摘要:

Thermographic instruments using single-element line scanning usually have very low line frequencies in comparison with television. To meet the requirements for higher frame rates in thermography and infra-red viewing a line scanner with an indium antimonide detector and a rotating germanium prism has been designed. It produces heat images with 100 lines per frame on a television-type display tube at a flicker-free frame rate. The sweep efficiency of the scanning system is almost 100 per cent. The optical aberrations introduced by the scanning prism are analysed and found to be at a minimum when the refractive index lies between 3 and 4. Examples of heat pictures taken with different modes of operation are given.

ISSN:0030-3909    

DOI:10.1080/713818101

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818097

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

Mit Hilfe von mengentheoretischen Begriffen wird eine allgemeine Fassung für das dritte Graßmannsche Gesetz (über metamere Farben) angegeben, die für Trichromaten, Dichromaten und Monochromaten anwendbar ist, Dabei läßt sich (a) der Unterschied zwischen den Farben-fehlsichtigen, deren Farbensystem eine Reduktionsform des trichromatischen Farbensystems ist, und den sogen. anomalen Farbenfehlsichtigen, (b) die Bedeutung der Persistenz der Farbgleichungen leicht beschreiben. In Struk-turdiagrammen, deren Elemente im allgemeinsten Fall Farbreiz-Mengen, Farbvalenz-Mengen und Farbenräume sind, werden die Zusammenhänge dargestellt.

ISSN:0030-3909    

DOI:10.1080/713818106

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818100

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818109

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

A simple but general expression for the longitudinal Kerr coefficient is derived for a general multilayer structure containing a single magnetic film. The expression is given in terms of well-known optical parameters of the system such as the ‘Potential Transmittance’ of the magnetic film. A number of special cases are considered and the expression is then used to establish the details of design of systems with much larger Kerr coefficients than previously predicted.

ISSN:0030-3909    

DOI:10.1080/713818102

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

For the description of refraction and reflection of a polarized plane electromagnetic wave at a plane boundary of two homogeneous isotropic dielectrics the following 19 quantities are introduced: the reflection coefficientsr‖(E),r┴(E),r‖(H),r┴(H), the transmission coefficientst‖(E),t┴(E),t‖(H),t‖(H), the phase shifts on reflection δ‖(E), δ┴(E), δ‖(H), δ┴(H)for the components of both electric and magnetic vectors parallel and perpendicular to the plane of incidence, the reflectivitiesR‖,R┴, the transmissivitiesT‖,T┴, the difference of phase shifts δ = δ‖(E)− δ┴(E)− δ┴(H)− δ‖(H)and the coefficients A and B characterizing the rotation of the plane of vibration. In the case of natural light these four quantities are introduced: the reflectivityR, the transmissivityTand the degrees of polarization Prand Ptafter the reflection and refraction. The paper gives 12 graphs describing each of these 23 quantities as a function of two independent variables: the relative refractive index and the angle of incidence. The graphs are plotted in the region of refractive indices 0≦n≦3 and for angles of incidence 0°≦Θi≦90°.

ISSN:0030-3909    

DOI:10.1080/713818111

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818107

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/715120878

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/715120874

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor