Contrast-Enhancing TiO Coating
Contrast-enhancing TiO coating is available for
all single-sided flats. If you would use an optical flat in contact
testing and the part to be tested has a flat or matte finish, this
additional coating
may enhance the contrast of the fringe pattern, which would make the
fringes easier to see. This coating does not protect against
scratches. Coated surface is polished to
flatness indicated in table. Other surface has "commercial polish" which means
it is clear but flatness is unspecified.
| Size Round
| Lambda/20 0.000001" ($US)
| Lambda/10 0.000002" ($US)
| Lambda/4 0.000004" ($US)
| Additional Cost for Coating ($US)
| Thickness
|
| 1" |
108 |
95 |
85 |
45 |
0.5" |
| 2" |
185 |
150 |
135 |
60 |
0.625" |
| 3" |
360 |
320 |
300 |
80 |
0.688" |
| 4" |
470 |
430 |
410 |
85 |
0.75" |
| 5" |
710 |
520 |
480 |
115 |
0.875" |
| 6" |
965 |
835 |
725 |
160 |
1" |
| 8" |
1890 |
1620 |
1475 |
395 |
1.313" |
| 10" |
3060 |
2790 |
2700 |
495 |
1.688" |
| 12" |
4950 |
4500 |
4275 |
725 |
2" |
Common Specifications
- Material: Substrate-grade fused silica.
- Tolerance of diameter and thickness: +/- 0.060 inches.
- Typical surface roughness is 5 Angstroms RMS.
- Flatness values are Peak-to-Valley where Lambda=633 nm.
- Measurements are NIST-certified.
- Each optic comes in a finely-crafted, wood storage case.
|
The pricing in the
table above is for optical reference flats that are designed to be used in
surface contact testing, or as front surface mirrors (if appropriately
coated). They are not designed to be used as high-precision windows (where
you are using the light that transmits through the optic, not just reflects
off one surface of it). Although they may work well as windows for some
applications, parameters affecting their use as windows such as parallelism
(typically 3 arc minutes or better), internal defects and striae (typically
40-20 scratch-dig or better), and transmitted wavefront accuracy are
generally of good quality, but they are not held to any specific value. If
you are looking for high-precision windows where you need to hold the
transmitted wavefront accuracy to a specific value, call or e-mail for a
quote. |
Back to Uncoated Optical Flats
Please check out our
Optics Cleaning Kit.
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Custom Scientific, Inc.
3852 North 15th Avenue
Phoenix, Arizona 85015 USA
Phone: 602-200-9200
Fax: 602-200-9206
optics@CustomScientific.com
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