Optical Coatings for EST Monitoring

Elevated Skin Temperature or EST monitoring, is an extension of the field of infrared thermography applied to measuring skin temperature. The lenses used in IR cameras for EST monitoring demand high-performance Anti-Reflective (AR) optical coatings to deliver the best image quality and ensure accuracy of results.

EMF offers an innovative portfolio of precision custom and high-volume HEAR (High Efficiency Anti-Reflective) and DLC (Diamond-Like Carbon) coatings on most IR substrates including Germanium (Ge), Silicon (Si), Zinc Selenide (ZnSe), Zinc Sulfide (ZnS) and Chalcogenides.

Getting an optical coating right requires a unique blend of broad capabilities and deep technical know-how. EMF’s 26 coating chambers gives it an unrivaled capacity to coat 40M square inches.

Infrared Coating Capabilities


0.9 – 2.7μ

3 – 5μ

7 – 14μ
3 – 14μ
Zinc SelenideCheckmarkCheckmarkCheckmarkCheckmark
Zinc Sulfide (MS)CheckmarkCheckmarkCheckmarkCheckmark
Calcium FluorideCheckmarkCheckmark
IRG26, IG6, As40Se60

Spectral Performance Charts

Typical Refelctivity of HEAR on Germanium

Rx = 0.27%

Avg. Reflectivity per surface
HEAR on Ge (8-12μ)

DLC Spectral Performance on Ge (8-12microns)

Rx ≤ 0.3%
Tx ≥ 98.0%

Typical on Ge, ZnSe, ZnS-MS and CHALCOGENIDES at near normal AOI

Typical Transmission DLC on Germanium

Tx Exceeds Industry Goals

DLC-HEAR on Ge (8-12μ)

In-house Metrology and Testing

EMF houses a wide range of in-house metrology for precise measurement of transmission and reflection in optics from UV to FIR at near normal and various angles of incidence (AOI). Additionally, its in-house metrology and testing equipment is duplicated across 2 different facilities offering redundancy and risk mitigation.

  • Agilent Cary 7000 UV-VIS-NIR
  • Perkin-Elmer Frontier Optica FT-IR
  • Perkin-Elmer Lambda 950 UV-VIS-NIR
  • Perkin-Elmer Lambda 2
  • Moderate-Severe Abrasion
  • Adhesion (slow-fast pull)
  • Cleanability
  • Water/Salt Solubility: 24hrs
  • Immersion
  • Humidity Cycle: Min. 24hrs
  • Thermal Cycle: Min. 24hrs
  • Salt Fog: Min. 24hrs
  • Sand-Slurry Wiper: 5,000 revs
  • Zygo 6″ Verifire Interferometer
  • Dektak Profilometer
  • Transmitted Wave-front Error 10.6µ (TWE)
  • Atomic Force Microscope (AFM)
  • MIL-C-48497: Minimum quality and durability requirements for single layer and multi-layer interference coatings used within the protective confines of sealed optical systems.
  • MIL-F-48616: Establishes general performance and durability requirements for this film coated optical elements which are used in the spectral region from 0.7 um to 50.0 um.
  • MIL-PRF-13830B: Covers the manufacture, assembly and inspection of finished optical components such as lenses, prisms, mirrors, reticle windows and wedges for fire control instruments.
  • MIL-M-13508C: Covers a mirror coating consisting of a deposited aluminum reflective film overlaid with a transparent dielectric protective film applied on the front surface of optical elements.
  • MIL-C-675C: Establishes the minimum optical and durability requirements for magnesium fluoride interference films used as anti-reflection coatings on optical materials.
Agilent Cary 7000
Agilent Cary 7000
Perkin Elmer Lambda 2
Perkin Elmer Lambda 2
Perkin Elmer Frontier Optica
Perkin Elmer Frontier Optica
Zygo Interferometer
Zygo Interferometer
Perkin Elmer Lambda 950
Perkin Elmer Lambda 950
Thermal Imaging

Need Your EST Optics Coated?

Discover the EMF Edge

99% product quality
99% on-time delivery
99% inquiries answered within 60 minutes
24hr available turnaround
ZERO wait time with chamber reservation

Continuous Innovation

EMF Innovation Timeline

Customer Voices

EMF has been an excellent vendor for us in a (coatings) world where we’ve had almost nothing but mediocre to abysmal vendors.


Precision Optical

Thank you for the unparalleled service. Hard to find quick turnaround from quality shops these days. This will definitely help with our decision making moving forward.


It is always preferable to use a DLC process that coats up to ensure virtually pinhole free coatings.

Jadranka Lakic-Reljic
Principal Optical Quality Engineer
DRS Technologies

EMF’s Custom-Designed DLC Chamber Coats Up To Achieve Virtually Zero Pinholes

Serving Industry Leaders

Rochester Precision Optics
Collins Aerospace
Janos Technology

Optical Coatings for EST Optics

With 26 coating chambers and an unrivaled 40M square inches of coating capacity you can rely on EMF to be your dependable and reliable partner for providing high-volume optical coatings for Elevated Skin Temperature (EST) monitoring.

Thermal Imaging

Need Optical Coatings for Infrared Thermography?

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