33 results about "Negative element" patented technology

Systems configured to provide illumination of a specimen during inspection are provided. One system includes catoptric elements configured to direct light from a light source to a line across the specimen at an oblique angle of incidence. The catoptric elements include positive and negative elements configured such that pupil distortions of the positive and negative elements are substantially canceled. Another system includes a dioptric element and a catoptric element. The dioptric element and the catoptric element are configured to direct light from a light source to a line across the specimen at an oblique angle of incidence. The dioptric and catoptric elements are also configured such that pupil distortions of the dioptric and catoptric elements are substantially canceled.

An optical coupling device enabling spherical or hemispherical light sources to be more fully utilized by gathering more of the emitted radiation and reducing the angle of emission. The optical coupling device includes a first conic reflector having an aperture at the first conic reflector vertex; a second conic reflector coaxial with the first conic reflector and opening toward the first conic reflector; a light source positioned at the second conic reflector vertex; and a negative element located at the aperture for reducing the numerical aperture of the light emitted from the optical coupling device. The optical coupling device may include a refractive medium between the first and second conic reflectors. The present invention provides for improved efficiencies when transferring or coupling optical energy into additional optical systems, and may be used with solid state light as well as conventional sources.

A first embodiment is a lens system having a plurality of refractive and reflective spherical elements that work as a magnifier to produce a distortion free, less than 1%, image with optical correction over a wide field of view. The system has at least one concave reflecting surface, and at least three convex refracting surfaces with the sign of the radius of one of the convex refracting surfaces being opposite of the sign of the radius of remaining two convex refracting surfaces. A second embodiment is a lens having a concave reflecting element which is on a substrate that is a negative lens by transmission with an index of refraction between 1.6<nd >2.0 and a dispersion 49<νd>15. This is used in combination with at least 3 positive refracting surfaces with less dispersive power than the negative element and with the sign of the radius of one of the positive elements being opposite from the sign of the radius of the remaining positive elements.

The present invention is a method and system for deriving histograms for neighborhoods of pixels in an image that uses subtractive image regions to increase the size of overlapping regions of regions of series of adjacent image pixels to a size equal to the size of a full neighborhood. Each neighborhood (except for a central neighborhood) is viewed as a combination of the central overlapping neighborhood and one or more additional regions, at least one of which comprises a “subtractive” region, and which vary in size depending on the distance of a pixel from the pixel that is the basis for the central neighborhood. The histogram for each neighborhood is derived by adding the histograms of the central neighborhood and the histograms for the relevant additional region or regions, which may have one or more negative element values. The method and system of the invention allows the processing time for implementing a median filter to be improved to approximately the order of log(r), where r is the “radius” of the median filter being applied.

The invention discloses an automatic control method for making a line film. The automatic control method comprises the steps as follows: 1, determining all parameters and layer names when the line film is made; 2, conceiving and designing a simplified interface to form an input interface; 3, identifying and copying a set of external line layers; 4, optimizing the line layers in line copying layers to remove negative elements; 5, correspondingly compensating and expanding lines, anti-welding plates and copper sheets according to the production capacity in the line copying layers; 6, comparing with plug hole layers, removing holes required to be filled with anti-welding oil in drill layers; 7, compensating and expanding the residual holes in the drill layer, and copying to the line copying layers; 8, automatically generating a set of finished line film tools; and 9, automatically repeating the steps 3 to 8 to form another set of external line films. According to the automatic control method, the tool making time is shortened to be 1-2 min, the working efficiency is greatly improved, the steps are simple and convenient, the making time is short, and the efficiency is high.

This embodiment relates to a lithium-ion secondary battery, which is used to avoid damage to the battery due to overcharging and improve safety and reliability. Inside the battery can are built an electrode assembly formed by winding a positive electrode, a separator, and a negative electrode, and an overcharge prevention mechanism. case; a fuse body provided on the positive lead wire or the negative lead wire; and a switch part, the fuse body and the switch part are connected in series to form a short-circuit circuit of the electrode assembly, when charging When the voltage between the positive and negative electrodes becomes equal to or greater than a predetermined value, the voltage detection unit closes the switch member, thereby blowing the fuse body by energy accumulated in the electrode assembly.

A lead-acid capacitor battery includes an electrode group, a separator unit, a continuous carbon fiber weaving unit and an electrolyte; there is no adhesive between the electrode group and the continuous carbon fiber weaving unit. The electrode group includes a positive unit and a negative unit. The continuous carbon fiber weaving unit is arranged on the electrode group. The lead-acid capacitor battery of the present invention does not use carbon fiber powder, and by using continuous carbon fiber weaving, the lead-acid capacitor battery has the characteristics of continuous conduction, and no adhesive is used between the electrode group and the continuous carbon fiber weaving unit .

A lens system which compensates for various aberrations, including chromatic aberration, with an enlarged field-of-view. The lens system includes a positive element and a negative element, each positioned in an optical path of incident light. The positive element includes a first negative lens, a convex lens and a hologram optical element. The negative element includes a second negative lens.

The self-alkylation reaction of isomerized alkane includes making C4-C6 isomerized alkane as material contact with solid catalyst under self-alkylation reaction condition. It features that there is compound containing strong electric negative element in 10-8000 ppm as reaction assistant. The self-alkylation reaction process needs no addition of olefin, and the alkylated product has high branch chain degree and high octane number. No olefin in the reaction makes the catalyst less deactivated.