Edmund Optics has added a range of calibration grade precision aspheric lenses to its Techspec product line. According to the company, these high numerical aperture (NA), off-the-shelf polished aspheric lenses offer the ultimate in performance and precision technology.
The calibration grade lenses offer an improved aspheric surface figure, surface quality, and centring specification when compared to the company's regular precision aspheric lenses; they provide an impressive aspheric surface accuracy of 0.25µm RMS. The uncoated lenses are available in 25mm and 50mm diameters, with NA of 0.50 and 0.66, making them well suited to R&D and OEM applications. These high NA lenses are excellent for improving the efficiency of low light level detection systems or for applications requiring a compact optical path, where space is at a premium.
Techspec Calibration Grade Precision Aspheric Lenses are individually serial numbered, and are offered with a complete metrology data package. This test data package includes a surface profile performed on a precision Taylor Hobson Talysurf Profilometer, an interferogram of the spherical surface, and tested values for diameter, centre thickness and centring. Custom designed calibration grade precision aspheric lenses as well as coating requirements and volume pricing are available upon request.