Fraunhofer Diffraction Effects on Total Power for a Planckian Source

نویسنده

  • Eric L. Shirley
چکیده

An algorithm for computing diffraction effects on total power in the case of Fraunhofer diffraction by a circular lens or aperture is derived. The result for Fraunhofer diffraction of monochromatic radiation is well known, and this work reports the result for radiation from a Planckian source. The result obtained is valid at all temperatures.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Simplified diffraction effects for laboratory and celestial thermal sources

We discuss how evaluating the diffraction effects on total power in blackbody calibrations and total-solar-irradiance measurements can be done more efficiently. The methodology that is outlined has been applied to the VIRGO and SOVIM PMO6 radiometers, the DIARAD radiometer, and the SORCE TIM radiometer. Introduction Diffraction affects the flow of electromagnetic radiation through optical syste...

متن کامل

Development of new apertures for coherent X-ray experiments.

When one performs a coherent small-angle X-ray scattering experiment, the incident beam must be spatially filtered by slits on a length scale smaller than the transverse coherence length of the source which is typically around 10 microm. The Fraunhofer diffraction pattern of the slit is one of the important sources of background in these experiments. New slits which minimize this parasitic back...

متن کامل

Trans-Planckian Effects in Inflationary Cosmology and the Modified Uncertainty Principle

There are good indications that fundamental physics gives rise to a modified spacemomentum uncertainty relation that implies the existence of a minimum length scale. We implement this idea in the free scalar field theory that describes density perturbations in flat Robertson-Walker space-time. This leads to a non-linear timedependent dispersion relation that encodes the effects of Planck scale ...

متن کامل

A Cosmological Window on Trans-planckian Physics

In the framework of inflation, scales which nowadays correspond to large scale structures were smaller than the Planck length at the beginning of inflation. Therefore, measurements of CMBR anisotropy or surveys of galaxies and of clusters of galaxies could help us to probe physics beyond the Planck scale. In these proceedings, we study how the inflationary observables depend on trans-Planckian ...

متن کامل

Observing trans-Planckian ripples in the primordial power spectrum with future large scale structure probes

We revisit the issue of ripples in the primordial power spectra caused by trans-Planckian physics, and the potential for their detection by future cosmological probes. We find that for reasonably large values of the first slow-roll parameter ǫ ( > ∼ 0.001), a positive detection of trans-Planckian ripples can be made even if the amplitude is as low as 10. Data from the Large Synoptic Survey Tele...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره 106  شماره 

صفحات  -

تاریخ انتشار 2001