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Taking advantage of advanced polishing techniques and our high volume manufacturing, VALUMAX® mirrors are truly cost effective. The fine balance between performance and cost has been optimized making these mirrors ideal for OEM applications.
Seven standard metallic and dielectric broadband coatings are available, covering the UV, visible, and IR. These mirrors are available in four diameters — 12.7, 19.05, 25.4, and 50.8 mm (0.5, 0.75, 1.0, and 2.0 in.) with low thermal expansion Pyrex® substrates.
Our AL.2 UV enhanced aluminum coating is a durable, broadband UV reflector with average reflectivity greater than 90% from 250–600 nm. The aluminum film is overcoated with UV transparent magnesium fluoride to prevent oxidation of the metal.
The AL.1 protected aluminum coating is an excellent general purpose broadband visible reflector. The aluminum film is overcoated with a dielectric to increase durability. Average refelectivity is greater than 88% from 400–700 nm.
Our ER.1 enhanced aluminum coating may be used wherever a broadband visible and near infrared reflector is needed. A multilayer dielectric stack deposited over the aluminum film boosts reflectance and improves the durability of the coating. Average reflectivity is greater than 93% from 450–700 nm.
The ER.2 protected silver coating is composed of a low emissivity silver film fully encapsulated by a multilayer dielectric stack to prevent oxidation. This coating has excellent broadband reflectivity in the IR, while maintaining very good performance in the visible and near IR. Average reflectivity is greater than 96% from 480–1100 nm and greater than 98.5% from 1.1–20 µm.
The ER.4 protected gold coating is ideal for applications requiring broadband reflectance in the near IR to the far IR. A multilayer dielectric overcoat provides protection to the gold from oxidation and scratching. Average reflectivity is greater than 96% from 650–1700 nm and greater than 98% from 1.7–2.0 µm.
Our BD.1 coating reflects all visible laser lines in the range 488–694 nm with greater than 99% efficiency for any polarization at 0–45° angle of incidence. And high reflectivity is extended to greater than 98% at 441.6 nm.
The BD.2 coating offers high reflectance for near infrared diode laser applications. Reflectivity is greater than 99% for p-polarization and 98% for s-polarization from 700–950 nm at 0–45° angle of incidence. Greater than 80% average reflectivity at 632.8 nm is also provided to permit easy alignment using a HeNe laser. |
High-precision broadband metallic and dielectric mirrors can be found on Broadband Metallic Mirrors and Broadband Dielectric Mirrors. |
Coatings |
| Coating Type |
Wavelength Range |
Reflectivity |
Angle of Incidence |
Coating Code |
| Broadband Metallic |
| UV Enhanced Aluminum |
250–600 nm |
Ravg >90 % |
|
AL.2 |
| Protected Aluminum |
400–700 nm |
Ravg >88%, Rmin >83 % |
|
AL.1 |
| Enhanced Aluminum |
450–700 nm |
Ravg >93%, Rmin >90 % |
|
ER.1 |
| Protected Silver |
480–1100 nm
1.1–20 µm |
Ravg >96%, Rmin >93%
Ravg >98.5%, Rmin >97 % |
|
ER.2 |
| Protected Gold |
650–1700 nm
1.7–20 µm |
Ravg >96%, Rmin >92%
Ravg >98%, Rmin >96 % |
|
ER.4 |
| Broadband Dielectric |
| Visible |
488–694 nm |
Rs, Rp >99 % |
0–45° |
BD.1 |
| Near Infrared |
700–950 nm
632.8 nm |
Rs >99%, Rp >98%
Ravg >80 % |
0–45°
0–45° |
BD.2 |
|
Specifications |
| Size Tolerance |
+0/-0.13 mm |
| Thickness Tolerance |
±0.25 mm |
| Clear Aperture |
≥central 80% of diameter |
| Chamfers |
12.7–25.4 |
0.25-0.76 mm face width x 45° ±15° |
| 50.8 |
0.38-1.14 mm face width x 45° ±15° |
| S2 Surface |
Ground |
| Durability |
MIL-M-13508C, except ER.4 where hair-line scratches produced by test are acceptable |
| Cleaning |
Non-abrasive method, acetone or isopropyl alcohol
on lens tissue recommended (see Care and Cleaning of Optics) |
| Damage Threshold |
AL.2, 100 W/cm2 CW, 0.3 J/cm2 with 10 nsec pulses at 308 nm, typical
AL.1 & ER.1, 100 W/cm2 CW, 0.3 J/cm2 with 10 nsec pulses at 532 nm, typical
ER.2, 1000 W/cm2 CW, 1 J/cm2 with 10 nsec pulses at 1064 nm, typical
ER.4, 200 W/cm2 CW, 1 J/cm2 with 10 nsec pulses at 1064 nm, typical
BD.1, 500 W/cm2 CW, 1 J/cm2 with 10 nsec pulses within the wavelength range, typical
BD.2, 1000 W/cm2 CW, 2 J/cm2 with 10 nsec pulses within the wavelength range, typical |
|
| Substrate Number |
Dimensions
(mm) |
Thickness
[in. (mm)] |
Material |
Surface Flatness (S1) |
Surface Quality (S1) |
|
| 05SD510 |
12.7 x 12.7 |
0.12 (5.84) |
Pyrex® |
λ/5 |
60-40 |
| 05SD520 |
12.7 x 12.7 |
0.12 (5.84) |
Pyrex® |
λ/10 |
60-40 |
| 07SD510 |
19.05 x 19.05 |
0.18 (4.57) |
Pyrex® |
λ/5 |
60-40 |
| 07SD520 |
19.05 x 19.05 |
0.18 (4.57) |
Pyrex® |
λ/10 |
60-40 |
| 10SD510 |
25.4 x 25.4 |
0.24 (6.1) |
Pyrex® |
λ/5 |
60-40 |
| 10SD520 |
25.4 x 25.4 |
0.24 (6.1) |
Pyrex® |
λ/10 |
60-40 |
| 20SD510 |
50.8 x 50.8 |
0.5 (12.7) |
Pyrex® |
λ/5 |
60-40 |
| 20SD520 |
50.8 x 50.8 |
0.5 (12.7) |
Pyrex® |
λ/10 |
60-40 |
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