This study determines the flatness
and replication properties of a light guide plate with different microinjection molding parameters.
The deviation (dist) has to be smaller than the tolerance specification for the flatness
Comparison of measurements of flatness
has been made with different device and methods, measured with CMM, marble table and comparator.
does not imply U - (P), otherwise by Theorem 2.2, for cyclic right S-acts flatness
and Condition (P) coincide which is not true in general.
If you engage in research about any geometric dimensioning and tolerancing (GD&T) standard, you'll learn very quickly that flatness
is not a characteristic referenced to a datum.
This interface between aesthetic and psychological flatness
is addressed in a 1998 work (shot on both video and film) tellingly titled Flat Is Beautiful, in which Benning follows Taylor, a preadolescent tomboy, as she drifts through life.
His design engineer colleague, Walter Wrona, explains, "Flatness
of the components is an important criterion in the manufacture of sealing surfaces, but we also need a complete understanding of how the mating surfaces operate together in order to do meaningful reliability analysis." To this end, the company has integrated FlatMaster, a non-contact optical-based measurement tool, into their process.
Unfortunately, the powder also can add as much as 100 microns to the surface of the part, which affects the flatness
The PSA-80BW provides up to 20 GHz frequency coverage, 0.1 dB amplitude flatness
, 0.7 degree phase flatness
and offers optional 1.2 Gbyte deep capture memory to provide eight seconds of full band-width capture at the maximum sample rate.
Plane parallel components need to be measured for flatness
At the Army and Air Force's primary metrology laboratories, two other units are being used to measure the ac gain flatness
of state-of-the-art commercial ac voltmeters and calibrators at frequencies up to 30 MHz.
They deal mostly with sky with a flattish landscape at the bottom, so they could be the park's flatness
or that flatness
we know from The Wizard of Oz.
Spergel of Princeton University calls the finding "only incremental progress," because other studies had already indicated that the universe contains only one-third as much matter as needed for flatness
and supported the case for dark energy.--R.C.
Suitable for mounting, plating, polishing, etching and final dicing of GaN, GaAs, Si and other materials, these plates feature a flatness
to 0.5 fringes of HeNe and parallelism from 20 arc-secs to 1 arc-sec.