optical lever

optical lever

[′äp·tə·kəl ′lev·ər]
(optics)
A device for measuring small angular displacements of a rotating body in which a narrow fixed beam of light is directed onto a small mirror attached to the body and the reflected beam is directed onto a screen, producing a spot of light whose position is measured.
References in periodicals archive ?
Figure 1 shows a laser based measurement setup (also called optical lever method) wherein a laser beam, reflected from the surface of the cantilever, is detected by split photo-detectors that can measure the deflections with high accuracy (0.
Later, the thiol self-assembled mono-layers (SAMs) on the other cantilever (sensor) were observed with optical lever and interferometry methods.
The deflection caused is then measured with an optical lever, and because the probe is so small (20 x 20.
Optical Lever Noise: Diffraction limited optics with a low coherence light source provide the most sensitive optical lever detection scheme commercially available, 0.
Optical Lever Interference: Typically, most SPMs have optical interference caused by laser light reflecting off the cantilever and light reflecting off the sample.
A motion detection system, typically an optical lever with a laser shining on the probe, keeps track of how the cantilever tip is moving up and down.
When scanning, the interaction between the tip and the sample is monitored by an optical lever, or a beam-deflection system.