141results about How to "Total length" patented technology

An aligned double-walled carbon nanotube bulk structure composed of plural aligned double-walled carbon nanotubes and having a height of 0.1 μm or more and a double-walled carbon nanotube are produced by chemically vapor depositing (CVD) a carbon nanotube in the presence of a metal catalyst with controlled particle size and thickness, preferably in the presence of moisture. According to this, it is possible to provide a double-walled nanotube which is free from inclusion of the catalyst, has high purity, is easy to control the alignment and growth, is able to achieve the fabrication through the formation of a bulk structure and has excellent electron emission characteristic (particularly, a double-walled carbon nanotube bulk structure) and also to provide a production technology thereof.

The present invention relates to a membrane electrode assembly. The proton exchange membrane includes two opposite surfaces. The two electrodes are separately disposed on the two opposite surfaces of the proton exchange membrane. The two electrodes are separately disposed on two opposite surfaces of the proton exchange membrane. Further, each electrode includes a catalyst layer and a gas diffusion layer. The catalyst layer is configured for being sandwiched between the gas diffusion layer and the proton exchange membrane. The gas diffusion layer includes a carbon nanotube film. The carbon nanotube film includes a plurality of carbon nanotubes, which are selected from the group consisting of the carbon nanotubes isotropically arranged, arranged along a fixed direction, or arranged along different directions. And a method for making the membrane electrode assembly is also included.

The invention relates to an uncooled double-field-of-view infrared optical system and belongs to the technical field of optics. A first positive meniscus lens, a second double-concave negative lens, a diaphragm, a third double-convex positive lens, a fourth double-convex positive lens, a fifth negative meniscus lens and a detector are coaxially arranged from an object space to an image space, wherein the second double-concave negative lens can axially move between the first lens and the diaphragm to form a narrow-field-of-view light path and a wide-field-of-view light path respectively. The system is provided with two optical fields of view, namely a wide field of view and a narrow field of view, wherein the wide field of view is used for target detection, and the narrow field of view is used for target identification; due to an aspheric design, the double-field-of-view optical system has higher degree of freedom, alternative variables for optimization design are increased, and an optical aberration design is easy to obtain high image quality; and because transformation and focusing compensation of the two fields of view are realized due to movement of the same lens, movement mechanisms in the system are reduced, the rest components in the light path are fixed parts which are easy to assemble and debug, and the assembling and debugging difficulty of the system is reduced greatly.

An apparatus for forming a test chamber within a tubular and internally pressure testing the tubular with a test gas. The apparatus is comprised of a generally cylindrical tester body having first and second spaced-apart sealing assemblies that are expandable against the inner wall of the tubular by a piston assembly so as to form a test chamber defined by the inner wall of the tubular and the expanded seal assemblies. The pistons of the first sealing assembly are gas actuated pistons acting in cooperation with the seals of the first sealing assembly in response to a gas under pressure. The pistons of the second sealing assembly are fluid actuated pistons acting in cooperation with the seals of the second sealing assembly in response to a fluid under pressure. The pressure of the gas and the pressure of the fluid used to actuate the first and second pistons are controlled independently of each other. The gas used to activate the first set of pistons is directed to the test chamber to serve as a test gas. The apparatus includes a sleeve container for retaining gas escaping from the test chamber to the exterior of the tubular. The sleeve container is provided with a gas detector for detecting the presence of test gas in the sleeve and a signal transmitter for generating signals indicating the presence of absence of test gas in the sleeve container. The preferred pressurized gas is helium and the preferred pressurized fluid is water.

In one embodiment, the invention provides methods for predicting a clinical outcome of a patient's neoplastic disease comprising: (a) determining a predictor value algorithmically using patient sample values for (1) at least one tumor marker or at least one immune marker, and (2) at least one marker that is (i) an extracellular matrix (ECM) marker (ii) a marker that is indicative of extracellular matrix synthesis (fibrogenesis), or (iii) a marker that is indicative of extracellular matrix degradation (fibrolysis); and (b) predicting the clinical outcome of the neoplastic disease by evaluating the predictor value.

The invention provides an objective lens of an endoscope, which comprises a front lens system and a back lens system; an aperture diaphragm is arranged between the front lens system and the back lens system; and the ratio of the focal distance of the front lens system to the focal distance of the back lens system is between 0.1 and 2.0. Compared with the prior objective lens of the endoscope, the objective lens of the endoscope effectively controls a distance from an object near plane to the aperture diaphragm and a distance from the aperture diaphragm to an imaging plane through the focal distance ratio of the front and back lens systems; a second lens system in the front lens system can correct most of coma and ratio chromatism generated by a first lens system, and a third lens system in the back lens system can further correct the coma and the ratio chromatism generated by the first lens system; simultaneously, an infrared light filter is arranged between the aperture diaphragm and the third lens system; therefore, the objective lens of the endoscope has the characteristics of short total length, good color restoration, big angle of view, small external diameter and the like to achieve the aim of the invention.

A control device for a tattoo machine, and a tattoo system. The control device adapted to control reciprocation of a needle assembly of the tattoo machine using a pulsed signal. A duty cycle of the pulsed signal controlling a stroke length of the needle assembly. A frequency of the pulsed signal controlling a stroke frequency of the needle assembly. Duty cycle and frequency may be controlled independently of one another.

The invention discloses an image lens which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in order from the object side to the image side. The firstlens has negative refractive power. The third lens has positive refractive power. The fourth lens has positive refractive power. The fifth lens has negative refractive power, and the surface of the image side is a concave surface near the optical axis. Both the object side surface and the image side surface are aspherical. The image side surface of the sixth lens is a concave surface near the optical axis, and the image side surface has at least one inflection point at the off axis. Both the object side surface and the image side surface are aspherical. The total number of lenses of the imagelens is six. The lenses of the image lens are single and non-adhesive lenses. When a specific condition is satisfied, the image lens can satisfy the requirements of large view angle, high imaging quality and miniaturization at the same time.

The invention belongs to the technical field of microimaging, in particular to a lighting path of a plate lighting microscope and provides a lighting system of a plate lighting microscope with variable thickness and length of a plate. The system successively comprises a laser light source, a four-component mechanical compensation afocal zooming beam expanding system of a full spherical mirror, a cylindrical lens and a microobjective arranged along the optical axis from the object side to the image side; light emitted by the laser light source changes in aperture of a laser beam by means of theafocal zooming beam expanding system and then passes through the cylindrical lens rotating at 90 degrees by taking the optical axis as the rotating axis to form the plate light. The plate light undergoes subduction of spherical aberration generated by the afocal zooming beam expanding system and the cylindrical lens through a spherical aberration subduction microobjective, and the light intensityof the whole plate is more uniform; the plate lighting microscope can be used for observing biological samples in a certain dimensional range under the circumstance of not replacing the plate lighting system.

The present invention relates to a UV irradiation assisted method of surface modification, which comprises: introducing a functional group L onto the surface of a polymer material P through the photochemical reaction of a photosensitive group X under UV irradiation, wherein the photosensitive group X comprises at least one xanthone unit.

The invention relates to a zooming system and provides a compact medium wave infrared continuous zooming system, aiming to overcome defects that existing refrigerating medium wave infrared continuouszooming system is long and is heavy. The zooming system comprises a front fixed group, a zoom group, a compensation group, a middle fixed group, a focusing group and a rear fixed group that are arranged coaxially in sequence along an optical axis direction from left to right, wherein the left side of the front fixed group is an object side, the right side of the rear fixed group is an image side,the front fixed group consists of a first lens, the zoom group consists of a second lens, the compensation group consists of two lenses, that is, a third lens and a fourth lens from left to right in sequence, the middle fixed group consists of a fifth lens, the focusing group consists of a sixth lens, the rear fixed group consists of two lenses, that is, a seventh lens and an eighth lens from leftto right in sequence, the zoom group and the compensation group can move toward each other or in an opposite direction along the optical axis, the zoom group is used for changing the focal length continuously, and the compensation group is used for compensating image side movement caused by change of focal length.

The invention relates to a rear bumper protective device containing (i) a base layer of hanging flexible material having a top portion, side portions, and a bottom portion, and having a construction and thickness capable of reducing or preventing damage to a rear portion of a vehicle, and being of sufficient dimensions to at least partially cover a rear portion of a vehicle; and (ii) one or more stabilizing blocks protruding from the top portion of the base layer and positioned colinearly with or along a contour edge of the top portion and being of sufficient rigidity, thickness, width, and length to reduce curling of the rear bumper protective cover. The bumper protective device can include one or more securing means capable of attaching to a rear portion of a vehicle.

The invention discloses an optical lens and an imaging device. The optical lens sequentially comprises a first lens, a diaphragm, a second lens, a third lens and an optical filter from an object sideto an imaging surface along an optical axis, the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface or a convex surface; the second lens has positive focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convexsurface; the third lens has negative focal power, the object side surface of the third lens is a convex surface, the image side surface of the third lens is a concave surface near the optical axis, and the image side surface of the third lens has at least one inflection point; wherein the first lens, the second lens and the third lens are all plastic aspheric lenses. The optical lens provided bythe invention has the characteristics of wide viewing angle, large aperture, small distortion and high imaging quality, and is more suitable for the design requirements of the DToF technology.

The invention relates to an f6mm all-pass day and night full-color high-definition fixed-focus lens, which is characterized in that in an optical system of the lens, a front lens group A with the negative focal power, a diaphragm and a back lens group B with the positive focal power are sequentially arranged in the incidence direction of light rays from the front side to the back side; the front lens group A comprises a biconcave lens A-1, a negative crescent lens A-2 and a biconvex lens A-3 in sequential arrangement front the front side to the back side; the back lens group B comprises a biconvex lens B-1, a biconcave lens B-2, a biconvex lens B-3 and a gluing group in sequential arrangement from the front side to the back side; the gluing group is sealed, connected and bonded with a biconvex lens B-4 and a negative crescent lens B-5. The lens provided by the invention can still be used normally in high-low-temperature environment; the resolution is high; the high-quality color imaging can be realized in low-illumination and night environment; the total length of the light path is short; the structure is compact; the light passing caliber is in the full light passing state; the light inlet quantity is sufficient; the matching with high-resolution CCD (charge coupled device) or CMOS (complementary metal-oxide-semiconductor transistor) being 3-million pixels or higher can be realized.

The invention discloses a fish-eye lens, from the object side to the imaging side in sequence, comprising a first lens having a negative power and being a meniscus spherical lens with the concave surface facing the imaging side; a second lens having a negative power and being a meniscus aspherical lens with the concave surface facing the object side; a third lens having a positive power and beinga double convex spherical lens; a fourth lens having a positive power and being a double convex spherical lens; a fifth lens having a negative power and being a meniscus spherical lens with the concave surface facing the object side; and a sixth lens having a positive power and being a meniscus aspherical lens with the concave surface facing the imaging side or being a double convex aspherical lens, wherein the fourth lens and the fifth lens form a gluing lens. The fish-eye lens has the advantages of short total length, large image surface, wide angle, good day and night confocal performance and good imaging qulity.

Vessel protection device protects a floating vessel from rubbing against pilings or a stationary dock and eliminates the need for hanging or fixed vessel fenders. A fixed attachment may secure the protection device to a dock, for example, and be configured for supporting spring-loaded solid or air-filled rollers. It may be permanent and spaced in a manner so as to stand off a floating vessel while tied to a stationary dock or pilings, thus allowing for vessel movement associated with vertical tidal action, current, and light wave or wave motion. The arm and roller section may also be rotatable from a vertical to a horizontal position, thus allowing for an untied vessel to move freely along the rollers oriented in their horizontal position while the vessel is either departing or docking, and oriented vertically, such as when the vessel is docked.

The invention concerns a multiple-extruder configuration in which two co-rotating twin-screw extruders and a counter-rotating twin screw extruder are connected to each other with respect to the flow of material.