نتایج جستجو برای: optical axis

تعداد نتایج: 363895  

Journal: :Optics express 2004
Alexander Jesacher Severin Fürhapter Stefan Bernet Monika Ritsch-Marte

We demonstrate a flexible setup for holographic steering of laser tweezers in microscopy using a high resolution spatial light modulator (SLM). In contrast to other methods, hologram read-out is done in the off-axis Fresnel regime rather than in the typically used on-axis Fourier regime. The diffractive structure is calculated as a Fresnel hologram, such that after reflection at the SLM only th...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2007
Alexander V Goncharov Chris Dainty

We propose a wide-field schematic eye model, which provides a more realistic description of the optical system of the eye in relation to its anatomical structure. The wide-field model incorporates a gradient-index (GRIN) lens, which enables it to fulfill properties of two well-known schematic eye models, namely, Navarro's model for off-axis aberrations and Thibos's chromatic on-axis model (the ...

Journal: :Optics express 2008
Moritz K Kreysing Tobias Kiessling Anatol Fritsch Christian Dietrich Jochen R Guck Josef A Käs

The optical cell rotator (OCR) is a modified dual-beam laser trap for the holding and controlled rotation of suspended dielectric microparticles, such as cells. In contrast to optical tweezers, OCR uses two counter-propagating divergent laser beams, which are shaped and delivered by optical fibers. The rotation of a trapped specimen is carried out by the rotation of a dual-mode fiber, emitting ...

Journal: :Optics express 2006
Vicente Mico Zeev Zalevsky Javier García

We present a new approach to obtain superresolved images in digital holography by means of synthetic aperture generation using common-path interferometry and off-axis illumination in optical imaging systems. The paper includes two parts. First, we present a simple approach to double the resolution of an optical system using tilted illumination onto the object and an optical element in the image...

Journal: :international journal of occupational hygiene 0
mohammad reza monazzam esmail pour department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran hamed jalilian department of occupational health engineering, school of public health, iran university of medical sciences, tehran, iran kamran najafi department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran seyed abolfazl zakerian department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran

original article   one type of electromagnetic fields, based on frequency range, is extremely low frequency (elf) fields. there are lots of reports about measuring elf-magnetic field (mf) in substations, power plants, cities and etc. this study aimed to compare the difference between measurement of three-axis and single-axis probe mf meters. elf-mf was measured by tes-1394 mf tester (three-axis...

   In This research the effect of fluorine and chlorine substituents on the electronic and opticalproperties of pentacene molecule have been investigated based on density functional theory as implemented in SIESTA code. The results show thatthe full replacement of hydrogen atoms with fluorine and chlorine in pentacene molecule, leads to ...

Journal: :Chemistry of Materials 2022

Low-dimensional materials with chain-like (one-dimensional) or layered (two-dimensional) structures are of significant interest due to their anisotropic electrical, optical, and thermal properties. One material a structure, BaTiS3 (BTS), was recently shown possess giant in-plane optical anisotropy glass-like conductivity. To understand the origin these effects, it is necessary fully characteriz...

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