Results 61 to 70 of about 53,610 (191)
Optical Tweezers as an Effective Tool for Spermatozoa Isolation from Mixed Forensic Samples [PDF]
, 2019 A single focus optical tweezer is formed when a laser beam is launched through a high numerical aperture immersion objective. This objective focuses the beam down to a diffraction-limited spot, which creates an optical trap where cells suspended in ...
Auka, Nicole +6 more
core +4 more sources
Switching of three-dimensional optical cages using spatial coherence engineering
APL PhotonicsPrecisely capturing and manipulating microparticles is the key to exploring microscopic mysteries. Optical tweezers play a crucial role in facilitating these tasks. However, existing optical tweezers are limited by their dependence on specific beam modes,
Ying Xu +6 more
doaj +1 more source
Holographic Optical Tweezers: Techniques and Biomedical Applications
Applied Sciences, 2022 Holographic optical tweezers (HOT) is a programmable technique used for manipulation of microsized samples. In combination with computer-generation holography (CGH), a spatial light modulator reshapes the light distribution within the focal area of the ...
Hui-Chi Chen, Chau-Jern Cheng
doaj +1 more source
Towards absolute calibration of optical tweezers [PDF]
, 2006 Aiming at absolute force calibration of optical tweezers, following a critical review of proposed theoretical models, we present and test the results of MDSA (Mie-Debye-Spherical Aberration) theory, an extension of a previous (MD) model, taking account ...
A. Mazolli +6 more
core +2 more sources
Characterizing conical refraction optical tweezers [PDF]
Optics Letters, 2014 Conical refraction occurs when a beam of light travels through an appropriately cut biaxial crystal. By focussing the conically refracted beam through a high numerical aperture microscope objective, conical refraction optical tweezers can be created, allowing for particle manipulation in both Raman spots and in the Lloyd/Poggendorff rings. We present a
McDonald, Craig +3 more
openaire +4 more sources
Methods and Protocols, 2020 Precise creation, maintenance, and monitoring of neuronal circuits would facilitate the investigation of subjects such as neuronal development or synaptic plasticity, or assist in the development of neuronal prosthetics.
Frank H. Kung, Ellen Townes-Anderson
doaj +1 more source
Micromachines, 2022 Cooperative manipulation through dual-arm robots is widely implemented to perform precise and dexterous tasks to ensure automation; however, the implementation of cooperative micromanipulation through dual-arm optical tweezers is relatively rare in ...
Yoshio Tanaka, Ken’ichi Fujimoto
doaj +1 more source
Nanotrapping and the thermodynamics of optical tweezers [PDF]
, 2006 Particles that can be trapped in optical tweezers range from tens of microns down to tens of nanometres in size. Interestingly, this size range includes large macromolecules.
Heckenberg, N. R. +3 more
core +1 more source
Holographic aberration correction: optimising the stiffness of an optical trap deep in the sample [PDF]
, 2011 We investigate the effects of 1st order spherical aberration and defocus upon the stiffness of an optical trap tens of μm into the sample. We control both these aberrations with a spatial light modulator. The key to maintain optimum trap stiffness over a
Bowman +22 more
core +1 more source
Optical trapping core formation and general trapping mechanism in single-beam optical tweezers
New Journal of Physics, 2022 The working mechanism of single-beam optical tweezers is revisited using a recently established method. The optical force is split into conservative and nonconservative components, and these components are explicitly calculated for particles in the ...
Di Huang +7 more
doaj +1 more source