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Qu'est-ce (qui) est tweezers$85882$ - définition

PHILATELIC TOOL

Stamp tong; Stamps tweezers; Stamp tweezers

Optical tweezers

$Dielectric objects are attracted to the center of the beam, slightly above the beam waist, as described in the text. The force applied on the object depends linearly on its displacement from the trap center just as with a simple spring system. It is a restoring force and thus equal to <math>-k_\mathrm{trap} x</math>.$

INSTRUMENT USING A HIGHLY FOCUSED LASER TO PROVIDE AN ATTRACTIVE OR REPULSIVE FORCE (ON THE ORDER OF PICONEWTONS) TO HOLD AND MOVE MICROSCOPIC DIELECTRIC OBJECTS SIMILAR TO TWEEZERS

Optical trapping; Optical trap; Optical Tweezers; Dark optical trap; Optical levitation; Laser levitation; Dipole trap; Optical Tweezer; Light trap; Gradient optical force; Laser tweezer; Laser tweezers; Optical tweezer; Laser trap; Laser Levitation; Single-beam gradient force trap; Far-off resonance trap

Optical tweezers (originally called single-beam gradient force trap) are scientific instruments that use a highly focused laser beam to hold and move the microscopic and sub-microscopic objects like atoms, nanoparticles and droplets, in a manner similar to tweezers. If the object is held in air or vacuum without additional support, it can be called optical levitation.

https://en.wikipedia.org/wiki/Optical_tweezers

tweezers

TOOLS USED FOR PICKING UP OBJECTS TOO SMALL TO BE EASILY HANDLED WITH THE HUMAN HANDS

Tweezer

n. pl.

Nippers, pincers.

Tweezers

TOOLS USED FOR PICKING UP OBJECTS TOO SMALL TO BE EASILY HANDLED WITH THE HUMAN HANDS

Tweezer

Tweezers are small hand tools used for grasping objects too small to be easily handled with the human fingers. Tweezers are thumb-driven forceps most likely derived from tongs used to grab or hold hot objects since the dawn of recorded history.

https://en.wikipedia.org/wiki/Tweezers

Wikipédia

Stamp tongs

Stamp tongs are tweezers used to handle postage stamps. They are used by stamp collectors and philatelists, because they are a reliable way to hold and move stamps without damaging or getting skin oils on them. The jaws of stamp tongs are smooth in contrast to the striated jaws of the type of tweezers one might use to grasp and pull a thorn; such tweezers will damage stamps. They can also be an efficient way to handle a small stack of stamps.

Stamp tongs are nearly always made of metal, with lengths ranging from 10–20 cm (4–8 in). The tip is usually thin, so it can slide under a stamp easily, and may come in several different forms.

The "shovel" tip is a broad spatula shape, often bent at an angle. The "pointed" tip tapers to a sharp point; while useful for precise positioning, as when mounting the stamp on a page or picking a particular stamp from a pile, the sharper tip can also tear a delicate stamp. There are also "rounded" tips available that beginning stamp collectors like to use to avoid damaging their collection.

https://en.wikipedia.org/wiki/Stamp tongs