ISSN:0030-3909    

DOI:10.1080/713820980

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

An interpretation is given to the wavenumber-dependent effective diffusion coefficient extracted from the scattered light spectra of a microemulsion system. At high concentrations of suspension this diffusion coefficient shows a minimum in its variation with wavenumber in a region well below the diffraction maximum in the static structure factor. The interpretation is based on an analogy with the Lorentz model, where particles diffuse in a random, static medium. Since a similar wavenumber variation is also found in the Lorentz problem, it is suggested that this behaviour is characteristic of correlated dynamical interactions between the diffusing particle and a structureless but dense medium.

ISSN:0030-3909    

DOI:10.1080/713820988

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713820972

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

An all-mirror system for application in coherent image processing is described. A system with a parabolic mirror offers advantages such as unit magnification, panchromatic correction and the introduction of minimal scattering noise into the Fourier transform plane and the final image. The Fourier transform properties of this system are acceptable for many applications.

ISSN:0030-3909    

DOI:10.1080/713820993

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The single-mode photoelectron counting formula derived using the Glauber-Sudarshan diagonal coherent state representation is generalised to fields for which no well behaved Glauber-Sudarshan P-distribution exists using the generalized P-representation. From this formula the photocount distributions for a number-state and a squeezed-state are calculated.

ISSN:0030-3909    

DOI:10.1080/713820970

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713820991

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/716099601

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713820987

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713820974

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

For an optical system under incoherent imaging conditions, the finite aperture and non-negative point-spread function place restrictive bounds on the values of the corresponding optical transfer function. Under the extra condition that the transfer function be radially symmetric, these bounds can be characterized as the eigenvalues of a real symmetric integral operator. In this paper the bounds are calculated first by analytic inequalities that bound the operator norm, then by finding the eigenvalues of a Galerkin approximation to the operator. In contrast to the slit aperture case, the least upper bound and greatest lower bound are found to differ. The pupil functions which achieve these bounds at a given spatial frequency are determined, along with the associated transfer functions.

ISSN:0030-3909    

DOI:10.1080/713820990

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor