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.

A LED lighting lamp tube comprises a transparent tube body, lamp caps, electrode pins, pedestals mounted at the connection position of the transparent tube body and the lamp caps, a power supply converter located adjacent to the lamp caps and inside the tube body, a PCB and a plurality of LED mounted on the PCB. These LED are connected in parallel or in series, and a light-scattering plate may be disposed over these LED. A plurality of LED chips can be directly mounted on the light-scattering plate. The lamp caps and the electrode pins possess the same international standards as common lamp tubes.

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.

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 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.

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.