Precision optical components and custom assemblies (mirrors, lenses, prisms, beamsplitters, polarizers, filters) using ion‑beam sputtered thin films and superpolished substrates for low‑loss, spectrally accurate, high‑durability, laser‑damage‑resistant performance. Helium–Neon and stabilized lasers plus design‑to‑concept/build‑to‑print OEM laser assemblies for instrumentation, metrology and other performance‑critical applications requiring long coherence and high amplitude stability.