U.S. Philips Corporation

Koninklijke Philips Corporation N.v.

Fei Comapny

Tjerk G Spanjer

Gerardus A Vrijssen

Nicolaas G Vink

Peter Christiaan Tiemeijer

Maarten Bischoff

Albertus Aemilius Seyno Sluyterman

Stan Johan Pieter Konings

Gerardus J Hellings

Willem M Van Alphen

Erich E Himmelbauer

Antonius W Van Der Heijden

Lambert J Stil

Albertus A S Sluyterman

Jeroen Van Engelshoven

Wilhelmus Henrica Cornelis Theuws

Johannes H Bohlander

Leopold C M Beirens

Abraham A Los

Antonius J Pennings

Michel Cornelis Josephus Marie Vissenberg

Pim Theo Tuyls

Albertus A Sluyterman

Evert Seevinck

Antonius Henricus Van Tiel

Ger-Wim J Goorhuis

Willibrordus Aja Van Der Poel

Leopold Cyrille Maria Beirens

Johannes Maria Maassen

A method for reducing throughput time in a sample image acquisition session in transmission electron microscopy comprises: providing an electron microscope comprising a sample component, a beam generator, an adjusting component, and a filtering component; securing a sample by using the sample component; generating an electron beam by using the beam generator; generating an image beam by directing the beam to the sample component; adjusting at least one of the beam and the image beam by using the adjusting component to obtain at least one modified image beam, wherein the adjusting is performed in such a way, that off-axial aberration of the modified image beam is minimized; and filtering the modified image beam via the filtering component to reduce resolution-deteriorating effect of chromatic aberration on the modified image beam resulting from the adjusting of the at least one of the beam and the image beam.

Method, device and system for reducing off-axial aberration in electron microscopy

A method for electron microscopy comprises: adjusting at least one of an electron beam and an image beam in such a way that off-axial aberrations inflicted on at least one of the electron beam and the image beam are minimized, the adjusting performed by using a beam adjusting component to obtain at least one modified image beam, wherein the adjusting comprises applying both shifting and tilting to at least one of the electron beam and the image beam and wherein the amount of tilting of at least one of the electron beam and the image beam depends on the amount of shifting of at least one of the electron beam and the image beam respectively and wherein the amount of tilting is computed based on at least one of coma and astigmatism introduced as a consequence of the shift.

The invention relates to a method for electron microscopy. The method comprises providing an electron microscope, generating an electron beam and an image beam, adjusting one of the beam and of the beam and the image beam to reduce off-axial aberrations and correcting a diffraction pattern of the resulting modified beam. The invention also relates to a method for reducing throughput time in a sample image acquisition session in transmission electron microscopy. The method comprises providing an electron microscope, generating a beam and an image beam, adjusting one of the two to reduce off-axial aberrations and filtering the resulting modified image beam. The invention further relates to an electron microscope and to a non-transient computer-readable medium with a computer program for carrying out the methods.

The invention relates to a deflection unit for cathode ray tubes in which the energy for deflection is reduced. This is done by providing a magnetic material between frame coils and line coils of the deflection unit. In an advantageous embodiment of the invention, first void spaces as well as second void spaces between the frame coils and a yoke ring and/or third void spaces between wire strands of the frame coils are filled. A deflection energy reduction of up to 30% can be obtained.

Deflection unit for a cathode ray tube

The invention relates to a color display device comprising an in-line electron gun ( ) for generating three electron beams ( ), and a convergence unit ( &prime;) to dynamically influence the convergence of the electron beams and deflecting means ( ) for deflecting the electron beams ( ). The convergence unit ( &prime;) comprises a ring-shaped element ( &prime;), said ring-shaped element comprising two parts, a first part ( ) being positioned closer to the in-line gun ( ) than a second part ( ), and the first and/or the second part having four coils ( &prime;) for generating a magnetic quadrupole field.

Color display device having quadrupole convergence coils

A color display device having an in-line electron gun ( ) for generating three electron beams ( ), and a convergence unit ( &prime;) to dynamically influence the convergence of the electron beams, preferably to decrease a distance (p) between the electron beams. The convergence unit ( &prime;) includes a ring-shaped element ( &prime;) having coils ( &prime;) formed by electrically conductive wires, which have been toroidally wound in a winding direction and according to a winding density distribution N (&phgr;) given by N (&phgr;)&equals;N cos ( &phgr;)&plus;C where &phgr; is an angle enclosed by the X-direction and a line between an element of the coil and the center, which ranges between 0&deg; and 360&deg;, N is a given winding density, the sign of N (&phgr;) denotes the winding direction, and C is a constant different from zero, and preferably equal to &minus;N .

The invention relates to a color display device comprising an in-line electron gun ( ) for generating three electron beams ( ), and a convergence unit ( &prime;) to dynamically influence the convergence of the electron beams, preferably to decrease a distance (p) between the electron beams. The convergence unit ( &prime;) comprises a ring-shaped element ( &prime;) having four coils ( &prime;). The coils ( &prime;) comprise electrically conductive wires, which have been toroidally wound in a winding direction and according to a winding density distribution N (&phgr;) given by N (&phgr;)&equals;N cos (2&phgr;). Here &phgr; is an angle enclosed by the X-direction and a line between an element of the coil and the center, which ranges between 0&deg; and 360&deg;, N is the winding density at &phgr; equal to 0&deg;, and the sign of N &phgr; denotes the winding direction.

The invention relates to a color display device comprising an in-line electron gun ( ) for generating three electron beams ( ), and a convergence unit ( ) to dynamically influence the convergence of the electron beams, preferably to decrease a distance (p) between the electron beams. The convergence unit ( ) comprises a ring-shaped element ( ) having four coils ( ) and a longitudinal axis ( ). A cross-section of the ring-shaped element ( ) with a plane perpendicular to the longitudinal axis ( ) is a circle with the longitudinal axis as its center and the ring-shaped element ( ) forming the circumference. Each coil extends over the circumference over an angle &phgr; having a value between &deg; and

To prevent breakdown of an insulating layer located underneath a gate electrode, the gate electrode is connected to an external terminal via a high-ohmic resistor. The high-ohmic resistor may form part of a resistive network for biasing voltages for a plurality of gate electrodes. The resistive network may be realised partly on the insulating layer.

Cathode ray tube comprising a semiconductor cathode

An in-line electron gun includes main lens electrodes, a common aperture and, at a distance from the common aperture, three in-line apertures in a plate-shaped part. The outer apertures extend, viewed in a direction transverse to the plate-shaped part, beyond the common aperture.

Color cathode ray tube comprising an in-line electron gun with extended

A color cathode ray tube includes an in-line electron gun having a main lens with recessed apertures. The main lens is formed by two electrodes. These electrodes have outer edges and recessed apertures which allow passage of three in-line electron beams and which are arranged at a distance d1 and d2, respectively, from the outer edges. The outermost apertures are asymmetric. The difference d1-d2 and the asymmetry of the outermost apertures is such that both the beam displacement and the core haze asymmetry are minimal.

Color cathode ray tube having an in-line electron gun with asymmetrical

A display device with a DAF-gun (Dynamic Astigmatism and Focusing) in which the first focusing electrode (G3a) has at the side facing the pre-focusing part of the electron gun three elongated apertures (36, 37, 38). Hereby in operation in the vicinity of the elongated apertures an electron-optical field is generated between the pre-focusing part of the electron gun and the elongated apertures for reduction of the vertical dimension (vertical meaning transverse to the plane of the electron beams) of the beam size of the electron beams in the main lens. This reduction of the electron beam size results in an increase of the vertical dimension of the beam spot on the screen. This reduces Moire effects.

Display device and colour cathode ray tube for use in a display device

The display system comprises a colour cathode ray tube. The colour cathode ray tube comprises an in-line electron gun with a distributed main lens (DML). The final electrode (anode) of the DML generates a quadrupole lens field. To a first electrode a static voltage V.sub.foc is applied. Between a second electrode, on which a dynamic voltage V.sub.dyn is applied, and a first intermediate electrode a quadrupole electric field is generated. The value of the dynamic voltage is lower than the static voltage.

Color cathode ray tube display system

A cathode ray tube in which the pre-focusing field, the main lens field, a quadripolar field in the pre-focusing portion of the electron gun and a quadripolar field in the main lens are dynamically varied by means of only one dynamic voltage.

Display device and cathode ray tube

Picture display device comprising a display tube with an electron gun having a hollow tubular structure with an inner surface on which a resistance structure of a material having a high electrical resistance is provided, which structure constitutes a focusing lens. The resistance structure is connected to at least two axially spaced electric contacts for connecting an anode voltage and at least one electric contact located in between for applying a focusing voltage. An electrode means of low-ohmic material for controlling the focusing lens by means of a dynamic correction signal is arranged in the region of the connection for the focusing voltage. Upon energization, the low-ohmic electrode means particularly exercises a non-rotationally symmetrical effect on the electron beam.

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Eindhoven, Netherlands

Tjerk G Spanjer