# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 4 Search : transfer function
 modulation transfer function (MTF)   کریای ِ تراوژ ِ دگر‌آهنگش   karyâ-ye tarâvaž-e degarâhangešFr.: fonction de transfert de modulation   A measure of the ability of an optical system to reproduce (transfer) various levels of detail from the object to the image, as shown by the degree of contrast (modulation) in the image. → optical transfer function.→ modulation; → transfer; → function. optical transfer function (OTF)   کریا‌یِ تراوژ ِ نوری   karyâ-ye tarâvaž-e nuriFr.: fonction de transfert optique   The function that provides a full description of the imaging quality of an optical system. A combination of the → modulation transfer function (MTF) and the → phase transfer function (PTF) , the OTF describes the spatial (angular) variation as a function of spatial (angular) frequency.→ optical; → transfer; → function. phase transfer function (PTF)   کریای ِ تراوژ ِ فاز   karyâ-ye tarâvaž-e fâzFr.: fonction de transfert de phase   A measure of the relative phase in the image as function of frequency. It is the phase component of the → optical transfer function. A relative phase change of 180Â°, for example, results in an image with the black and white areas reversed.→ phase; → transfer; → function. transfer function   کریای ِ تراوژ   karyâ-ye tarâvažFr.: fonction de transfert   The mathematical relationship between the output of a control system and its input: for a linear system, it is the Laplace transform of the output divided by the Laplace transform of the input under conditions of zero initial-energy storage.→ transfer; → function.