49results about How to "High dispersion" patented technology

A wide field of view monocentric lens system for an infrared aerial reconnaissance camera includes front and rear lens shell elements and a core lens element, with the number of front and rear shell lens elements depending on the IR band of interest (LWIR, MWIR or SWIR). Infrared radiation entering the monocentric lens passes sequentially through the front shell lens element(s), the core lens element, and the rear shell lens element(s) and is focused onto a curved focal surface. The front shell lens element(s) and the rear shell lens element(s) are made of material having a relatively higher refractive index or a relatively higher optical dispersion, or both, in the band of interest, as compared to the core lens element.

A process to prepare stoichiometric-nanostructured materials comprising generating a plasma, forming an "active volume" through introduction of an oxidizing gas into the plasma, before the plasma is expanded into a field-free zone, either (1) in a region in close proximity to a zone of charge carrier generation, or (2) in a region of current conduction between field generating elements, including the surface of the field generation elements, and transferring energy from the plasma to a precursor material to form in the "active volume" at least one stoichiometric-nanostructured material and a vapor that may be condensed to form a stoichiometric-nanostructured material. The surface chemistry of the resulting nanostructured materials is substantially enhanced to yield dispersion stable materials with large zeta-potentials.

The invention discloses a high nickel ternary lithium ion battery anode slurry and a preparation method thereof. The anode slurry comprises the following raw materials in parts by weight: 89.5 to 97.9 parts of high nickel ternary anode powder, 1 to 5 parts of conductive agent, and 1 to 5 parts of adhesive, and also comprises mixed additives accounting for 0.1 to 0.5% of the weight of all solid powder and a proper amount of solvent, wherein the mixed additives comprise dispersed additives and acidic buffering type additives, and due to the solvent, the solid content of the anode slurry is in a range of 60 to 85%. Through the mixed additive, the acid/alkali property of the surface of the high nickel ternary anode powder is improved, the dispersing force of the anode powder is enhanced, the using amount of the solvent is reduced, and the slurry production time is reduced. At the same time, the problem that the slurry becomes thick due to the change of pH value of the slurry surface after being contacted with the environment during the preparation process is solved, and the obtained anode slurry is uniform and is good in flowing property.

The invention provides optical glass. The optical glass comprises the following components in percentage by weight: 25-45% of SiO2; 2-15% of ZrO2; 35-60% of Nb2O5; 1-10% of Li2O; 2-15% of Na2O; and 0-10% of k2O. According to the optical glass of the invention, the optical glass has excellent crystallization resistance by containing a proper amount of SiO2, alkali metal oxide and other components;the optical glass with high refractive index and high dispersion is obtained by containing Nb2O5, ZrO2 and other oxide components with high refractive index; through reasonable component design, the optical glass has low relative partial dispersion.

This invention relates to large field area and chromatic dispersion photon transistor in the field of fiber communication system chromatic dispersion compensation technique, which is characterized by the following: the fiber comprises non-symmetric couple double core structure with six groups evenly distributed along circle; the other group is located in the circle center, wherein, each group orderly comprises the following: inner core of solid silicon dioxide; inner cover layer composed of air holes and silicon dioxide along fiber radius direction; outer core of one ring of air hole with its radius of 40%+/-5%.

Dispersive properties of a linear dispersive delay line are retained in a spiral configuration by constraining the radius of curvature depending on a desired propagation mode. The compact form factor spiral can be either a continuous spiral or a piecewise linear approximation. The spiral comprises a highly dielectric waveguide such as titanium dioxide or barium tetratitanate. Preferably, a spacer with a low dielectric constant and a microstrip are disposed on the top surface. The microstrip prevents attenuation of low frequencies, thereby increasing the operating frequency range. A second dielectric spacer and a second microstrip can be deposited on the bottom surface of the waveguide. Alternatively, the bottom surface of the waveguide can face a ground plane. The waveguide can be fed by horns or half-horns.

An aspect of the present invention relates to optical glass, wherein, in a glass composition based on oxides, a content of P₂O₅ is in the range of 20˜34 weight %; a content of B₂O₃ is over 0 weight % but 10 weight % or less; a weight ratio (B₂O₃/P₂O₅) is over 0 but less than 0.39; a weight ratio [TiO₂/(TiO₂+Nb₂O₅+WO₃+Bi₂O₃+Ta₂O₅)] is in the range of 0.059˜0.180; and a weight ratio [(P₂O₅+B₂O₃+SiO₂)/(Na₂O+K₂O+Li₂O)] is in the range of 1.39˜1.80, the optical glass having a refractive index nd of 1.78˜1.83, and an Abbe's number vd of 20˜25.

The invention provides optical glass with high refraction power and low chromatic dispersion. The optical glass comprises, by weight, 1 to 30% of B2O3, 0.1 to 15% of SiO2, 25 to 52% of La2O3, 1 to 30% of Gd2O3, more than 0 and no more than 12% of Y2O3, 1 to 10% of ZrO2, 1 to 30% of Nb2O5, 0 to 10% of Ta2O5, 0 to 5% of TiO2, 0 to 5% of WO3, 0 to 10% of ZnO, 0 to 10% of Al2O3 and 0 to 10% of GeO2. The glass does not contain PbO and F and has a refractive index in a range of 1.86 to 1.92 and an Abbe number in a range of 37 to 42. The environment-friendly optical glass with excellent transmittance, high refraction power and low chromatic dispersion is obtained by introducing a proper amount of rare earth oxide components with high refraction power and low chromatic dispersion.

A method of producing a cellulose derivative aqueous dispersion, comprising: dissolving a cellulose derivative having a carboxyl group in an organic solvent to obtain a solution; dispersing the solution and water in the presence of an alkali in an amount corresponding to 1-65 mol % of the carboxyl groups to obtain a dispersion; removing the organic solvent from the dispersion to obtain a pre-treatment aqueous dispersion; and removing a part or the whole of the alkali used from the aqueous dispersion.

The invention provides an optical glass having the desired high transmission ratio and high chromatic dispersion and capable of reducing the concavo-convex and fuzzy of the surface, and an optical element. The optical glass, based on the total mass of the glass calculated relative to the oxides, comprises 5.0 to 40.0 % by weight of P2O5, 10.0 to 60.0 % by weight of Bb2O5 and 5.0 to 45.0 % by weight of TiO2, and, based on the weight of oxides beside Sb2O3, comprises less than 1.0 % by weight of Sb2O3. Moreover, the optical element takes the optical glass as a base material.

The invention discloses an optical glass. The contents of the components in the optical glass are represented in percentage by weight, the optical glass consists of 15 to 35 percent of P2O5, 1 to 18 percent of Na2O plus K2O, 10 to 25 percent of TiO2 and 38 to 52 percent of Nb2O5, and moreover, the range of Nb2O5/(K2O plus Na2O) is between 2.0 and 10.0. The invention further discloses an optical perform made of the optical glass, an optical element made of the optical glass or the optical perform and an optical instrument comprising the optical glass or the optical element. While having high refractivity and high chromatic dispersion, the optical glass disclosed by the invention further has excellent chemical stability and air bubble degree.

The invention relates to an optical phase retarder for measuring the length of the ocular axis. The optical phase retarder comprises a fixed first right-angle prism and two movable right-angle prisms. The second right-angle prism and the third right-angle prism are stacked vertically and located on a transverse movement platform. The transverse movement platform is driven by a motor to move, and therefore the second right-angle prism and the third right-angle prism move synchronously. The hypotenuses of the three right-angle prisms have the same angle, thereby being in fit on a straight line. Light ray of a light source achieves incidence and penetrating through the right-angle edge of the second right-angle prism or the third right-angle prism, reaches the right-angle edge of the first right-angle prism in a vertical incidence mode through the hypotenuse of the first right-angle prism, is reflected through a high-reflection film plated on the hypotenuse of the first right-angle prism and returns back in the same way, the light source is not moved, the transverse movement platform moves, and the light ray reaches the two right-angle prisms in an incidence mode to produce the distance difference so as to achieve phase delay. Linear scanning is achieved, no aberration is introduced, the structure is simple, the cost is low, and whole-eye scanning of the anterior segment and the posterior segment of the eye is achieved.

Provided are an electrode binder composition that provides an electrode that exhibits high durability even when an active material that shows a large volume change is used, a power storage device electrode produced using the electrode binder composition, and a power storage device including the power storage device electrode. An electrode binder composition contains (A) one or more polymers selected from the group consisting of fluoropolymers, butadiene polymers, and thermoplastic elastomers, (B) a fibrous nanocarbon material having an average fiber diameter of 0.5 nm or more and 20 nm or less and a fiber length of 0.5 μm or more and 1 mm or less, (C) a cellulose material, (D) a nanocellulose fiber, and (E) water. The mass ratio between (A) and (B) is (A)/(B)=60/40 to 98/2.

The invention provides optical glass with a high refractive index, high dispersion, small relative partial dispersion Pg,F, high transmittance and good chemical stability, and an optical element. The negative ion of the optical glass is O <2->; and the positive ions of the optical glass comprise, by weight, 12 to 25% of Si<4+>, 58 to 75% of Nb<5+>, W<6+> and Zr<4+>, 8 to 25% of Li<+>, Na<+> and K<+>, and 10% or less Ba<2+>. Through reasonable design of the above components, the optical glass has a refractive index of 1.81 to 1.89 and an Abbe number of 20 to 29, the Pg,F of the optical glass is in a range of 0.5956 to 0.6199, and when the transmittance of the optical glass reaches 70%, a corresponding wavelength lambda70 is below 450 nm; so the optical glass is applicable to high-quality optical elements.

The invention provides a carrier-free high-gloss oil black color master batch as well as a preparation method and application thereof. The raw materials comprise the following components in parts by weight: 35-50 parts of carbon black, 30-45 parts of dye, 15-25 parts of a dispersing agent and 1-5 parts of an antioxidant. The preparation method disclosed by the invention eliminates adverse effects caused by carrier resin, so that the product is good in dispersity, high in color fastness and excellent in coloring effect, is high in luminosity, free of marks on the surface, free of hard spots and oil black in color after application.

The invention discloses high-uniformity optical glass and a preparation method, and relates to the technical field of optical glass, the optical glass has the characteristics of optimal opaqueness, optimal whiteness, optimal brightness and the like, has strong adhesive force, is not easy to generate chemical change, has a very high melting point, also has a relatively good ultraviolet shielding effect, and can be used for preparing optical glass. The boric acid can improve the heat resistance and transparency of the optical glass, improve the mechanical strength and shorten the melting time, and the optical glass is excellent in performance, has the characteristics of high refractive index and high dispersion, has stable optical properties and high optical uniformity, and has the advantages of high temperature resistance, low expansion coefficient, high mechanical strength, good chemical performance and the like; the optical glass is excellent in devitrification performance, devitrification resistance, chemical stability and mechanical performance and high in transmittance, the chromatic aberration of an optical system is improved, the preparation method of the optical glass is simple and easy to implement, and batch production is easy to achieve.

The invention provides a wavelength-adjustable all-fiber nanosecond pulse laser device based on a photonic crystal fiber and a system. The laser device comprises a pump light input unit, an isolator,a wavelength tuning unit, a high-nonlinearity optical fiber and a laser output unit which are sequentially connected through optical fibers, wherein the pump light input unit is connected with the laser output unit through the optical fiber, the pump light input unit is further connected with an external pump light source and is used for obtaining the pump light, coupling the pump light and then obtaining signal light, the isolator is used for ensuring laser operation unidirectionality, the wavelength tuning unit comprises a first polarization controller, a photonic crystal fiber and a secondpolarization controller which are sequentially connected through the optical fibers, the high-nonlinearity optical fiber is used for improving nonlinearity and dispersion of the signal light, and thelaser output unit is used for obtaining and outputting ultrafast pulse laser based on the signal light. The laser device is simple in structure, small in size and suitable for various application occasions such as communication.