Benefiting from a unique high stability manufacturing environment - Optical Surfaces Ltd. has established a reputation for supplying high precision concave spherical mirrors for Schlieren imaging applications involving airflow turbulence, explosive shockwaves, gas leaks and visualisation of transparent thermal phenomena.
Schlieren optics are used to record inhomogeneities within a transparent medium (air, water, glass etc.) by detecting the energy refracted by that portion of the medium in which the inhomogeneity occurs. In a schlieren imaging set-up a source directs light onto a spherical mirror, which collimates the light and redirects it onto a second identical mirror. The resultant image may be captured by an imaging camera or on a screen.
With workshops and test facilities deep underground where temperatures remain constant and vibration is practically non-existent Optical Surfaces Ltd. routinely produces concave spherical mirrors (up to 800mm in diameter) for Schlieren imaging systems in a range of materials including Pyrex, Zerodur and ULE. Experienced optical craftsmen routinely produce spherical mirrors with surface accuracy of better than lambda/10 with particular emphasis on smoothness of the profile. Final characterisation of surface smoothness is undertaken using the knife edge test which is highly sensitive to slope errors. High precision optical surfaces and durable optical coatings (Au, Al/MgF2, AlSiO) combine to provide superior Schlieren image quality.
Optical Surfaces ISO 9001-2000 approved manufacturing facility provides the flexible resources to supply from single specialist requirements to OEM quantities. Benefiting from its stable environment, quality testing becomes quantifiable and reliable. All Schlieren optics are provided with a complete quality test assurance report.
For further information on high precision Schlieren optics please contact Optical Surfaces Ltd. on +44-208-668-6126 / email [email protected] or visit www.optisurf.com