Finesse measurement from 5 to 35+
OFA's new instrument projects a series of rings, produced by the etalon in diverging light, on to a CCD camera. The image is captured into a standard PC and the finesse calculated using OFA's software.
Finesse measurement from 5 to 35+ User friendly "point and click" software
Wavelength range from 193 nm to 1.06 micron
Measures both solid and air spaced etalons
Image digitisation to 8 bit, 768 x 576 resolution gives high accuracy, repeatable results
Available as an "add-on" applications module of Fringe Master
Etalon-Master accepts a standard video signal as input and digitises the image to 8 bits, 768 x 576 resolution in real time to provide a live image display.
A software controlled gain and offset adjustment with a cross section display helps the user to adjust the settings to achieve the best possible image.
Etalon-Master accepts both European (CCIR) or U.S. (RS170) video standard inputs.
Fast, easy to use software is at the heart of Fringe-Master.
The CCD image of the ring pattern is digitised, loaded into a framestore and displayed on the PC screen.
Etalon-Master plots intensity cross sections through the ring pattern and determines the width and position of the peaks automatically.
Sub-pixel accuracy, obtained by analysis of multiple lines through the image and by tracking the shape of the transmission peaks, gives a measurement with high dynamic range. This data is then used to calculate the finesse of the etalon.
Typical analysis time is less than 5 seconds!
The user can choose between horizontal, vertical or radial scans depending on the Q.A. requirement.
Etalon-Master provides a hard copy report of measurements for Q.A. and record keeping. The report includes a screen dump of the ring pattern, results and parameters of the measurement and a statistical analysis of the radial variation of the finesse