摘要:

A study is made of the problems in preparing cemented cube beam-splitters which are absorption free, spectrally neutral and provide equal reflectance and transmittance for unpolarized light. Several designs are discussed and it is concluded that the most practicable is a six-layer coating of zinc sulphide and magnesium fluoride enclosed in a crown glass cube. When used in a visual instrument, the reflected and transmitted images formed by this beam-splitter are sensibly equal in brightness and colour.

ISSN:0030-3909    

DOI:10.1080/713818480

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Exact synthesis of three to six component quarter-wave broad-band anti-reflection systems for substrates of the germanium type (n-4.0) was performed by the rational function method. Frequency transformations were used to match the prototype Butterworth and Chebyshev functions to the rationalized transmissivities.

ISSN:0030-3909    

DOI:10.1080/713818479

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818483

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818481

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

When an afocal system is used visually, the usual interpretation of its aberration coefficients is inappropriate if the area of the exit pupil is much greater than that of the pupil of the eye. If the only aberration present is distortion, the observer will see a sharp though distorted image whose shape is independent of the position of the eye in the exit pupil. However, if other aberrations are present, the image will be blurred and its shape will depend on the location of the eye; spherical aberration, coma, etc., of the afocal system are apparent to the observer as a form of distortion, mobile distortion. The mobile distortions corresponding to the low order aberrations of a symmetric system, and of a translationally symmetric system are discussed.

ISSN:0030-3909    

DOI:10.1080/713818482

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818484

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/715120920a

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor