1. |
Perfectionnements à L'emploi d'un Ensemble Photomultiplicateur-interféromètre de Michelson pour les Mesures de Longueur D'onde et de Profil Spectral des Radiations Optiques de Grande Finesse |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 301-307
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ISSN:0030-3909
DOI:10.1080/713826303
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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2. |
Kontrastübertragungsfunktion und Bildgute |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 308-318
Georg Franke,
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摘要:
Der Zusammenhang zwischen geometrischen Aberrationen, Helligkeitsverteilung im Bild eines Punktes oder einer Linie und Kontrastübertragungsfunktion wird für die Bildmitte angegeben, um dann die Frage der günstigsten Einstellung zu erörtern. Dabei wird die Erfahrung bestätigt, wonach man bei den normalen Aberrationskurven in der Bildmitte für Tageslichtaufnahmen die beste Einstellung dort findet, wo die abszissenparallelen Tangenten an die Aberrationskurve den kleinsten Abstand voneinander haben. Gegenteilige Behauptungen, wonach die beste Einstellung allemal durch das Minimum der Streuung des Lichtes gegeben sei, beruhen auf einer im allgemeinen unzulässigen Näherung. Bei handelsüblichen Objektiven kann eine danach ermittelte Einstellung von der günstigsten erheblich abweichen.
ISSN:0030-3909
DOI:10.1080/713826299
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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3. |
Aktive Kontrastübertragungstheorie |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 319-338
A. Lohmann,
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摘要:
Bei den meisten Anwendungen der Kontrastübertragungstheorie gelten die Apparateeigenschaften (z.B. die Aberrationen) als bekannt. Daraus wird dann die Kontrastübertragungsfunktion berechnet. Hier dagegen lautet das Problem: wie muss der Apparat konstruiert werden, wenn eine ganz bestimmte Kontrastübertragungsfunktion gefordert wird? Unter diesem Aspekt wird die Kontrastübertragung für folgende Prozesse berechnet: Phasen- und Amplitudenfilter in der Pupille des Objektivs (periodisch oder statistisch, Fresnel-Linse); Bewegung des Bildes unter gleichzeitiger Variation der Beleuchtungsstärke; fotografische Kontrastverstärkung (steile Gradation, Nachbareffekt, Maskierung, Herschel-Methode); moderne Kontrastverstärkung (elektronische Maske Logetron, Fluoro-Dodge, Fernseh-Methoden).
ISSN:0030-3909
DOI:10.1080/713826306
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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4. |
Measurement of Refractive Index of a Transparent Film on a Reflecting Substrate |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 339-343
J.C. Kelly,
O.S. Heavens,
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ISSN:0030-3909
DOI:10.1080/713826309
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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5. |
On the Transfer Function of a Non-uniform Atmosphere |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 344-353
J.V. Ramsay,
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摘要:
A discussion is given of the effect on telescopic performance of an atmosphere which introduces a phase disturbance across the incident beam. The transfer functions for stationary and uniformly moving disturbances are deduced. Numerical examples are given for the case of a sinusoidal disturbance, and confirmatory experimental evidence is described.
ISSN:0030-3909
DOI:10.1080/713826308
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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6. |
Photographic Sensitivity of Image Intensifiers with Thin End Windows |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 354-366
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ISSN:0030-3909
DOI:10.1080/713826307
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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7. |
The Form of the General Unimodular Analytic Signal |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 367-371
S.F. Edwards G.B. Parrent,
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摘要:
Finding the most general unimodular analytic signal is shown to be equivalent to solving a singular integral equation of the Carleman type. This equation is solved utilizing the properties of analytic functions.
ISSN:0030-3909
DOI:10.1080/713826297
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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8. |
On the Possibility of Measuring Radiation by Using Thermomagnetic Effects Below and Close to the Curie Point |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 372-377
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ISSN:0030-3909
DOI:10.1080/713826300
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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9. |
Linearity of the Relationship between the Tristimulus Values of Corresponding Colours Seen under Different Conditions of Chromatic Adaptation |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 378-386
Elaine G.T. Wassef,
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摘要:
The hypothesis that the tristimulus values of the corresponding colours are linearly related is tested in three cases of chromatic adaptation. Test colours illuminated by yellow, magenta and green lights are matched against Munsell samples under the illuminant C in a binocular viewer of improved design, and the elements of the transformation matrices are calculated by the method of least squares. Scrutiny of the discrepancies between the values of the observed and the computed matches indicates that the hypothesis of linearity holds in these cases as it did in the previously investigated cases of adaptation to illuminants of continuous energy distributions. On the strength of this evidence the invariant colours are calculated in each case using the geometrical properties of the affine transformation. The red and the blue invariants differ but little from the earlier determinations. The third invariant still shows no inclination to any particular region of the colour chart.
ISSN:0030-3909
DOI:10.1080/713826298
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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10. |
Contrast Transmission Functions at Low Spatial Frequencies |
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Optica Acta: International Journal of Optics,
Volume 6,
Issue 4,
1959,
Page 387-403
E.H. Linfoot,
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摘要:
The relations existing at low spatial frequencies between the ray-theoretic ct-functiontof an optical system and the more exact ct-function τ predicted by the usual scalar wave model based on Huyghens' principle are investigated by sharpening and extending a recent analysis due to K. Miyamoto [1, 2]. An approximate expression is obtained for the difference betweentand τ, together with an explicit upper limit for the error of approximation in terms of the wave aberration of the system. This main result is shown, in § 3.2, to yield quick and easy proofs of most of the known results concerning the relations between the radial first and second derivatives oftand τ at the origin with each other, with aperture diffraction, and with the radius of gyration of the ray-theoretic image about the origin of coordinates. In § 4 it is shown that the above-mentioned scalar wave model has the following property: the increase, due to aberrations, in the moment of inertia of the diffraction image about any point in or near to its bright central region is equal to the increase in the moment of inertia of the ray-theoretic image about that point. The result is of some interest because of its formal equivalence to a statement of P.-M. Duffieux [3, 4] about the physical light distribution, although it does not suffice to prove that statement.
ISSN:0030-3909
DOI:10.1080/713826305
出版商:Taylor & Francis Group
年代:1959
数据来源: Taylor
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