CaliBall (NEW)
Qualify your
transmission sphere in minutes anytime you need it and
be confident of the results. Extremely Round and
Perfect, Uses ‘Random Ball Test’ to Determine the Error
in Transmission Spheres. The calibration can be done in
as little as 10 minutes and the result is difficult to
dispute. It works with wide range of transmission
spheres, from F/0.7 to F/11 and with ROC as small as
12.7mm (0.5”).
Tips & Tricks
Identifying
Peaks and Valleys with Interferometric Static Carrier
Techniques
With phase
shifting techniques, peaks can be differentiated from
valleys with certainty. With spatial carrier techniques,
prior knowledge is required to determine the proper
polarity of a measurement. By making a measurement on a
surface known to be concave or convex, it is possible to
insure the measurement data is always correct, even for
surfaces of unknown shape.
Position the known
surface on the tip/tilt stage of the interferometer. Set
up IntelliWave to use the IntelliPhase spatial carrier
method. Adjust the tilt stage to apply the necessary
amount of tilt, one wave per four pixels. Note the
direction in which the tilt adjustment was added,
clockwise or counterclockwise relative to a NULL fringe.
Acquire the fringe data and generate the OPD wavefront.
If the surface shape (convex or concave) matches the
known shape of the optic, then the tilt was added with
the correct direction. If the center height does not
match, then the tilt should be added with the opposite
direction. Once it is determined which direction to
adjust the tilt stage to get the correct polarity,
always use this same direction of adjustment for all
parts.
Note1: adding tilt
in a given direction using the sample stage may not have
the same effect as adding a direction of tilt to the
stage for the reference optic. Always be consistent when
adding the necessary tilt and the measurement can be
made with complete certainty.
Note2: If you do not
have a known convex/concave optic, then you can gently
push on the test or reference optic to slightly shorten
the distance between the test and reference optic. If
the circular fringes move outward then the optic is
convex. If the circular fringes move inward then the
optic is concave.
Upcoming
Events
Mark your calendar for IntelliWave
Training in 2007. Re-sharpen your
interferometric measurement & analysis skills. Learn
more about the new features in IntelliWave and see
how it can 'boost' the quality of your measurement
analysis and productivity.
- 29-31 Jan: 3-Day,
San Jose, California
- 16-19 Apr: 4-Day, Tucson,
Arizona
- 9-12 Jul: 4-Day, Tucson, Arizona
- 15-18
Oct: 4-Day, Tucson, Arizona
Visit us at the
following exhibitions:
- BIOS 20-21 Jan 2007, San
Jose, California, USA. Booth # 8414
- Photonics West
23-25 Jan 2007, San Jose, California, USA. Booth #
414.
Product Demo: IntelliWave 2007
Best
Regards,
Kristi Helmrich
Sales Account Manager
--
Engineering Synthesis
Design, Inc.
310 S. Williams Blvd., Suite
210
Tucson, AZ 85711-4483
Tel
+1(520)296-3068 x121
Fax
+1(520)296-2897
http://www.engsynthesis.com/