摘要:

The aberrations and variation in transmission of a beam of light converging to a focus and passing through plates of calcite have been investigated, in order to estimate possible photometric errors due to these effects when a crossed calcite plate is used to calibrate photographic plates. The aberrations are calculated in terms of ray deviations whose magnitudes are derived, and the transmission coefficient is determined by solution of electromagnetic boundary conditions. The resultant formulae are evaluated numerically, and set limits on the photometric accuracy of images formed by a Schmidt telescope used with a calcite plate calibrator.

ISSN:0030-3909    

DOI:10.1080/713818462

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Expressions for transmittance and reflectance of light for a multilayer system containing one thick layer are derived by the method of amplitude transfer-matrices. For polychromatic light, conditions are given, such that those of the interference fringes which are due to the thick layer will be negligibly weak; an error estimate is given. An alternative method, that of intensity transfer-matrices, allows one to derive expressions in which the fringes due to an arbitrary number of thick layers are eliminated, while the interference effects caused by the thin layers are retained.

ISSN:0030-3909    

DOI:10.1080/713818456

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Die Bildfehler einer Röntgenstrahlenoptik, die nahe der Kantenzone benutzt wird, sind durch Δ≈f (α2δ + αδ2-¼δ3) abgeschätzt.fist die Brennweite,δder Winkel zwischen Einfallsrichtung und Achse, α der Winkel zwischen Strahl und Achse im Achsenpunkt des Bildes. Der erste Summand gibt die Koma, der zweite entspricht dem Astigmatismus, der letzte der tonnenförmigen Verzeichnung. Da der Offnungsfehler in der Achse verschwindet, gibt das Ergebnis eine vollständige ‘Seidelsche’ Entwicklung. Die strengen Formeln für die Aberrationen werden angegeben.

ISSN:0030-3909    

DOI:10.1080/713818458

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

The properties of the far-field intensity distribution due to generalized annular apertures, illuminated with partially coherent Besinc-correlated light, have been studied with particular emphasis on the encircled energy distribution and the variation of the degree of coherence in the diffracted field. A different approach than the usual has been used to derive analytical expressions suitable for computation. Numerical results are presented for a few representative apertures. Among other things, the two-point resolution is discussed according to three criteria and it is shown that the degree of coherence in the diffracted field is not generally stationary.

ISSN:0030-3909    

DOI:10.1080/713818463

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A new characteristic functionV‡, the phase characteristic, is defined. The derivatives of a certain aberration function related to it are exactly equal to the ray-aberrations. As an application the condition for local isoplanatism is considered. Some points relating to the displacement, as derived from different characteristic functions, are discussed.

ISSN:0030-3909    

DOI:10.1080/713818454

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Accuracies obtained for the visual task of pointing or centring a circular black measuring mark on a circular bright target are presented. To understand the complex pattern of pointing accuracies, the shape of the image actually seen by the visual system is computed. This is performed by convolving the luminance profiles of the targets with point spread functions of the visual system, which estimate effects of image blur and lateral inhibition. The resulting luminance profiles are then analysed and simple visual criteria on which the pointing task is based are derived.

ISSN:0030-3909    

DOI:10.1080/713818455

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818453

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/715120917

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818459

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor