Posts on this page of our Blog relate to products and information from Apre Instruments.
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Dome optics are the last component in a growing number of imaging and guidance applications. Domes protect the imaging optics from the surrounding environment without degrading optical performance. Therefore the dome’s transmitted wavefront quality is important to control since it directly influences the final image quality. Dome applications include: Underwater cameras Submersibles for robotic and manned … Continue reading
Prism assemblies are difficult optical elements to measure. Back reflections from multiple surfaces and multiple channels make laser interferometry incapable of making these measurements. Spectrally Controlled Interferometry (SCI), available from Apre Instruments, offers an easy-to-use, accurate method to measure these components for the first time. A laser light source interferometer (for example a laser Fizeau) … Continue reading
Prisms are complex optical components. Transmitted wavefront performance is controlled by multiple surfaces, the angle between them, and the material’s homogeneity. Spectrally Controlled Interferometry (SCI) available from Apres Instruments enables their S-series interferometers to make prism measurement fast, easy and more accurate than conventional methods. SCI simplifies and speeds up the measurement process for S1 and … Continue reading
Total Thickness variation (TTV), and often wedge, is a specification of optical windows and substrates. There are two methods for measuring TTV: Front-to-Back (left image above) and Direct (right image above). Both methods utilize Fizeau interferometers, a product line of Äpre Instruments. Front-to-Back Measurement TTV can only be calculated if the front and back … Continue reading
Äpre Instruments teamed with Zack Hobbs of Sydor Optics to present an article in the Photonics Spectra on-line journal. This article describes Spectrally Controlled Interferometry (SCI) and some of its emerging uses, such as measuring optical elements. To read the article, click here. To request more information or a quotation for Apre products, contact IL … Continue reading
Fizeau Interferometry without Back Reflections! Do confused interference fringes frustrate your ability to make plates and prisms? Finally there is a better way, without the hassle of painting, greasing or taping the back surface. a better way, without the hassle of painting, greasing or taping the back surface. Äpre’s Spectrally Controlled Interferometry (SCI)-based interferometers align … Continue reading
