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  • Optical Metrology for Large Telescope Optics
    measurement. Averaging several dynamic measurements cancels. the effect of turbulence, leaving only the optic’s shape in the measurement data. Measuring Large Concave Mirrors. Telescope mirror manufacturers, such as the Steward Observatory Mirror Lab, have mastered techniques for. producing lightweight
  • Introduction to reflective aberration corrected holographic diffraction gratings
    while providing a simple, cost-effective. design. Additional mirrors and mirror mounts are not necessary in concave aberration corrected grating designs. 3) System straylight parameters. 2. The process of manufacturing holographic gratings makes the grating surface smoother than ruled gratings
  • Advances in Interferometric Metrology
    . Direct-Direct. Direct-Scattered (Reference). Scattered-Direct (Test). Scattered-Scattered. Focusing. Lens. Interferogram. Mirror. Under Test. Imaging. Scatterplate. Lens. (Near center of curvature of. mirror being tested). Figure 1. Scatterplate Interferometer for Testing Concave Mirrors. It seems
  • Diamond Point Turning / Machining Considerations
    example of the secondary advantages offered by the diamond turning manufacturing process. In this example, the expander is an off-axis concave parabola. The substrate has been constructed with precision mounting diameters and a locating pinhole precisely spaced from the back end of the optic
  • Near Infrared ( NIR ) Applications with Miniature Fiber Optic Spectrometers
    improvements have. EPP2000C UV-VIS spectrometer, consists of an aberration. been made to ruggedize miniature fiber optic. corrected concave grating with no mirrors and a securely. mounted detector. There are no moving parts for portable. spectrometers for industrial and portable applications
  • Ultraviolet-Visible Spectrometry Characterization of
    and electronics leads to more compact, rugged and less expensive instrumentation. The use. of holographic concave gratings and CCD linear array detectors has made it possible to construct robust, sensitive. spectrometers ideal for deployment in rocketry and space missions. In this paper, we exploit
  • Medical Device Link .
    medical components offers continuous conical-needle grinding capabilities. The process produces mirror-finish parts with ultraprecision tips. Applications include solid conical points with straight linear tapers, and convex/concave or bullet-shaped profiles. Chamfered tubing and tapered pins can also
  • Amplitude and Phase Characterization of Ultrashort Laser Pulses
    frequencies, as is the case with positive GDD. Figure. concave spherical mirror and then focused into a thin. 3.2d shows the contribution of third order dispersion. nonlinear medium. For this application, the nonlinear. Similar to the SHG FROG, the SD FROG trace also displays a. medium