DIAMOND TURNING OPERATIONS

Overview

Our brand new temperature controlled facility is equipped with ultra precision state-of-the-art 350UPL and two 250UPL single point diamond turning lathes made by Nanotechnology System of Keene, NH. We are able to manufacture spherical and aspherical surfaces of most infrared optics up to 350 mm, in diameter including Ge and ZnSe, Cleartran and CaF2 lenses. Aluminum, Copper, Nikel plated mirrors are available. We can achieve the surface roughness of 2.5 nm Ra on Ge, 1.1 nm Ra on CaF2 and 2.0 nm Ra on Aluminum. Our measurement and testing capabilities include new ZYGO GPI High Resolution interferometer, surface roughness, ZYGO New View 5000 microscope and Taylor-Hobson proliferometer.

Materials

We have recently made aspheric and spherical lenses by diamond turning from CaF2, BaF2, GaAs, CdTe, Silicon, Ge, ZnSe and ZnS.

Surface Profile

We can make any spherical or aspheric surface with rotational symmetry, on-axis or off-axis. The aspheric surface described as higher order polynomials up to 20th order and includes conical, elliptical, parabolic and other profiles.

Test and Measurement Capability

  • Contact Profilometer:
    • The Moore Nanotechnology Work-piece Error Compensation system (WEC) version 2.2.7 provides high-accuracy part geometry measurements for spherical and aspheric surfaces. Consists of the Moore NTS ultra precision motion system and controller, LVDT probe with A/D card and WEC software.
  • Electronic Microscope:
    • The New View 5000 System, model# 5010 is an electronic microscope with a high-resolution camera, with selectable resolution up to 640 x 480 pixels, with 10x Mirau objective. Provides images and measures the microstructure and topography of surfaces in three dimensions. Has vertical resolution 0.1 nm, lateral resolution 1.18 um, 200x system magnification.
  • Interferometer:
    • Zygo GPI XPHR interferometer has high-resolution high speed camera. Provides non-contact measurement of flat and spherical surfaces, and transmitted wavefront measurements. Fringe resolution up to 180 fringes.

Samples

Sample 1 : Ge Aspheric Lens
Sample 2 : BaF2 aspheric Lens