Product Name: Optical Glass Plano Concave Spherical Lens Model NO.: SC-157 Coating: Mirror and Ar Coating Customized: Customized Certification: RoHS, ISO9001, CE Lenses Color: Clear Material: Optical Glass Shape: Single-lens Transmittance: >95% Type: Concave Lens Usage: Lighting, Medical, Optical, Photography, Beam Expanding Surface Quality: 20-10 Flatness: Lambda/4 Chamfer: Protective Chamfer or as Per Requested Focal Tolerance: 1% Dimension Tolerance: +/-0.02mm Trademark: Shuncheng Transport Package: Carton Case Specification: diameter 1.5mm to 700mm Origin: Nanjing China HS Code: 9001909001 Product Description Plano concave lenses are flat on one side and have concave surface for another side. The lenses are designed for parallel light to be incident to the concave surface. So the plano concave lenses are used for applications including expanding beam, moderating quality image and also used for optical instruments. Because of diverging cone and virtual image, the typical use for plaon concave lens is beam expander. We produce plano concave lenses with different optical glassed such as, UV fused silica glass, N-BK7, N-BAK4, N-LAK22, Corning 7980, silicon, sapphire, etc. Anti-reflective coating and high reflectioncoating are availablefor the plano concave lenses. Custom Made capabilities:MaterialN-BK7, UV fused silica, JGS1,N-SF11, Silicon, Germanium, etc.Diameter available1.5mm to 700mmTolerance+/-0.03mmThickness tolerance+/-0.03mmSurface quality20/10 or betterSurface accuracyLambda/4 or betterCentering1 arc minChamferprotective Coatinganti reflective coating for visible, UV, infrared wavelengthsand reflective coating for the concave surface, mirror coatingOur factory introduction:Nanjing Shuncheng Optical Components Co.,Ltd. is a professional manufacturer of precision optical spherical lenses, cylindrical lenses, optical plates/windowsand optical filters for power laser applications, opto-mechanics, electro-optical and optical instruments. Our factory was founded in the year 1998, with 65 workers.. We are located in Nanjing city, about 200km from Shanghai. Most of our workers are rich-experienced workers, and they have skilled technology in production, research and inspection. We have polishing machines, grinding machines, centering machines, coating machines and cutting machines, as well as advanced testing machines. Our Products Range:Spherical lens, including plano convex lens, plano concave lens, biconvex lens, biconcave lens,achromatic lens, ball lens, drum lens, etc.Cylindrical lens,including plano convex cylindrical lens, plano concave cylindrical lens, biconvex cylindrical lens, biconcave cylindrical lens, cemented cylindrical lens, cylinder lens, cylinder rod lens.Optical window and plate. Round window, square window, rectangular window, wedge window, optical filter window, window with hole.Thin film: AR coating, reflective coating for mirror, band pass filter, beam splitter and density filter. Our Excellent Products:Our workshop for production and inspection:Our testing and inspection:FQAQ1: What machines and equipment are used for testing and inspection ?We have interferometer, focal length test machine, calipers, centering test machines, magnifier for check surface quality. Q2: Do you test the optics before delivery ?Yes, we test the lenses and windows before coating. After coating, our QA ladies will test the surface quality and dimension tolerance before packing. All the lenses and plates will be tested and inspected before delivery. Q3: How will you send the goods ?We send the goods by DHL or UPS. We have been working with DHL for more than 10 years, it's safe and fast for transit goods for DHL.