optical tweezers

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optical tweezers

pl.n. (used with a sing. or pl. verb)
A technique that uses a single-beam laser directed through an objective lens to trap, image, and manipulate micron-sized particles in three dimensions.
References in periodicals archive ?
The device has been dubbed an Optical Trap Display (OTD) that is able to produce simple, free-floating outlines of objects including a butterfly and the university's logo.
The researchers say it can be used to remove liquid used with any type of optical trap, or even traps formed with acoustic waves.
To measure the retrograde movement, a bead was captured with the optical trap and the microscope stage was maneuvered to achieve the contact of the bead with the cell edge (within ~1 [micro]m from the edge of lamellipodium; Figure 1(b)).
An optical tweezer (optical trap) is a biophotonic device that uses the momentum generated by a sharp spatial gradient of laser intensity to trap micron-sized particles.
We compare the laboratories' reference standards by means of a temperature-controlled optical trap detector.
Previously, micrometre-sized crystals have been spun at up to 30,000 rpm using a different technology called an optical trap.
The two leading approaches are to use ions in an electrostatic trap, as Schatz and colleagues have done, or to use atoms in an optical trap, which holds things in place using the pressure of light.
The available microscope port also enables system modification for alternate applications, with potential add-ons, such as optical trap laser tweezers, for high-precision micromanipulation of microscopic particles, or an additional camera for high-resolution imaging.
In practice, a laser beam introduced into the optical path of the microscope and focused through a large numerical aperture objective lens converges to form an optical trap at the focal point for the laser.
As a preliminary step, the capabilities of the optical trap were tested using small latex spheres (1-3 [micro]m) in place of bacteria.
As nanoscale tools go, this new optical trap would be quite a versatile gadget.
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