Application of Light Diffraction by a System Consisting of an Ultrasonic Wave and a Phase Optical Diffraction Grating

1987 ◽  
pp. 219-224
Author(s):  
P. Kwiek ◽  
A. Markiewicz
Keyword(s):  
Ultrasonic Wave ◽  
Diffraction Grating ◽  
Optical Diffraction ◽  
Light Diffraction

A Two-Color Heterodyne Interferometer Based on Diffraction Grating for Displacement Measurement

2005 ◽  
Vol 295-296 ◽  
pp. 189-194 ◽  
Author(s):  
G.H. Wu ◽  
Z.J. Cai ◽  
Li Jiang Zeng
Keyword(s):  
Diffraction Grating ◽  
High Accuracy ◽  
Displacement Measurement ◽  
Optical Diffraction ◽  
Fringe Order ◽  
Heterodyne Interferometer

A two-color heterodyne interferometer based on the movement of the optical diffraction grating is proposed. The method allows us to measure the phase of synthetic wavelength f s directly and with high accuracy to extend the range of unambiguity for interferometric measurements by using two close wavelengths. Our experiment results show that the uncertainty in displacement measurement caused by the uncertainty in f s is 0.20 µm, smaller than the half of a single wavelength we used. The fringe order of a single wavelength can be determined without ambiguity. The uncertainty in displacement measurement can be improved further by using a single wavelength.

Fresnel Gaussian shape invariant applied to optical diffraction grating calculation

2021 ◽  
Vol 480 ◽  
pp. 126479
Author(s):  
Moisés Cywiak ◽  
David Cywiak ◽  
Joel Cervantes-L
Keyword(s):  
Diffraction Grating ◽  
Optical Diffraction ◽  
Gaussian Shape ◽  
Shape Invariant

Analysis of Ultrasonic Fields by Light Diffraction

1973 ◽  
Vol 51 (12) ◽  
pp. 1341-1349 ◽  
Author(s):  
J. Vrba ◽  
R. R. Haering
Keyword(s):  
Light Scattering ◽  
Ultrasonic Wave ◽  
Propagation Direction ◽  
Index Of Refraction ◽  
Light Diffraction ◽  
Strain Fields ◽  
Wave Fields ◽  
Ultrasonic Fields ◽  
The Relationship ◽  
Hexagonal Crystals

It is shown how the frequency, wavelength, intensity, and propagation direction of waves present in ultrasonic wave fields may be determined by light scattering experiments. The relationship between index of refraction variations and arbitrary strain fields is developed for hexagonal crystals and explicit results valid for CdS crystals are presented.

Microwave modelling of optical diffraction grating devices

1997 ◽  
Vol 144 (4) ◽  
pp. 221-227 ◽  
Author(s):  
J.R. James ◽  
I. Abd-Eldayem
Keyword(s):  
Diffraction Grating ◽  
Optical Diffraction

Optical biosensor assay (OBA)

1991 ◽  
Vol 37 (9) ◽  
pp. 1502-1505 ◽  
Author(s):  
Y G Tsay ◽  
C I Lin ◽  
J Lee ◽  
E K Gustafson ◽  
R Appelqvist ◽  
...  
Keyword(s):  
Diffraction Grating ◽  
Quantitative Measure ◽  
Optical Biosensor ◽  
Positive Sample ◽  
Antibody Binding ◽  
Optical Diffraction ◽  
Negative Sample ◽  
Coated Surface ◽  
Antigen Antibody ◽  
Inactive Protein

Abstract We describe a new biosensor immunoassay involving optical diffraction to detect clinically important analytes in human body fluids. A silicon wafer is used as a support for immobilization of antigen or antibody. The protein-coated surface is illuminated through a photo mask to create distinct periodic areas of active and inactive protein. When the surface is incubated with a positive sample, antigen-antibody binding occurs only on the active areas. Upon illumination with a light source such as a laser, the resulting biological diffraction grating diffracts the light. A negative sample does not result in diffraction because no antigen-antibody binding occurs to create the diffraction grating. The presence or absence of a diffraction signal differentiates between positive and negative samples, and the intensity of the signal provides a quantitative measure of the analyte concentration. The technique is demonstrated with a quantitative assay of choriogonadotropin in serum.

Sign in / Sign up

Export Citation Format

Share Document