The Interferometer is used mainly for measuring the surface irregularity of spherical surfaces. The interferogram shows clearly on the attached screen allowing for easy measurement of surface irregularity.
The interferometer also comes with a digital scale that can be used for measuring radius of curvature. The interferometer can measure radii of curvature from +150 to -250 mm.
The spectrophotometer is a UV-VIS-NIR transmission based spectrophotometer with a range from 200 nm to 1100 nm.
In every coating cycle we place a test flat (witness piece) and measure the transmission off this flat as a way of certifying the AR coating.
We have made our own certified Focometer complete with collimator, measuring microscope, digital scale and rotation stage.
The Focometer can measure Back Focal Distance up to 100 mm.
The rotation stage allows us to rotate the lens while the measuring microscope allows us to measure the resulting deviation and thus compute the centration error.
We measure the center thickness of the lens using a 1 micron LC Mitutoyo Dial Gauge mounted on a stand.
We measure the diameter of the lens using a go-nogo gauge or Vernier Callipers.
For Radii of Curvature outside the range of our interferometer, we use ball cup spherometers of various sizes
We have developed special tables that allow for quick and detailed inspection of the lenses for aesthetic defects like scratches, digs, pits etc.
The table has a black and white background so that any pits (in case of glass lenses) or inclusions (in case of plastic lenses) show up easily against the back and white ground.
The table has a 4X Magnifier to allow for magnified view of the lens.
The lens is viewed under a bright collimated halogen light beam that scatters off any defect (like a scratch) to make it immediately visible.
For First Article Report for newly molded plastic injection molded components, we use our own line of Video Inspection and Measurement systems to measure the linear dimensions and other features.
For more details, please visit the Video Inspection and Measurement Webpage under: url of webpage.