Fused Silica Optical Flats

Pricing for Stock Optical Flats
Single Surface, Round: One 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"
($US)
| Thickness
|
| 1" |
133 |
120 |
110 |
0.5" |
| 2" |
202 |
168 |
155 |
0.625" |
| 3" |
366 |
329 |
300 |
0.688" |
| 4" |
535 |
485 |
438 |
0.75" |
| 5" |
794 |
576 |
550 |
0.875" |
| 6" |
1125 |
900 |
795 |
1" |
| 8" |
2340 |
1845 |
1475 |
1.313" |
| 10" |
3475 |
3200 |
2900 |
1.688" |
| 12" |
5625 |
4950 |
4500 |
2" |
Double Surface, Round: Both surfaces are polished to flatness
indicated in table.
| Size Round
| Lambda/20 0.000001"
($US)
| Lambda/10 0.000002"
($US)
| Lambda/4 0.000004"
($US)
| Thickness
|
| 1" |
205 |
150 |
145 |
0.5" |
| 2" |
235 |
178 |
168 |
0.625" |
| 3" |
495 |
440 |
350 |
0.688" |
| 4" |
700 |
600 |
540 |
0.75" |
| 5" |
1080 |
810 |
740 |
0.875" |
| 6" |
1600 |
1350 |
1140 |
1" |
| 8" |
3240 |
2600 |
2100 |
1.313" |
| 10" |
4800 |
3250 |
3900 |
1.688" |
| 12" |
6650 |
5650 |
4950 |
2" |
Most items are ready to ship within one week after receipt of
order. Other sizes and shapes can be made. Call or e-mail us to request
a quote.
Common Specifications
- Material: Fused silica or fused quartz.
- 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..
- Parallelism is typically 4 arc minutes or better, but it is not
guaranteed.
- Scratch-dig is typically 80-50, but it is not guaranteed.
- Parallelism up to 1 arc second and scratch-dig to 10-5 and 5-0 are
available. Contact us to request a quote.
- Each optic is packed in its own storage case.
- *Optional Coating: Contrast-enhancing TiO
coating is available for the 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 coating may enhance the contrast of the fringe pattern, which
would make the fringes easier to see. This coating does not make the
surface more resistant to scratches.
|
The pricing in the tables above are 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, internal defects and striae, 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. |
Some unique optical flats fabricated over
the years:

10"x10" square optical
flat, 1.5 inches thick.

Optical flat in the shape of a ring for measuring the figure
of a flat surface that has a protruding shaft in the middle of it.

Optical flat with a thru-hole.

Custom lambda/4 mirror substrates, 13 inches diameter, 1-inch
thick.
|
 |
 |
|
A 3 inch dia. flat with a 2.5 inch thru-hole. |
A 3 inch dia. flat with a 1.6 inch thru-hole. |

9.5" x 2" rectangular optical flat made from fused silica.
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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