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Mirrors |
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Mirrors
Mirrors are used in a wide
range of beam steering, focusing and collimating applications. RMAX
mirrors utilize multi-layer, dielectric thin films. Laser-Line RMAX
Mirrors are designed for high reflectance at a single laser wavelength.
High power coating designs are standard for select wavelengths. Broadband
RMAX Mirrors provide high reflectance over a broad spectral range.
They are also useful in narrowband applications in which it is necessary
to vary the angle of incidence. Metal Mirrors are intended for applications
involving lower power lasers, or broadband sources. They are less sensitive
to wavelength, polarization and angle of incidence than dielectric mirrors.
Solid Metal Mirrors are well suited for use in high power infrared laser
applications. Copper must be coated with protected gold or silver, because
it oxidizes very rapidly. Molybdenum is generally used uncoated.
It is a very hard material that does
not oxidize, and has high reflectance above 3 µm. Substrates are available
with plano/plano, plano/concave and plano/convex surfaces. Refer to
the THIN FILM COATING section for coating information and specifications.
RMI STANDARD
SPECIFICATIONS
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Angle incidence:
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0º
or 45º
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| Materials: |
BK7, UVFS, SFS,
Pyrex, Zerodur,
Si, Cu, Mo, CaF2, |
Surface Figure:
BK7, UVFS, SFS:
Pyrex, Zerodur:
Si, Cu, Mo:
CaF2:
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Plano [Concave/Convex]
λ/20 [λ/10]
at 632 nm
λ/20 [λ/10]
at 632 nm
λ/40 [λ/20]
at 10.6 µm
λ/4 [λ/2]
at 632 nm
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Surface Quality:
BK7, UVFS, FS:
Pyrex, Zerodur:
Si*, Cu*, Mo*:
CaF2:
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Commercial polish, S2
* Fine grind, S2
10-5
10-5
40-20
20-10
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| Diameter Tolerance: |
+ 0.000", – 0.010" |
| Thickness Tolerance: |
± 0.010" |
| Radius Tolerance: |
± 0.5% |
| Wedge: |
< 3 arc minutes |
| Bevels: |
0.010" – 0.030" at 45º |
| Clear Aperture: |
Central 85% of diameter |
| Reflectance: |
± 0.5% |
| Laser-Line RMAX: |
R > 99.7% at 0º
R > 99.4% at 45º, unpol. |
| Broadband RMAX: |
Ravg > 99% at 0º
Ravg > 98.5% at 45º |
| Metals: |
Refer to tables in THIN
FILM COATINGS section |
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[Note: Thicknesses listed are exact for plano/plano
substrates. For plano/concave and plano/convex substrates, center
thickness (CT) depends on the radius of curvature.] |
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Last Updated ( Friday, 27 April 2007 )
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Due to their potential strategic high value, export of RMI products and related technical data may be subject to U.S. or other export licensing requirements.
Please consult your export control administrator or contact RMI for more information.
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