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4183results about How to "Avoid introducing" patented technology

Integrated bi-directional gradient refractive index wavelength division multiplexer

A wavelength division multiplexer integrating a dispersive element having a gradient refractive index with optical lenses to provide efficient coupling from a plurality of input optical fibers (each delivering a plurality of discrete wavelengths to the device) which are multiplexed to a single polychromatic beam for output to a single output optical fiber. The device comprises: (a) an input means for accepting a plurality of optical input beams of different wavelengths from a plurality of optical sources, the means including a planar front surface onto which the optical beams are incident; (b) a dispersive element comprising a radial (or axial) gradient refractive index for combining the plurality of optical input beams into a single optical beam and operatively associated with the planar front surface; (c) a coupler subsystem secured to the dispersive element and comprising (1) a first homogeneous index boot lens having a planar front surface onto which the single optical beam from the dispersive element is incident, (2) an axial gradient refractive index collimating lens affixed to the first homogeneous index boot lens, and (3) a planar back surface from which the single optical beam exits, operatively associated with the axial gradient refractive index collimating lens; and (d) an output means for outputting at least one multiplexed, polychromatic output beam to an optical receiver, the means including the planar back surface. The device is fully bi-directional and may be operated in the forward direction as a multiplexer and in the reverse direction as a demultiplexer.
Owner:AUXORA

Two-dimensional transition metal carbide (nitride) and nano sulfur particulate composite as well as preparation and application thereof

The invention relates to a two-dimensional transition metal carbide (nitride) and nano sulfur particulate composite as well as preparation and application thereof. The composite is formed by two-dimensional transition metal carbide (nitride) MXene nanosheets and nano sulfur particles, wherein the nano sulfur particles grow on the surface of the two-dimensional transition metal carbide (nitride) MXene nanosheets in an in-situ manner, marked as S@MXene. The stable suspension of a single layer or a few layers of two-dimensional transition metal carbide (nitride) MXene nanosheets is mixed with a sodium thiosulfate or sodium polysulfide solution; with formic acid as a reducing agent, the nano sulfur generated by the reaction uniformly grows on the surface of the two-dimensional MXene nanosheet; and the two-dimensional transition metal carbide (nitride) and nano sulfur particulate composite is obtained through neutralization, washing and centrifugation and serves as the anode of a lithium-sulfur battery. According to the invention, a high-conductivity two-dimensional transition metal carbide (nitride) MXene nanosheet carrier is uniformly compounded with nano sulfur particles, introduction of a binder and a conductive agent is not needed, and the composite has excellent electrochemical performance as the anode of a lithium-sulfur battery; and moreover, the technology is simple and can meet the requirements of large-scale production.
Owner:NANJING TECH UNIV

Cartridge for containing a specimen sample for optical analysis

An improved cartridge for holding a fluid sample with a small volume is disclosed herein. The cartridge has a test chamber and a vestibule through which the test fluids are inserted into the test chamber. Improved grips are flared-out to aid manipulation. The handle portion is reinforced to prevent flexing, and a prefabricated trough along the edge of the land surface prevents introduction of the adhesive into the region for analysis. The cartridge has a stopper having a dual sealing mechanism, which seals the test chamber inlet between the vestibule and the test chamber, and the mouth of the vestibule so that when the stopper is in place, the test chamber is closed to the admission of air or other contaminants. The vestibule is similarly closed against escape of the overflow from the test chamber. The stopper is composed of a single elastomer. An improved locking mechanism has two flexible walls on either side of the handhold that locks into their respective keepers on the cartridge to provide a secure lock. Additionally, an improved method for loading the cartridge allows for an even distribution of magnetically responsive particles contained within a fluid sample to be viewed in an array through the optically clear land surface portion of the cartridge.
Owner:MENARINI SILICON BIOSYSTEMS SPA
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