摘要:

Solutions envisagées pour la compensation, description d'une expérience de spectrographie à grande étendue. Explication approfondie de la méthode, ses liens avec la cohèrence, le problème de l'analyse harmonique des images déja traité par le dédoublement transversal d'une source étendue monochromatique, conception d'un spectrographe par transformation de Fourier qùi en résulte. Evaluation de l'étendue des faisceaux acceptés dans le procédé à deux réseaux.

ISSN:0030-3909    

DOI:10.1080/713818439

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

In previous OTF computer programs, various geometrical optical aspects of image formation appear often to have been ignored. The neglect of factors associated with anamorphotic imagery, pupil aberrations and vignetting, and a shift of focal plane can lead to considerable errors in the computed values of the transfer function, particularly for high-aperture or wide-angle systems. In addition, the numerical integration processes employed have not always been entirely satisfactory in terms of efficiency, generality, and convenience.

ISSN:0030-3909    

DOI:10.1080/713818436

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818442

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

It is shown that the sensitivity of an interferometer for optical thickness measurement can be reduced by passing both the beams through the sample but at different angles. A method of compensation is described, to make the effective widths of the two beams equal at the sample surface. This technique allows the sensitivity of an interferometer to be varied over a wide range and is suitable for use with samples of thickness less than 1 mm. Two interferometers with reduced sensitivity are described; one of these is a Twyman-Green type and the other is a Mach-Zehnder type. At reduced sensitivity the interferometers do not give correctly the thickness variation in a sample which has an appreciable curvature. The precautions to be taken for testing such samples are discussed.

ISSN:0030-3909    

DOI:10.1080/713818433

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Statistical properties of laser irradiance fluctuations beyond a layer of turbulent atmosphere are investigated. The treatment is based on the phase-screen approximation.

ISSN:0030-3909    

DOI:10.1080/713818437

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818441

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/715120912a

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818434

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

ISSN:0030-3909    

DOI:10.1080/713818435

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor