PRECISION OPTICS Filters Prisms Lenses Meniscus Lenses Bi-convex Lenses Bi-concave Lenses Cylindrical Lenses Achromatic Lenses Plano-convex Lenses Plano-concave Lenses Elliptical Aspheric Lenses Paraboloid Aspheric Lenses Mirrors Windows Waveplates Laser Optics Beam-Splitters Custom-built Products Optical Parts Of Stock LASERS LASER ACCESSORY PARTS CRYSTALS NEGATIVE ACHROMATIC LENSES POSITIVE ACHROMATIC LENSES   Specification       Material: N-BK7 or Click this to Glass List Dimension Tolerance: +0 / -0.05mm Foci Tolerance: ±1% Center Thickness Tolerance: ±0.05mm Centration: 3arc minutes Surface Figure: λ/4@632.8nm Surface Quality: 40 / 20 Bevel: 0.25 × 45° Clear Aperture: >85% Coating: Specified by customer               PRODUCTS LIST Part No. F [ mm ] Dia [ mm ] R1 [ mm ] R2=R3 [ mm ] R4 [ mm ] Tc1 [ mm ] Tc2 [ mm ] fb [ mm ] SSL-RO-AN-001 -25 12.7 -15.60 13.09 44.16 3.00 2.67 -27.5 SSL-RO-AN-002 -40 12.7 -24.45 17.97 66.60 3.00 2.34 -42.5 SSL-RO-AN-003 -50 25.4 -31.19 24.89 85.31 3.00 4.22 -53.3 SSL-RO-AN-004 -55 38.1 -42.23 31.46 96.44 3.00 5.43 -62.3     Note:     1. More question and require please contact to our sales engineer:       2. Download this optical products catalogue please click:       3. Explain for optical specification please click:       4. Choosing and download optics glass data sheet by PDF file please click:       Our Promise:   • 24 Hours Reply Reply the Email within 24hours [ work day ]. • 48 Hours Reply Provide the Quoation list within 48hours [ work day ]. • No Mini Order No minimum quantity per order. • Fast Delivery Fast and Exact delivery time for products. • Best Quality Best quality depend on best quality material, high-tech and carefully test. • Safe Delivery Profession and multi-protection packing for safe delivery. • Safe Transaction 15Years working for develop laser products, never leave or stop.