# Optical Coating Cost Estimating for AR, HR and Bandpass Coatings > Source: https://netray.co/resources/optical-coating-cost-estimating-ar-hr-bandpass > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Knowledge Base ## Short answer How to estimate optical coating cost: chamber loading, layer count, deposition method, witness samples, rework risk and testing for AR, HR and filter coatings. ## Category ai-automation ## Content **Intro:** Optical coating cost is driven by chamber time per run, how many parts fit on the fixture, layer count and thickness, deposition method, and the chance of a failed run. A simple single-wavelength anti-reflection coating on a full planetary load can be cheap per piece, while a broadband or high-reflector design on a few large optics can cost more than the polished substrate. Estimating well means pricing the run, not the part, and being honest about rework. This guide covers the inputs coating estimators actually use. **Sections:** #### Price the Run, Then Divide by Pieces **Body:** Coating is a batch process, so the first question is how many pieces ride in one run. Chamber diameter, planetary or dome tooling, part diameter and the need for a witness sample decide load. Cost per run includes pump-down and cycle time, source materials, operator time, fixture preparation, cleaning and a spectrophotometer check. Mixed loads help utilization, but only when the parts share a process: different substrate temperatures or different coating materials usually cannot share a run. A single large mirror may consume an entire run, so its coating cost is the cost of the run. **Bullets:** - Parts per fixture and fixtures per run - Chamber cycle time including pump-down and cool-down - Cleaning, fixturing and demounting labor - Witness samples and in-chamber monitoring #### Design Complexity: Layers, Bandwidth and Materials **Body:** A V-coat for one laser line may need only a few layers. A broadband AR across visible and near-infrared, a dielectric high reflector, a dichroic beamsplitter or a narrow bandpass filter can need dozens or more layers with tight thickness control. More layers mean longer runs and more sensitivity to error. Material choice matters too: some oxide and fluoride combinations are routine, while exotic materials, infrared coatings on germanium or zinc selenide, or coatings with demanding laser-induced damage requirements need special sources, cleaner processes and more engineering time. #### Deposition Method Changes the Math **Body:** E-beam evaporation with ion assist is a common workhorse for general optics. Ion beam sputtering and similar dense-film processes tend to run slower and cost more per run, but they are used when spectral precision, low scatter or high damage threshold justifies it. Make sure the quote states the process, because a customer asking for a spec that only a dense-film process can meet cannot be served at evaporation pricing. If you outsource coating, ask the partner for run-based pricing and minimum lot charges, then add your own handling, shipping and risk of in-transit damage. #### Rework, Stripping and Failed Runs **Body:** Not every run passes on the first try. Spectral shift, adhesion failure, haze or particulate defects may require stripping and recoating, and stripping can damage soft substrates or sensitive polish. Price a probability of rework using your own history, and decide up front who pays for a failed run caused by an out-of-spec substrate or unclear drawing. For development coatings with unproven designs, quote engineering time separately from production runs and state that performance targets are goals until verified on witness samples. #### Testing and Documentation Add Real Cost **Body:** Customers may ask for spectral curves on every lot, adhesion and humidity testing to a MIL-type durability spec, abrasion testing, or laser damage testing to an ISO method. Each carries sample cost, lab time and paperwork. Include a certificate of conformance and the data format the customer expects. If your quoting process cannot show what tests were included, the estimator will discover later that the customer assumed a full test package at no charge. When the volume is small and the coating is a standard catalog design, a price list by design and diameter is usually enough without detailed estimating. **Cta:** Netray can index your past coating runs, load sizes, rework history and test costs so a draft coating estimate comes from your actuals instead of memory. Ask for a short on-prem demo. **Faq:** #### How much does an optical coating cost? **Answer:** There is no single number. Cost depends on parts per run, layer count, deposition method, substrate material and test requirements. A routine AR coating on a full load can be a small per-piece charge, while a complex multilayer on a few large optics can be dominated by the cost of the run itself. Request pricing by run if possible. #### Why do coating quotes have minimum lot charges? **Answer:** Because a chamber run costs roughly the same whether it holds one part or a full load. Pump-down, source use, operator time and verification are largely fixed per run. Minimum charges protect the coater from running a nearly empty chamber for a single piece. #### Is it cheaper to coat in-house or outsource? **Answer:** It depends on utilization. In-house coating wins when you keep the chamber loaded with compatible work and control lead time. Outsourcing wins for low volume, exotic designs or processes you do not own. Compare full cost, including handling, shipping, scrap risk and schedule delays, not just the vendor price. ## Related Slugs - why-machine-shop-quotes-win-but-lose-money - plating-job-shop-quoting-software - plating-line-scheduling-rack-and-tank-capacity - machine-shop-quoting-software ## Search terms optical coating cost, anti-reflection coating pricing, coating cost estimating optics, thin film coating quote, optical coating chamber capacity, dielectric coating cost --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json