## Selected papers on electron optics |

### From inside the book

Results 1-3 of 40

Page 24

No conclusions concerning the conditions usually found in electron microscopes

can therefore be drawn from Busch's formula (42). 6 This also applies to the

technical dimensioning formulae derived from it,7 as was shown experimentally

by Ruska.8 5. Image

magnetic field is

integration here has to be extended from the object position Zq to the image

position z ...

No conclusions concerning the conditions usually found in electron microscopes

can therefore be drawn from Busch's formula (42). 6 This also applies to the

technical dimensioning formulae derived from it,7 as was shown experimentally

by Ruska.8 5. Image

**Rotation**As is well known, the Gaussian image formed by amagnetic field is

**rotated**through an angle *-h-iu\*** (45) relative to the object. Theintegration here has to be extended from the object position Zq to the image

position z ...

Page 320

(17) Since the multiplication of a complex number by e'* corresponds to

of the corresponding radius vector through this angle \p we will change over to a

new radius vector w(z) by means of the substitution v = e1' •' w (z) mit = — — U8)

This new radius vector is

angular velocity" of this

to say, according to Eq. (15), eliminated the

(17) Since the multiplication of a complex number by e'* corresponds to

**rotation**of the corresponding radius vector through this angle \p we will change over to a

new radius vector w(z) by means of the substitution v = e1' •' w (z) mit = — — U8)

This new radius vector is

**rotated**through an angle -\p (Ref. 1) relative to v. The "angular velocity" of this

**rotation**is specified by Eq. (18). In this way, we have, soto say, according to Eq. (15), eliminated the

**rotation**due to the magnetic field, ...Page 383

Leningrad Physical-Technical Institute. Received Academy of Sciences of the

USSR. 25. XI. 1942. * It is easy to obtain this relation from eq. (3) if we take into

consideration the fact that for a

passes through point O and is formed by the intersection of the surface, caused

by the

with a plane perpendicular to this axis. Reprinted from Comptes Rendus [

Doklady] de ...

Leningrad Physical-Technical Institute. Received Academy of Sciences of the

USSR. 25. XI. 1942. * It is easy to obtain this relation from eq. (3) if we take into

consideration the fact that for a

**rotation**field f is constant on the circle, whichpasses through point O and is formed by the intersection of the surface, caused

by the

**rotation**of the investigated trajectory about the axis of symmetry of the fieldwith a plane perpendicular to this axis. Reprinted from Comptes Rendus [

Doklady] de ...

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Common terms and phrases

aberration coefficients amplitude angle aperture approximation astigmatism atoms axial Boersch calculated cathode cathode-ray tube characteristic function chromatic aberration coherent coil constant contrast correction corresponding curve deflection density diameter diffraction distance distribution effect electron beam electron gun electron lenses electron optics electrostatic Elektronen emission energy equation expression figure filament first-order focal length focusing formula Fourier transform fringes function Gaussian given Hanszen hologram illumination image plane integral lentille limit Linse Linsen magnetic field magnetic lens magnification maximum method micrograph object plane objective lens obtained optic axis Optik parameters paraxial particles perturbation phase shift Phys Physics pole pieces position possible potential principal curve radius reconstruction resolution resolving power rotation scanning electron microscope scanning microscope scattering Scherzer screen shown in Fig solution specimen spherical aberration structure superconducting surface symmetry third-order tion trajectory tube variation vector voltage wave zero