Design and imaging performance of achromatic diffractive–refractive x-ray and gamma-ray Fresnel lenses

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Design and imaging performance of achromatic diffractive-refractive x-ray and gamma-ray Fresnel lenses.

Achromatic combinations of a diffractive phase Fresnel lens and a refractive correcting element have been proposed for x-ray and gamma-ray astronomy and for microlithography, but considerations of absorption often dictate that the refractive component be given a stepped profile, resulting in a double Fresnel lens. The imaging performance of corrected Fresnel lenses, with and without stepping, i...

متن کامل

Fresnel lenses for X-ray and Gamma-ray Astronomy

Phase Fresnel lenses have the same imaging properties as zone plates, but with the possibility of concentrating all of the incident power into the primary focus, increasing the maximum theoretical efficiency from 11% to close to 100%. For X-rays, and in particular for gamma-rays, large, diffraction-limited phase Fresnel lenses can be made relatively easily. The focal length is very long for exa...

متن کامل

Gamma Ray Fresnel lenses – why not ?

Fresnel lenses offer the possibility of concentrating the flux of X-rays or gamma-rays flux falling on a geometric area of many square metres onto a focal point which need only be a millimetre or so in diameter (and which may even be very much smaller). They can do so with an efficiency that can approach 100%, and yet they are easily fabricated and have no special alignment requirements. Fresne...

متن کامل

X-ray imaging with off-axis Bragg Fresnel multilayer lenses

We analyse the possibilities of using a new kind of Bragg Fresnel Multilayer Lens that we have designed in order to improve image contrastIl1. We discuss the aberrations and the dynamical properties of this lens on the base of a recently developed dynamical theory[zI and of the data from the first imaging tests that we have performed. The principle of the optimal configuration for utilisation o...

متن کامل

Phase Fresnel Lens Development for X-ray & Gamma-ray Astronomy

Observations in the hard X-ray and gammaray energy regimes are constrained by limited sensitivity and angular resolution. Significant gains could be made if these high-energy photons could be concentrated from a large area onto a small detector element and if diffraction-limited measurements could be obtained. Furthermore, the angular resolution in the gamma-ray band would be superior to that p...

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

ژورنال

عنوان ژورنال: Applied Optics

سال: 2004

ISSN: 0003-6935,1539-4522

DOI: 10.1364/ao.43.004845