Production and certification of aspherical surfaces in ASTROHN Technology Ltd
As is known, no modern high-tech optical system can do without aspherical elements. The manufacture and certification of aspherical surfaces are the most time-consuming and, therefore, limiting stages of the process.
Our equipment provides high-precision aspheric grinding with a spherical diamond tool with an accuracy of 1 µm PV and polishing with a pneumatic membrane tool with a polyurethane working part.
We always strive to optimize processes to provide our customers with thermal imaging cameras on time and at the best price. In particular, to increase the processing speed of overall aspherics, we purchased and tested a FEM tool with an increased radius of curvature R20 versus R10 with a standard tool. This made it possible to increase the contact spot from 2–3 to 5–6 mm and, accordingly, led to a decrease in the treatment cycle by 1.3–1.5 times.
In the future, we expect to divide the aspherical processing operations into preliminary and finishing with the use of tools of different curvature. Work on reducing production time and improving the quality of our products continues!