2" x 2" Optical Flat - Master Grade /Flatness Gage 1/8 Wave Band, Flawless NEW!

Description

Up for sale is a
Dual-Side 2" x 2" Reference Flat
accurate to 2 micro-inch (1/8th wave band).   Made from UV grade fused silica, this optical window has the hardness, & low expansion coefficient for your project needing a precision
reference flat or
window
.  You can't make what you can't measure
so this will give you the ability to guarantee flatness.   Side 1 and side 2 are
very parallel
to 10 arc sec.
This is un-coated on both sides.
Absolutely
in
Pristine New Condition in sealed packaging!!
The monochromatic flatness image shows how flat these parts are.
SPECS:
Substrate: Fused Silica, Grade 0A
Size: 2" x 2" (50.8
mm x 50.8mm)
Thickness: 1/4" (6.4 mm)
Part
Number: ZKN-7
Accuracy Side 1:
MASTER GRADE
1/8
wave band 546nm
0.000,002
inch
Accuracy Side 2:
MASTER GRADE
1/8
wave band 546nm
0.000,002
inch
Parallelism: <10 arc sec
As always,
your complete satisfaction is guaranteed
.  If not 100% satisfied with this, you may return.  I have many happy customers and would like you to become one as well.  Sizes up to 5” dia. available.
Winning bid to pay .75 shipping within USA.