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    4. 福州高特光电科技有限公司

      The Negative Meniscus Lenses are a convex-concave lens, but is thinner at the center than at the edges. Otherwise description is similar to Plano Concave lenses. 

       

       

      Specifications:

      Material: BK7
      Design Wavelength: 546.1nm, n=1.518721
      Diameter Tolerance: +0.0/-0.1mm
      Paraxial Focal Length: ±2%
      Centration: 3 arc minutes
      Surface Figure : l/4 @ 633 nm
      Surface Quality: 60/40
      Clear Aperture: >80%
      Bevel: <0.25mm X 45°
      Coating: Uncoated

      Item# F(mm) f(mm) R1 R2 Tc Te Fb
      MNN1-201 25.4 -100.0 89.95 32.51 3.0 4.68 -98.79
      MNN1-202 25.4 -150.0 89.95 41.21 3.0 4.11 -148.06
      MNN1-203 25.4 -200.0 89.95 47.64 3.0 3.82 -197.82
      MNN1-204 25.4 -250.0 235.5 83.18 3.5 4.13 -248.62
      MNN1-205 25.4 -300.0 235.5 93.33 3.5 4.03 -299.04
      MNN1-206 25.4 -400.0 235.5 109.65 3.5 3.90 -397.33
      MNN1-207 25.4 -500.0 235.5 122.74 3.5 3.82 -496.94
      MNN1-208 25.4 -1000.0 600.00 277.16 3.0 3.1 -995.30

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