Optical Lever Readout
Optical Lever Readout - Related Videos
04:39
Measurement of Chladni Mode Shapes with an Optical Lever Method
0 Views •
2020
A simple method of measuring the Chladni mode shape on an elastic plate by the principle of an optical lever is proposed.
07:18
Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
0 Views •
2019
The protocol aims to investigate the interaction between droplets and super-hydrophobic substrates in the air. This includes calibrating the measurement system and measuring the interaction force at super-hydrophobic substrates with different grid fractions.
06:55
Simple Bulk Readout of Digital Nucleic Acid Quantification Assays
0 Views •
Cited by 5 •
2015
We describe an endpoint digital assay for quantifying nucleic acids with a simplified (analog) readout. We measure bulk fluorescence of droplet-based digital assays using a standard qPCR machine rather than specialized instrumentation and confirm our results by microscopy.
07:08
Using Optical Coherence Tomography and Optokinetic Response As Structural and Functional Visual System Readouts in Mice and Rats
0 Views •
Cited by 18 •
2019
A detailed protocol for the assessment of structural and visual readouts in rodents by optical coherence tomography and optokinetic response is presented. The results provide valuable insights for ophthalmologic as well as neurologic research.
11:30
A Molecular Readout of Long-term Olfactory Adaptation in C. elegans
0 Views •
Cited by 2 •
2012
Here we describe a molecular readout of long-term olfactory adaptation in Caenorhabditis elegans. The Protein Kinase G, EGL-4, is necessary for stable adaptation responses in the primary sensory neuron pair called AWC. During prolonged odor exposure EGL-4 translocates from the cytosol to nucleus of the AWC.
FAQs
The optical path length determines how strongly a change in surface angle appears at the detector. After reflection, even a small angular change redirects the laser enough to shift the spot, and a longer propagation distance allows that shift to become more measurable. This geometric amplification helps reveal mechanical motion that would be difficult to observe directly.
In a typical engineering setup, the laser is the optical source, the mirror or cantilever is the moving reflective element, and the position-sensitive detector is the readout element. Mechanical motion changes the reflecting surface angle, which changes the beam direction. The detector then converts that directional change into a measurable spot-position change for interpretation.
Optical Lever Readout is useful when the quantity of interest produces a small angular response at a mirror or cantilever. The measured spot shift represents that angular change, while the optical path determines the response scale. Engineers can connect the optical measurement to cantilever deflection, vibration, force, or displacement when the mechanical design supplies that relationship.
The method’s sensitivity is governed by the relationship between reflecting-surface angle, optical path length, and detector spot position. A given angular change produces a spot displacement whose magnitude depends on how far the beam travels before detection. This makes path length an important design variable when engineers need a larger, more readily measured optical response.
A basic measurement arrangement directs a laser onto a mirror or cantilever, allows the reflected beam to travel to a position-sensitive detector, and observes the resulting spot position. The mechanical element is then displaced or otherwise perturbed, and the change in detector position is related to the reflecting-surface angle. That relation provides the optical readout of the mechanical response.
Engineers apply this readout in atomic force microscopy, microelectromechanical systems, and other high-sensitivity devices. In these settings, the reflected spot supplies a measurable signal for mechanical behavior that may involve cantilever deflection, vibration, force, or displacement. Its value is greatest when a device produces a small motion that must be translated into an observable detector response.