Product Information OEM Products Optical Devices & Components High Precision Prism Test Plates Thin Film Coating Products Projection Lenses Aspherical Elements Plastic High-Precision Injection MoldedComponents Spherical Lens Elements Molding Die for High-Precision Engineering Plastic Injection CCTV Lenses SLR Lenses BRONICA Medium Format Cameras

English Top > Product Information > Optical Devices & Components Top > Spherical Lens Elements Well-founded with experienced engineers armed with advanced production equipment and measurement devices, Tamron produces a vast array of elements from diversified glass materials in different forms: plano-convex, bi-convex, convex meniscus, plano-concave, bi-concave, and concave meniscus. Diameters range from as small as 3.5mm up to as large as 200mm. Contour Convex Elements Plano-Convex, Bi-Convex, Meniscus Concave Elements Plano-Convex, Bi-Convex, Meni Dimensions External Diameter o3.5 - o200mm Curvature R1.5mm - ∞ Materials Optical glass, Silica glass, Si, Ge Accuracy   Common Grade High Grade Newton Rings 2 - 5 fringes 1 - 2 fringes Astigmatism 0.5 - 1 lines 0.2 - 0.4 lines Diameter Tolerance ± 0.02mm ± 0.005mm Angular Deviation to Axis < 1 min < 30sec. Thickness at Center ± 0.03 - ± 0.05mm ± 0.01mm Measurement Devices Interferometer, Spherometer, Test Plates, Surface Form Tallying Device