Scanning densitometer for continuous recording of spectral transmission density at low spatial contrast
نویسندگان
چکیده
منابع مشابه
Inverse spectral problems for Sturm-Liouville operators with transmission conditions
Abstract: This paper deals with the boundary value problem involving the differential equation -y''+q(x)y=lambda y subject to the standard boundary conditions along with the following discontinuity conditions at a point y(a+0)=a1y(a-0), y'(a+0)=a2y'(a-0)+a3y(a-0). We develop the Hochestadt-Lieberman’s result for Sturm-Lio...
متن کاملFirst Demonstration of Phase Contrast Scanning Transmission Electron Microscopy
Biological molecules are composed of light elements and can be considered as phase objects for the electron waves. Therefore, images of their unstained specimens show low contrast in transmission electron microscopy (TEM). Phase contrast TEM (P-TEM) is one of the powerful techniques to enhance image contrast of the phase objects [1]. In P-TEM, the phase plate (PP) is placed at a back focal plan...
متن کاملPhase contrast scanning transmission electron microscopy imaging of light and heavy atoms at the limit of contrast and resolution
Using state of the art scanning transmission electron microscopy (STEM) it is nowadays possible to directly image single atomic columns at sub-Å resolution. In standard (high angle) annular dark field STEM ((HA)ADF-STEM), however, light elements are usually invisible when imaged together with heavier elements in one image. Here we demonstrate the capability of the recently introduced Integrated...
متن کاملScanning transmission low-energy electron microscopy
We discuss an extension to the transmission mode of the cathode-lens-equipped scanning electron microscope, enabling operation down to the lowest energies of electrons. Penetration of electrons through free-standing ultrathin films is examined along the full energy scale, and the contribution of the secondary electrons (SEs), released near the bottom surface of the sample, is shown, enhancing t...
متن کاملذخیره 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: Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation
سال: 1971
ISSN: 0022-4316
DOI: 10.6028/jres.075c.004