At OptoSigma, we understand the importance of high performance and stable optical coatings. We have
extensive design, process development, and manufacturing experience for a large variety of optical thin
film applications. From Bio-Tech dichroic filters, to Bio-Medical high laser damage threshold AR or HR
coatings for laser delivery systems, to space rated optics for flight applications, we have the
experience and expertise required for the most demanding environments.
Over One Hundred Standard AR and HR Coating Designs to Choose From
Specializing in High Laser-Damage Threshold Coatings
Quick Turnaround for Both Custom and Standard Coatings
Provide Custom Tooling to Hold and Mask Based Upon Your Requirements
Wavelength Range from: 220nm – 2500nm
Coating Substrate Sizes from 3 to 400 mm
Custom Design and Process Development Experts!
Above is a list of our standard AR and HR coating designs to choose from. We encourage you to specify any one of
these coatings by selecting one of our uncoated optics, or, sharing details about your optics that need to be
coated. Either way, we can accommodate and discuss your requirements including performance, price and delivery!
Just complete the basic information and submit your request. Our team will follow up promptly to discuss your
request and provide a quotation. Don’t have time? Simply email us direct and let us know what you need. We can
do the legwork for you!
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.
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.
Optical Fiber Endfacesr
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: R<0.1% per surface at designated wavelength V
Coating: ( λ<325nm) R<0.5% per surface at designated wavelength V Coating: ( λ>325nm) R<0.25% per
surface at designated wavelength Multiband AR: R<0.25% per surface at designated wavelengths
Broadband AR: R<0.6% per surface over the designated range MgF2 AR: 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.
High Reflection 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.
Specifications & Tolerances
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
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
Custom Optical 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
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.
Broadband All Dielectric
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.
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.
Substrate material: BK7 Grade AAngle of incidence: 45±5degrees %T p >98: 780nm / %T s <1.0: 780nm
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 AAngle of incidence: 45 degrees