G&H | Artemis (also known as Artemis Optical) is a company that manufactures and designs optical thin-film technologies. Its products include filters, anti-reflection coatings, mirrors, beamsplitters, filter wheel assemblies, cemented optics, conductive window assemblies, etc. The company also offers thin film optical coating, bespoke optical filter design, testing, analysis, and other services. G&H | Artemis caters to the aerospace, defence, security, life sciences, and technology markets.