Lens Interferometry

Conduct Research

• Spatial Coherence in Interferometry
  of the collimator lens and the ocular lens with beam splitter in. between and the CCD detector behind the ocular lens. The imaging aperture is located in the. common focal plane of the collimator lens and the ocular lens. This arrangement is a Kepler. telescope, which is an "afocal system...
• Advances in Interferometric Metrology
  . interferometer for testing spherical mirrors is shown in Figure 1. A magnified image of the scatterplate is shown in the. upper left corner of the figure. A small circular aperture is illuminated with a laser or broadband source producing a. source of limited extent for the interferometer. A focusing lens...
• MICRO: Tool Fab Support
  . This capability is achieved by using a phase-measurement interferometry (PMI) system, which determines Zernike coefficients up to F81. For optimal results, PMI data measurements should be performed at several stages throughout the lens-manufacturing process. As indicated in Figure 4, progress...
• Inside Filters
  ), isolating particular wavelengths (analytical chemistry and spectroscopy), and improving lens performance (usually imaging). Wavelength Isolation: Many applications, such as interferometry, require monochromatic sources. The creation of monochromatic light can be achieved by isolating natural...
• Collimation Tester
  of the lens in the beam expander (or. collimator) until horizontal fringes are observed in the. reflection. For 633 nm, there should be three to five. fringes visible in the reflection (for shorter wavelengths. more fringes will be visible). When fringes are. horizontal, the beam is well collimated...
• Dynamic Phase-Shifting Electronic Speckle Pattern Interferometer
  coupling to assist in the alignment of the incident polarization with the. fast or slow axis of the fiber. The field of illumination for the test beam is controlled changing the separation. between the illumination lenses. The test article is imaged onto the CCD via an imaging lens relay combination...
• What is Frequency Domain Analysis?
  . mechanically scan the objective lens of an interferometric microscope to generate a sequence of. interferograms, which are transformed to get phase information. However, the interferograms. generated by the NewView are far more complex, because of its white-light source. This. complexity is to our advantage...
• Another way to peer inside the body
  more light was used to probe the sample. One technique used to overcome the mirror problem was borrowed from scientists measuring femtosecond light pulses from ultrafast lasers. The light first goes through a diffraction grating and lens before hitting the mirror. This distributes the spectrum...
• MICRO: Products
  motion of MEMS and other microstructures with subnanometer resolution. The high-sensitivity, high-speed 1.3-megapixel imaging system is more sensitive and faster than its predecessor, allowing rapid data acquisition and a wide field of view. A multiple magnification lens turret enables rapid target...
• Astronomers Measure Mass Of A Single Star -- First Since The Sun
  in the galaxy. The red star first caught astronomers' attention when its orbit crossed paths with another star. Its gravity deflected the light shining from the more distant star and magnified it like a lens. During these so-called gravitational microlensing events, the faraway star appears to get...

Engineering Web Search: Lens Interferometry