Sell Bi-Convex Lenses

These lenses have a large range of lengths and are the optimum shape for producing real images at 1:1 magnification. In a single lens application you should consider using them in preference to a single plano-convex lens if the magnification lies in the region of -5 We specialize in the production of medium to large-size custom mirrors with exacting tolerances, high grade surface finishes and difficult coatings. Please send us your specification or drawing and we will be happy to return a quotation ASAP. Our average response time is within 24 hours. Our optical designers are always available to assist with your special needs and our factory in China is ready to meet your quantity requirements. Specifications: 1) Diameter: Φ4 - 1000mm 2) Material: BK7 (K9), or as requested 3) Surface quality: up to 60-40 S&D, or as requested 4) Surface accuracy: up to λ/4, or as requested 5) Clear aperture: >90% 6) Diameter tolerance: +0.0/-(0.1-0.2)mm (depends on the dimension) 7) Focal length tolerance: ±2% 8) EFL: as requested 9) Surface figure: λ/4, or as requested 10) Centering tolerance: 3\'\', or as requested 11) CT tolerance: ±0.15mm, or as requested 12) ET tolerance: as requested 13) Bevel: (0.25 - 1.0mm) x 45° (depends on the diameter) 14) Coating: as requested