Posts on this page of our Blog relate to products and information from Apre Instruments.
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To measure prisms and substrates with a laser interferometer, you are typically forced to paint or tape surfaces. Time is wasted, parts damaged, and accuracy degraded. Spectrally Controlled Interferometry (SCI) directly measures these parts down to 150 µm OPL ((or even 75 µm on special request). No taping, no painting…just measure. SCI is simply faster and more … Continue reading
An essay from Apre Instruments describes the multiple methods used today to measure an optical surface radius: Test plates Mechanical probe Interferometer “Cateye to Confocal” The essay then discusses the benefits of Apre’s Spectrally Controlled Interferometry (SCI) measurement method, including: Easy alignment in laser mode Electronically switch to white light mode to isolate fringes to … Continue reading
Optical index homogeneity is an important material parameter influencing lens performance. Laser interferometers have painstakingly measured this parameter which requires four separate measurements. Laser interferometers have either required the use of contact plates with oft times poisonous index matching fluids or polishing a wedge into the test part to isolate the front from the back … Continue reading
New zoom imaging interferometers are based on the same design as 40-year-old systems. So upgrading to the latest camera and computer systems offers the same performance as a new system at ~⅓ the cost. Äpre has saved their customers over $2,000,000 enabling them to invest and grow their businesses. An upgrade provides you with the … Continue reading
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
