scholarly journals Paraxial analysis of three-component zoom lens with fixed distance between object and image points and fixed position of image-space focal point

2014 ◽  
Vol 22 (13) ◽  
pp. 15571 ◽  
Author(s):  
Antonin Miks ◽  
Jiri Novak
Keyword(s):  
Focal Point ◽  
Image Space ◽  
Zoom Lens ◽  
Fixed Position ◽  
Fixed Distance

Three-component zoom lens with fixed position of optical center

2019 ◽  
Vol 58 (14) ◽  
pp. 3844
Author(s):  
Antonín Mikš ◽  
Jiří Novák
Keyword(s):  
Optical Center ◽  
Zoom Lens ◽  
Fixed Position

Three-element zoom lens with fixed distance between focal points

2012 ◽  
Vol 37 (12) ◽  
pp. 2187 ◽  
Author(s):  
Antonin Mikš ◽  
Jiří Novák ◽  
Pavel Novák
Keyword(s):  
Zoom Lens ◽  
Focal Points ◽  
Fixed Distance

Paraxial analysis of four-component zoom lens with fixed distance between focal points

2012 ◽  
Vol 51 (21) ◽  
pp. 5231 ◽  
Author(s):  
Antonin Miks ◽  
Jiri Novak
Keyword(s):  
Zoom Lens ◽  
Focal Points ◽  
Fixed Distance

Integrating perspectives: How the development of second-personal competence lays the foundation for a second-personal morality

2020 ◽  
Vol 43 ◽  
Author(s):  
John Corbit ◽  
Chris Moore
Keyword(s):  
Empirical Evidence ◽  
Developmental Process ◽  
Focal Point ◽  
Personal Information ◽  
Personal Competence ◽  
Triadic Interactions ◽  
Personal Morality ◽  
Integrative Process

Abstract The integration of first-, second-, and third-personal information within joint intentional collaboration provides the foundation for broad-based second-personal morality. We offer two additions to this framework: a description of the developmental process through which second-personal competence emerges from early triadic interactions, and empirical evidence that collaboration with a concrete goal may provide an essential focal point for this integrative process.

CBED Shadow Images and Cs:Aberration Measurement

1982 ◽  
Vol 40 ◽  
pp. 696-697
Author(s):  
R. W. Carpenter ◽  
I.Y.T. Chan ◽  
J. M. Cowley
Keyword(s):  
Focal Point ◽  
Spherical Aberration ◽  
Optic Axis ◽  
Wide Angle ◽  
Caustic Surface ◽  
Convergent Beam

Wide-angle convergent beam shadow images(CBSI) exhibit several characteristic distortions resulting from spherical aberration. The most prominent is a circle of infinite magnification resulting from rays having equal values of a forming a cross-over on the optic axis at some distance before reaching the paraxial focal point. This distortion is called the tangential circle of infinite magnification; it can be used to align and stigmate a STEM and to determine Cs for the probe forming lens. A second distortion, the radial circle of infinite magnification, results from a cross-over on the lens caustic surface of rays with differing values of ∝a, also before the paraxial focal point of the lens.

High Resolution Specimen Area Imaged Under Negligible Field Aberrations

1970 ◽  
Vol 28 ◽  
pp. 540-541 ◽  
Author(s):  
T. Yanaka ◽  
K. Shirota
Keyword(s):  
High Resolution ◽  
Field Distribution ◽  
Image Space ◽  
Beam Deflection ◽  
Objective Lens ◽  
Resolution Limit ◽  
Leakage Flux ◽  
Specimen Area ◽  
Points Of View ◽  
Aberration Theory

It is significant to note field aberrations (chromatic field aberration, coma, astigmatism and blurring due to curvature of field, defined by Glaser's aberration theory relative to the Blenden Freien System) of the objective lens in connection with the following three points of view; field aberrations increase as the resolution of the axial point improves by increasing the lens excitation (k2) and decreasing the half width value (d) of the axial lens field distribution; when one or all of the imaging lenses have axial imperfections such as beam deflection in image space by the asymmetrical magnetic leakage flux, the apparent axial point has field aberrations which prevent the theoretical resolution limit from being obtained.

Sign in / Sign up

Export Citation Format

Share Document