40results about How to "Small focus" patented technology

An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure-containing material having an emitted electron current density of at least 4 A / cm2. High energy conversion efficiency and compact design are achieved due to easy focusing of cold cathode emitted electrons and dramatic reduction of heating at the anode. In addition, by pulsing the field between the cathode and the gate or anode and focusing the electron beams at different anode materials, pulsed x-ray radiation with varying energy can be generated from a single device. Methods and apparatus for independent control of electron emission current and x-ray energy in x-ray tubes are also provided. The independent control can be accomplished by adjusting the distance between the cathode and anode. The independent control can also be accomplished by adjusting the temperature of the cathode. The independent control can also be accomplished by optical excitation of the cathode. The cathode can include field emissive materials such as carbon nanotubes.

The invention relates to an x-ray anode and a process for its manufacture. The x-ray anode is characterized in that the anode material is embodied as a layer on a diamond window. The x-ray anode is preferably used with x-ray units which require as selective as possible x-radiation production to achieve as high as possible radiation intensity. Use in x-ray microscopes in which a high radiation intensity guarantees the highest resolutions is particularly preferred.

An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure-containing material having an emitted electron current density of at least 4 A / cm2. High energy conversion efficiency and compact design are achieved due to easy focusing of cold cathode emitted electrons and dramatic reduction of heating at the anode. In addition, by pulsing the field between the cathode and the gate or anode and focusing the electron beams at different anode materials, pulsed x-ray radiation with varying energy can be generated from a single device.

A multimodal probe system for spectroscopic scanning of tissue for disease diagnosis. The system can use diffuse reflectance spectroscopy, fluorescence spectroscopy and Raman spectroscopy for the detection of cancerous tissue, such as tissue margin assessment.

An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure-containing material having an emitted electron current density of at least 4 A / cm2. High energy conversion efficiency and compact design are achieved due to easy focusing of cold cathode emitted electrons and dramatic reduction of heating at the anode. In addition, by pulsing the field between the cathode and the gate or anode and focusing the electron beams at different anode materials, pulsed x-ray radiation with varying energy can be generated from a single device. Methods and apparatus for independent control of electron emission current and x-ray energy in x-ray tubes are also provided. The independent control can be accomplished by adjusting the distance between the cathode and anode. The independent control can also be accomplished by adjusting the temperature of the cathode. The independent control can also be accomplished by optical excitation of the cathode. The cathode can include field emissive materials such as carbon nanotubes.

The present invention discloses an optical measurement and / or inspection device that, in one application, may be used for inspection of semiconductor devices. A method is disclosed for extracting information of a device-under-test for an ellipsometer, comprising the steps: providing a plurality of incoming polarized beams using a plurality of polarizers, where each of the beams being polarized at a designated polarizing angle; using a parabolic reflector to focus said plurality of incoming polarized beams on a spot on a DUT; using a parabolic reflector to collect a plurality of beams reflected from said DUT; and analyzing said collected beams using a plurality of analyzers, wherein each of the analyzers having a designated polarizing angle with respect to its respective polarizer.

A device for generation of x-ray radiation has one or more cold electron sources as a cathode and at least one x-ray target as an anode that are arranged in an evacuable housing. Upon application of an electrical voltage between cathode and anode, electrons emitted from the electron source are accelerated in an electron beam onto the x-ray target. A device for reduction of the proportion of positive ions in the region of the electron source is arranged between the electron source and the x-ray target in the housing. The device exhibits a long lifespan with good focusing capability and fast modulation capability of the electron beam.

A semiconductor laser device with the energy density increased at the focal point and a LD pumped solid-state laser device configured of the particular semiconductor laser device are provided. A stack array laser element for radiating a two-dimensional array of laser beams includes a plurality of parallel laser beam columns each aligned in the form of dotted lines. In front of the stack array laser element; each laser beam column collimated by being refracted in the direction substantially perpendicular to the direction of the dotted line is received, and radiated by turning at right angles to the direction of the laser beams from each emitter or emitter group. In this way, the laser beams are converted into a plurality of substantially ladder-shaped parallel laser beam columns. These parallel laser beam columns are compressed to form parallel laser beam columns in alignment. Each compressed one of parallel laser beam columns is turned at right angles and radiated. Thus, all the laser beams are converted into a plurality of aligned parallel laser beams, which are collimated and condensed at a focal point.

A method for providing an intensity or brightness measurement using a digital image-capturing device comprising: selecting a target area within a field of view of the image-capturing device, the target area containing pixels; measuring the intensity or brightness of pixels in a target area; accumulating the intensity or brightness values of the pixels in the target area; and determining a pixel value representative of the intensity or brightness of the pixels in the target area. A device for making color measurements comprising an image-capture device, a processor or logic device, and a memory location for accumulating color data, and the processor or logic device is programmed to perform color measurements by accumulating the data for pixels located in the target area in memory, and determining a representative color value.

A system for non-contact measurement of thickness of a test object. A laser beam is split into two identical directly opposed input beams. A calibration object of known thickness causes beams to be reflected from sides of the test object. Each reflected beam passes through sensing means including a pinhole aperture and a photodiode sensor. Maximum sensor output defines first and second focal points a known distance apart. The calibration object is removed, and the test object is inserted into the path of the input beams, creating focus position intensity curves for the reflected beams. By determining the deviation, at maximum photodiode output, of the positions of the test object reflecting surfaces from the positions of the calibration object surfaces, the test object thickness can be readily and accurately determined.

A method for providing an intensity or brightness measurement using a digital image-capturing device comprising: selecting a target area within a field of view of the image-capturing device, the target area containing pixels; determining the brightness of pixels in the target area; accumulating the brightness values of the pixels in the target area; and determining a pixel value representative of the pixels in the target area. A device for making color measurements comprising an image-capture device, a processor or logic device, and a memory location for accumulating color data, and the processor or logic device is programmed to perform color measurements by accumulating the data for pixels located in the target area in memory, and determining a representative color value.

Provided is a zoom lens including: a lens unit Ln1 having a negative refractive power; a lens unit Ln2 having a negative refractive power; a lens unit Lp1 having a positive refractive power; and a rear lens group including one or more lens units, the lens unit Ln1, the lens unit Ln2, the lens unit Lp1, and the rear lens group being successively arranged in order from an object side to an image side, in which the lens unit Ln1 and the lens unit Lp1 are moved along the same locus during zooming, and in which the lens unit Ln2 is moved toward the object side during focusing from infinity to proximity.

The present invention provides a method of depositing an analyte of interest on a hydrophobic surface, e.g., DIOS-MS substrates, by desolvating organic solvents from the aqueous analyte solution prior to deposition.

A method for providing an intensity or brightness measurement using a digital image-capturing device comprising: selecting a target area within a field of view of the image-capturing device, the target area containing pixels; determining the brightness of pixels in the target area; accumulating the brightness values of the pixels in the target area; and determining a pixel value representative of the pixels in the target area. A device for making color measurements comprising an image-capture device, a processor or logic device, and a memory location for accumulating color data, and the processor or logic device is programmed to perform color measurements by accumulating the data for pixels located in the target area in memory, and determining a representative color value.

Methods for administering preventative healthcare measures to a patient population are disclosed. A patient population eligible to receive certain healthcare benefits is defined and thereafter multiple sources of healthcare data are compiled and analyzed to create health profiles for each individual. An objective set of criteria for providing preventative care is provided to eligible members within the patient population and appropriate healthcare is administered to the degree necessary to make sure a sufficient percentage of the population receives adequate healthcare treatment consistent with the recognized, objective healthcare standards. Patients remaining non-compliant are sought for further administration of healthcare until requisite compliance standards are met.

A system for non-contact measurement of thickness of an object. A laser beam is split into two identical input beams that are directly opposed. A calibration object of known thickness causes beams to be reflected from sides of the test object. Each reflected beam passes through auto-focus means including a quad sensor coupled to focussing means on the input beam, causing each input beam to be focussed on the calibration object, thereby defining first and second focal points a known distance apart. The focus is locked and focus error data are generated for each beam. The calibration object is removed, and the test object is inserted into the path of the focussed input beams, creating focus error signals for the reflected beams. By determining the deviation of the positions of the test object reflecting surfaces from the positions of the calibration object surfaces, the test object thickness can be readily and accurately determined.

The invention is suitable for the technical field of focused ultrasound, and discloses a composite physical focused energy converter and a manufacturing method thereof. The energy converter comprisesa housing and a plurality of composite energy conversion units; a plurality of through holes are formed in the front end of the housing; the composite energy conversion units are arranged in the through holes in an inserting manner; the axes of the multiple composite energy conversion units are directed to the same point; and the composite energy conversion units are connected with electrode leads. The manufacturing method is used for manufacturing the previous composite physical focused energy converter. With the adoption of the composite physical focused energy converter and the manufacturing method thereof, the various composite energy conversion units are not required to be subjected to compression forming, so that the situation that a small energy converter is easy to fracture in thepressing process is avoided, the requirements that the weight is low, the size is small, focused focal points are small, and the composite physical focused energy converter is head-mounted are met under the condition that the energy is equivalent, the composite physical focused energy converter is applied to a research of ultrasound stimulation on mouse behaviors, movement behaviors of a mouse arenot affected by the energy converter in the stimulation process, and it is guaranteed that the research is carried out scientifically and advantageously.

The imaging lens consists of, in order from the object side, a positive first lens group that moves to the object side during focusing from a long distance to a short distance, and a second lens group that does not move during focusing. The first lens group has a first-B sub-lens group. The first-B sub-lens group consists of, in order from the object side, a positive b1 lens, a negative b2 lens concave toward the image side, an aperture stop, a negative b3 lens concave toward the object side, and a positive b4 lens. The second lens group consists of, in order from the object side, a negative lens, a positive lens, and a negative lens. Predetermined conditional expressions are satisfied.

The present invention relates to a tumor surgical resection system. By utilizing an infrared spectrum detection means, infrared spectrum analysis can be performed firstly on a healthy area and a tumorarea, and an identification model is established in a host; then whether a boundary of the tumor area is the tumor area is identified according to the identification model and fluorescence labeling is also conducted; after the labeling, a laser cutting head is used for exciting fluorescence and then laser excision is conducted after the tumor area is confirmed; firstly the system can greatly improve identification accuracy of the tumor area and avoids errors of human eye identification; secondly, a focused focal point of the laser cutting head under a focusing working state is extremely small, so that cutting accuracy can be greatly improved; and the tumor area is labeled by using a fluorescent labeling mode, fluorescent identification is further conducted during cutting, the cutting accuracy is improved, labels fall off after cutting, and no influence is produced on healthy tissues.

The invention relates to a tripolar grid-controlled cold cathode X-ray tube, which comprises an anode component, a cathode component and a vacuum cavity. The anode component and the cathode componentare arranged in the vacuum cavity. The cathode part comprises a cathode and a grid mesh. The potential difference between the cathode and the grid mesh can adjust and lead out electrons to bombard ananode target of the anode part to generate X-rays. The cathode is made of a super-aligned carbon nanotube array. The tripolar grid-controlled cold cathode X-ray tube has the following beneficial effects: the super-aligned carbon nanotubes are used as a cathode material, and compared with a common array, the super-aligned carbon nanotube array of the material has the advantages that the carbon nanotubes are straighter, are arranged more orderly, have excellent field emission performance and a stable structure, are easy to control as a field emitter, and achieve a better emission effect. The getter is added into the vacuum cavity, so that a relatively high vacuum degree can be kept. An electronic focusing function is achieved through the focusing groove and the focusing electrode, and a small focus can be achieved.