endoscope can be measured.