THIN FILM COATINGS
Spherical Lenses
Coatings
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
•
•
•
•
•
Ion Assisted Deposition (IAD) process
Advance Plasma Source (APS) plasma-ion assisted Deposition
Anti-Reflection Coatings
High Reflection Coatings
Coatings on Optical Fibers
OptoSigma supplies a wide
selection of optical thin film
coatings. These coatings are often
provided as part of the ­optical
component but they may also be
ordered separately to be applied to
an uncoated element. For ­example,
it is possible to apply an AntiReflection coating to any uncoated
lenses, windows or optical fibers.
Also reflecting coatings may be
applied to uncoated substrates to
form mirrors or partial reflectors. To
make this process simple we have
­listed some of our most common
­standard coatings. To order you
simply append the coating suffix to
the base part number and ­specify the
surfaces to be coated. If you don’t find
the exact coating you need please ask
us to provide you with a custom solution. Our coating engineers will use the latest design
software and production ­techniques to provide you with the coating you require.
Optical thin film coatings are
used to control the intensity,
wavelength selection and
polarization characteristics
of incident electro-magnetic
radiation. For laser and
precision optical applications
the quality of the coating is
critical. Coatings must be
precise as well as durable
and damage resistant.
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14
OptoSigma’s advanced IAD
and advanced plasm source
(APS) coating facility in
Santa Ana, California is able
to supply high performance
laser coatings covering
the optical spectrum
from 190 to 3000nm.
THIN FILM COATINGS
Spherical Lenses
Anti-Reflection Coatings
Coatings
Anti-Reflection Coatings
•
•
•
High Reflection Coatings
Lenses
Windows
Optical Fiber Endfaces
Custom Coatings
We offer a wide range
of Anti-Reflection
coatings which may be
applied to any of our
glass or fused silica
lenses or windows to
reduce reflection losses.
Through use of our Ion
Assisted Deposition (IAD)
process we also specialize in AR coatings
on optical fiber endfaces. Low temperature
IAD coatings may be applied to most fiber
endface terminations. Pre and post
coating inspection is performed in our
dedicated facility to ensure high quality.
Our “Super-V” Coatings represent the
ultimate in low reflection coatings
(R<0.1%) for narrowband applications.
We also offer laser line V Coatings,
Broadband Multilayer AR Coatings,
Multiband AR Coatings,
Telecom AR Coatings and
Single Layer AR MgF2 Coatings.
Standard coatings may be
ordered by simply appending a
coating suffix to the product
number and specifying the number
of sides to be coated. For more complex
requirements we suggest that you call - our applications
engineers will be pleased to advise you on the best coating for your needs.
Standard Anti-Reflection coatings are listed in the following table.
Specifications & Tolerances
On BK-7 Substrates:
Super V:
V Coating: ( ­λ<325nm)
V Coating: ( λ>325nm)
Multiband AR:
Broadband AR:
MgF2 AR:
R<0.1% per surface at designated wavelength
R<0.5% per surface at designated wavelength
R<0.25% per surface at designated wavelength
R<0.25% per surface at designated wavelengths
R<0.6% per surface over the designated range
R<2.5% per surface over the designated range
Durability and Laser damage threshold depend on the substrate so please see the later
sections of this catalog for these specifications. The curves on the following pages show
typical single surface reflectance for each of the specified coating types.
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15
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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16
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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17
THIN FILM COATINGS
Spherical Lenses
5
Coatings
Anti-Reflection Coatings
4
High Reflection Coatings
3
Custom Coatings
R
(%)
2
1
0
400
600
800
1000
NEAR IR BROADBAND
ANTI-REFLECTION COATING
1200
1400
1600
1800
A59 (600-1600 nm)
OptoSigma coatings are
manufactured
using Ion Assisted
Deposition (IAD)
technology yielding
highly densified
coatings with extremely
low losses and high
laser damage
thresholds.
Anti-Reflection Coatings (Continued)
Type
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18
Super
Super
Super
Super
Super
Super
Super
Super
Super
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Wavelength
Range, λ0
(nm)
Reflectivity
per Surface
(%)
633
670
780
830
980
1012
1064
1310
1550
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
V33
V36
V40
V43
V44
V45
V46
V48
V49
193
248
266
281
308
325
<0.5
<0.5
<0.5
<0.5
<0.5
<0.25
A03
A04
A05
A06
A07
A08
Minimum
Price per Side
1-9 Pieces
Price per Side
≥ 10 Pieces
Coating
suffix
THIN FILM COATINGS
Spherical Lenses
Anti-Reflection Coatings (Continued)
Type
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coat
Coatings
Wavelength
Range, λ0
(nm)
Reflectivity
per Surface
(%)
337
352
355
351-364
405
416
428-441
476-488
514
521-532
543
594
612
633-635
670-694
750
780
830
905
980
1064 (1047-1080)
1150
1310
1540-1550
2060-2100
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
<0.25
A11
A13
A14
A15
A18
A16
A17
A19
A22
A26
A28
A30
A31
A33
A36
A39
A40
A41
A43
A44
A46
A47
A48
A49
A50
Minimum
Price per Side
1-9 Pieces
Price per Side
≥ 10 Pieces
Coating
suffix
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
Multiband
Multiband
Multiband
Multiband
AR
AR
AR
AR
510-530 & 745-765
633 &1064
532 &1064
266 & 532
<0.4
<0.25
<0.25
<0.5 & <0.25
A57
A77
A78
A79
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
AR
AR
AR
AR
AR
AR
AR
AR
AR
AR
AR
240-360
360-532
425-675
525-975
600-900
600-1600
670-1100
850-1500
800-1200
1100-1600
2600-3000
<0.5
<0.6
<0.6
<1.0
<0.6
<2.0
<0.6
<0.6
<0.6
<0.6
<0.6
A51
A52
A55
A56
A58
A59
A62
A63
A66
A67
A69
MgF2
MgF2
MgF2
400-700
650-1250
1100-1600
<2.5
<2.5
<2.5
A88
A89
A99
Telecom AR
Telecom AR
Telecom AR
1260-1650
1300 & 1550
1500-1630
<0.4
<0.25
<0.1
A92
A93
A95
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For components over 55mm diameter the price per surface will be doubled. For quantities
in excess of 20 pieces ask for our discounted prices.
19
THIN FILM COATINGS
Spherical Lenses
High Reflection Coatings
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
We offer narrowband and broadband dielectric high reflecting coatings as well as a range
of metal coatings. Laser Line HR Coatings are offered for all major laser wavelengths
in the range of 193 to 2100nm. Broadband HR Coatings are offered for a selection of
bandwidths. They provide a very high degree of spectrally neutral reflection and
represent the ultimate in optical mirror coatings. Most of the coatings listed are for use at 45
degrees angle of incidence, but we do offer a selection of Broadband, Normal Incidence
HR Coatings. Other normal incidence coatings can be provided on special request.
Metal coatings, such as Protected Aluminum, Protected Silver or Protected Gold
provide reflectance over an extremely broad spectral range. These coatings are
protected by a thin layer of dielectric material in order to make them durable. It is also
possible to enhance the performance of metal coatings by adding several dielectric layers
over the metal coating.
Specifications & Tolerances
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Narrowband Laser HR: ( λ=193nm) Rav >95% for 45° incidence at designated wavelength
Narrowband Laser HR: ( λ>193 and <300nm) Rav >95% for 45° incidence at designated wavelength
Broadband HR:
(45°AOI)
Rav >99.0% for 45° incidence over designated bandwidth
Protected Aluminum:
Rav >88.0% from 400 to 2000nm
Enhanced Aluminum:
Rav >94.0% from 400 to 700nm
Protected Silver:
Rav >96% from 400 to 2000nm
Enhanced Silver:
Rav>97.5% from 400 to 700nm
Protected Gold:
Rav >96% from 650nm to >20µm
Durability and Laser damage threshold depend on the substrate so please see the product
sections of this catalog for these specifications.
The curves show typical average reflectivity for a selection of our standard coatings.
20
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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21
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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22
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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23
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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24
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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25
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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26
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
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27
THIN FILM COATINGS
High Reflection Coatings
Spherical Lenses
Coatings
Type
Anti-Reflection Coatings
Wavelength
Range
(nm)
Reflectivity
per Surface
(%)
Minimum
Price per Side
1-9 Pieces
Price
per Side
≥ 10 Pieces
Coating
suffix
High Reflection Coatings
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Laser
Custom Coatings
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
193
248
266
281
308
325
335
337
345
352
355
405
532
543
594
632.8
670-694
780-905
980-1012
1064
1550
2060-2100
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
Broadband
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
HR
420-480
480-540
630-700
425-675
420-540
540-650
600-900
770-830
730-900
570-640
700-1000
800-1200
1100-1600
>99.5
>99.5
>99.5
>99.0
>99.0
>99.0
>99.0
>99.5
>99.0
>99.5
>99.0
>99.0
>99.0
avg
avg
avg
avg
avg
avg
avg
avg
avg
avg
avg
avg
avg
R52
R53
R54
R55
R56
R57
R58
R59
R60
R61
R62
R66
R67
400-2000
400-2000
650-IR
250-400
400-700
400-2000
>97.5
>96.0
>96.0
>85.0
>94.0
>88.0
avg
avg
avg
avg
avg
avg
R77
R78
R79
R87
R88
R89
Enhanced Silver
Protected Silver
Protected Gold
UV Enhanced Aluminum
Enhanced Aluminum
Protected Aluminum
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>95.0
>99.0
>99.0
>99.0
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
>99.5
R03
R04
R05
R06
R07
R08
R09
R11
R12
R13
R14
R16
R26
R28
R30
R33
R36
R42
R45
R46
R48
R50
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
Line
THIN FILM COATINGS
Spherical Lenses
Custom Optical Coatings
Coatings
Anti-Reflection Coatings
•
•
•
•
•
•
•
•
High, partial, and anti-reflection
Edge, notch, band pass filters
Plate and cube beam splitters
Wavelength ranges 190 – 2500nm
Sizes up to 10 x 10 inches
Various angle of incidence and polarization requirements
OptoSigma and customer furnished materials
Optical glasses, crystals, polymers, fibers, fiber assemblies, and cemented substrates
High Reflection Coatings
Custom Coatings
Here at OptoSigma we specialize in custom optical coatings from the ultra-violet to the
near infrared. Every day we provide a variety of custom coatings from simple
modifications of the catalog specifications to entirely specialized designs.
If the custom coating design is straightforward, we will perform a single test run
immediately before the production run. For more complicated designs, a development
process will be needed to establish the specifications which can be met in a production
environment. This could potentially include multiple test runs, design modifications, and
data analysis. We work closely with our customers through every step in the process to
determine which specifications are suitable for both their applications and a manufacturing
environment. It is in the best interest of OptoSigma and our customers to get through
the development stage and on to production as quickly as possible. Once production is
reached, the specialized processes and inspection are documented and established to
ensure ongoing success.
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29
THIN FILM COATINGS
Spherical Lenses
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
Most of our coatings are deposited using a computer controlled electron beam ion
assisted deposition process allowing us to provide durable precision all dielectric coatings.
Before coating, the substrates are ion cleaned to decrease surface contamination,
which helps the coating bind to the substrate. During coating, these energetic ions
help densify the coating which both increases the coatings optical performance and
reduces the internal stress thus increasing the durability. Because of this process, we
are able to maintain a temperature of less than 100°C to accommodate temperature
sensitive substrates, such as optical fibers, fiber assemblies, crystals, select polymers,
and cemented optics. Additionally, each chamber is equipped with a Polycold system to
aid in the pumping of water vapor, which decreases the time required to coat and helps
eliminate the moisture within the coating. The coating process is completely computer
controlled and monitored by a technician. The final product is an extremely dense durable
precision coating.
The substrates are mounted on a planetary system, where each planet measures
15 inches in diameter. In addition to the availability of a wide range of tooling, we have
the ability to both aid the customer in the designing process, or to provide complete
custom tooling to accommodate their parts.
Durability/Low Stress
Coatings with a high internal stress have a tendency to craze and delaminate or deform
the substrate increasing the wavefront error. Our ion assisted process minimizes this
stress within each coating layer, and our designs are created to balance the stress over
the entire coating. The ion cleaning process prior to coating enhances the adhesion of
the coating to the substrate, increasing the durability and longevity of the coating. During
coating, the ion bombardment minimizes internal stress build up by increasing the
homogeneity within the layers. The final product is an extremely durable coating which
maintains the original substrate wavefront error.
High Damage
To produce a coating, which can withstand high levels of incident laser energy, the
appropriate design and process must be used. Our ion assisted deposition process
produces coatings which are highly homogeneous, dense and completely oxidized.
Reducing the inhomogenaities minimizes the internal scattering and increases the thermal
conductivity of the coating. Our designs for high damage use all oxides rather than
fluorides and metals which reduce the amount of absorption within the coating.
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Temperature Sensitive Substrates
The energy required to produce highly homogeneous and dense coatings comes from our
ion assisted process rather than temperature. During our coating runs we can maintain
a temperature below 100°C. This allows us to produce precision coatings on a variety
of temperature sensitive substrates, such as polymers, optical fibers, fiber assemblies,
cemented substrates, and a variety of specialized crystals.
If you do not find the coating specifications you need in our catalog, please call with your
request.
30
THIN FILM COATINGS
Broadband All Dielectric
Spherical Lenses
Coatings
Anti-Reflection Coatings
All dielectric multi-layer coatings are much more durable and of higher optical
performance that those which involve metals. These can be offered with almost zero
absorption and reflectivities greater than 99%. The all dielectric design is limited to a
specific spectral bandwidth around the center design wavelength. Large bandwidth
requirements demand the use of high precision coatings. These types of coatings are
performed regularly at OptoSigma. Two actual spectral curves demonstrating this type of
coating can be seen in the following plots.
High Reflection Coatings
Custom Coatings
Anti-Reflection
Specifications
& Tolerances
Substrate material:
BK7 Grade A
Angle of incidence:
0 degrees
%R <0.3:
1250-1650nm
High Reflector
Specifications
& Tolerances
Substrate material:
BK7 Grade A
Wide Angle
Angle of incidence:
0 degrees
%Rave >97.0:
400-1000nm
Particular applications demand the use of all dielectric coatings due to their durability and
superb optical performance. The all dielectric design is however highly sensitive to
angular variation, which can create problems for broadband applications involving large
angular variations, such as those with non-collimated beams or rotating substrates. To
accommodate the need for angular variation, a coating bandwidth substantially greater
than the source bandwidth is required. This requires a highly precise all dielectric coating.
Two actual spectral curves demonstrating our capabilities follow.
Reflector
Specifications
& Tolerances
Substrate material:
BK7 Grade A
Angle of incidence:
40±15degrees %Rave >98.0:
450-650nm
Cube
Specifications
& Tolerances
Substrate material:
BK7 Grade A
Angle of incidence:
45±5degrees %Tp >98: 780nm
%Ts <1.0: 780nm
31
THIN FILM COATINGS
Spherical Lenses
Filters
Coatings
Anti-Reflection Coatings
High Reflection Coatings
Custom Coatings
Many standard types of custom filters, such as short wave pass, long wave pass, multiple
notch, and band pass filters are manufactured at OptoSigma. In addition, a variety of
highly customized coatings which do not fall into a general category are produced
regularly at OptoSigma. Our engineers design to the specific targets established by our
customers’ needs. The designs are then tested in our chambers and we work closely
with our customers to arrive at a final manufacturable coating. Two actual spectral curves
demonstrating our capabilities follow.
Specifications & Tolerances
Substrate material: BK7 Grade A
Angle of incidence: 45 degrees %T <3.0: 532nm
%T >85: 488, 632.8, and 1064nm
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Specifications & Tolerances
Substrate material: BK7 Grade A
Angle of incidence: 0 degrees Region 1: %T <5.0: 425-525nm Region 2: %T >90: 590nm
Region 3: %T = 20±10: 670nm
Region 4: %R >99.0: 1064nm
If you do not find the coating specifications you need in our catalog, please call with your
request.
32