A two-color heterodyne interferometer for measuring the refractive index of air using an optical diffraction grating

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.

Download Full-text

Enhancement of optical resolution in three-dimensional refractive-index tomograms of biological samples by employing micromirror-embedded coverslips

Lab on a Chip ◽

10.1039/c8lc00880a ◽

2018 ◽

Vol 18 (22) ◽

pp. 3484-3491 ◽

Cited By ~ 1

Author(s):

Seungwoo Shin ◽

Jihye Kim ◽

Je-Ryung Lee ◽

Eun-chae Jeon ◽

Tae-Jin Je ◽

...

Keyword(s):

Refractive Index ◽

Biological Samples ◽

Three Dimensional ◽

Optical Resolution ◽

Optical Diffraction ◽

Diffraction Tomography ◽

Optical Diffraction Tomography

Resolution-enhanced optical diffraction tomography using a micromirror-embedded coverslips.

Download Full-text

Refractive index determination in fuel cells using high-resolution laser heterodyne interferometer

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2010.06.015 ◽

2011 ◽

Vol 36 (20) ◽

pp. 13255-13265 ◽

Cited By ~ 4

Author(s):

Saeed Olyaee ◽

Mohammad Shams Esfand Abadi ◽

Samaneh Hamedi ◽

Fatemeh Finizadeh

Keyword(s):

Refractive Index ◽

Fuel Cells ◽

High Resolution ◽

Heterodyne Interferometer ◽

Laser Heterodyne

Download Full-text

Reconstruction of refractive-index distribution in off-axis digital holography optical diffraction tomographic system

Optics Express ◽

10.1364/oe.17.013758 ◽

2009 ◽

Vol 17 (16) ◽

pp. 13758 ◽

Cited By ~ 48

Author(s):

Tomasz Kozacki ◽

Rafal Krajewski ◽

Małgorzata Kujawińska

Keyword(s):

Refractive Index ◽

Digital Holography ◽

Optical Diffraction ◽

Refractive Index Distribution ◽

Index Distribution

Download Full-text

Fabrication of two-dimensional zinc oxide nanorod patterns and their application for optical diffraction grating effect

Journal of Materials Science ◽

10.1007/s10853-014-8541-4 ◽

2014 ◽

Vol 49 (24) ◽

pp. 8328-8334 ◽

Cited By ~ 2

Author(s):

Un Jeong Kim ◽

Sun Il Kim ◽

Sungwoo Hwang ◽

Jaehyun Hur

Keyword(s):

Zinc Oxide ◽

Diffraction Grating ◽

Optical Diffraction ◽

Two Dimensional

Download Full-text

Three-dimensional refractive index distributions of individual angiosperm pollen grains

10.1101/353243 ◽

2018 ◽

Author(s):

Chansuk Park ◽

SangYun Lee ◽

Geon Kim ◽

SeungJun Lee ◽

Jaehoon Lee ◽

...

Keyword(s):

Refractive Index ◽

Three Dimensional ◽

Pollen Grains ◽

Optical Diffraction ◽

Diffraction Tomography ◽

Optical Diffraction Tomography ◽

Internal Structures ◽

Quantitative Analyses ◽

Angiosperm Pollen ◽

Preparation Techniques

Three-dimensional (3D) refractive index (RI) imaging and quantitative analyses of angiosperm pollen grains are presented. Using optical diffraction tomography, the 3D RI structures of individual angiosperm pollen grains were measured without using labeling or other preparation techniques. Various physical quantities, including volume, surface area, exine volume, and sphericity, were determined from the measured RI tomograms of pollen grains. Exine skeletons, the distinct internal structures of angiosperm pollen grains, were identified and systematically analyzed.

Download Full-text