How to Specify Your Planar (Barrier) or
Wedged (Redirecting) Optic from VPG
Three Quality Grades plus Custom Specification
When you wish to order or to specify an optical component from VPG,
please take a moment to make sure that you review the following.
VPG offers three quick-to-specify optical grades, and, we will
fabricate custom optics to your spec, including super-precision grade.
Note that QUICK TURN optics
are available in Commercial (VPG G1) and Precision (VPG G2) grades (flats
only) and they are pre-specified already for your convenience.
Length, width, or diameter
|
Commercial: (VPG G1)
|
+/- .020in.
|
.5mm
|
|
Precision: (VPG G2)
|
+/- .005in.
|
.125mm
|
|
High Precision: (VPG Laser)
|
+/- .002in.
|
.05mm
|
|
Thickness
|
Commercial: (VPG G1)
|
+/- .010in.
|
.25mm
|
|
Precision: (VPG G2)
|
+/- .005in.
|
.125mm
|
|
High Precision: (VPG Laser)
|
+/- .002in.
|
.05mm
|
|
Surface Parallelism
|
Commercial: (VPG G1)
|
30 arc minutes
|
|
Precision: (VPG G2)
|
5 arc minutes
|
|
High Precision: (VPG Laser)
|
30 arc seconds or better
|
|
Surface Flatness (Reflection at 632.8 nanometer)
|
Commercial: (VPG G1)
|
2 waves per inch
|
|
Precision: (VPG G2)
|
1/4 wave per inch or better
|
|
High Precision: (VPG Laser)
|
1/10th wave per inch or better
|
|
Surface Quality (per MIL-O-13830)
|
Commercial: (VPG G1)
|
80/50
|
|
Precision: (VPG G2)
|
60/40 or better
|
|
High Precision: (VPG Laser)
|
20/10 or better
|
|
Edge Chips
Specify edge chip not encroach CA (clear aperature) and specify the
max number of chips per surface allowed.
Edge Protection: bevels and chamfers
Specify edge and corner grinding to minimize damage of optical component
during normal handling. Remember to keep tolerances as open as possible to
keep cost of fabrication to a minimum. (+/- .010 in. suggested)
Cosmetics
Stains, fingerprints, residual residue from fabrication. Example:
Optical component shall have no stains observable with the unaided eye.
Remove all finger prints and other surface contamination.
Packaging
Specify that optics shall be individually packaged in such a manner as
to protect all surfaces from damage as the result of shipping and normal
handling.
NOTICE
For our -QUICK TURN- items, VPG reserves the right to substitute optical
glass substrate materials sourced from different manufacturers, as long as
the material properties, optical properties and quality of manufacture meet
or exceed the specifications of the customer's order.
If you require a specific manufacturer's part number, or should you require
certification of the materials used, we will be pleased to do it, but you must
request a CUSTOM order.
Contact VPG
-
Address
-
Volume Precision Glass, Inc.
150 Todd Rd., Bldg 100,
Santa Rosa, CA 95407
-
Phone
-
(707) 206-0100
-
Fax
-
(707) 206-0105
-
Email
-
info@vpglass.com
