Plano concave lenses are mainly used for infinite conjugate applications, laser applications, image systems. with the negative focal length, plano concave lenses have a flat face and an concave face.
Sunday is manufacturing plano concave lenses with glass, fused silica, infrared crystal, sapphire materials. with the advance testing machines Sunday can make high precision lenses for customers.
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Parameter
| Structure | Plano concave lens |
| Material | Optical glass, UVFS, Germanium, Silicon, CaF2, MgF2, ZnSe ZnS, Sapphire |
| Diameters Available | 0.5mm to 600mm |
| Diameter Tolerance | +0.00/-0.01mm or customer design |
| Surface Quality | 10 |
| Surface Irregularity | λ/10 PV @632.8nm or customer design |
| Thickness tolerance | +0/-0.01mm |
| Clear Aperture | >90% of Diameter |
| Chamfer | 0.05-0.5mmx45degree, according to customer's needs. |
| Centeration | <10 arcsec |
| Coating | Single Mag2, Multiple Layers AR Coating A:350-650nm B:650-1050nm C:1050-1585nm D: Customer Design |
BK7 Standard Plano Concave Lens
| No. | EFL(mm) | Dia.(mm) | Radius(mm) | Material | Tc(mm) | Te(mm) |
| SD3A61 | -10 | 6.00 | -5.18 | BK7 | 2.00 | 2.95 |
| SD3A62 | -20 | 6.00 | -10.37 | Bk7 | 2.00 | 2.44 |
| SD3A63 | -30 | 6.00 | -15.56 | BK7 | 2.00 | 2.29 |
| SD3A22 | -20 | 12.70 | -10.37 | BK7 | 2.00 | 4.17 |
| SD3A23 | -30 | 12.70 | -15.56 | BK7 | 2.00 | 3.40 |
| SD3A24 | -40 | 12.70 | -20.75 | BK7 | 2.00 | 3.00 |
| SD3A25 | -50 | 12.70 | -25.94 | BK7 | 2.00 | 2.79 |
| SD3A27 | -75 | 12.70 | -38.90 | BK7 | 2.00 | 2.52 |
| SD3A20 | -100 | 12.70 | -51.88 | BK7 | 2.00 | 2.39 |
| SD3A45 | -50 | 25.40 | -25.94 | Bk7 | 2.00 | 5.32 |
| SD3A47 | -75 | 25.40 | -38.90 | Bk7 | 2.00 | 4.13 |
| SD3A41 | -100 | 25.40 | -51.88 | BK7 | 2.00 | 3.58 |
| SD3A415 | -150 | 25.40 | -77.80 | BK7 | 2.00 | 3.04 |
| SD3A420 | -200 | 25.40 | -103.75 | BK7 | 2.00 | 2.78 |
| SD3A425 | -250 | 25.40 | -129.72 | BK7 | 2.00 | 2.62 |
| SD3A510 | -100 | 50.80 | -51.88 | BK7 | 2.00 | 8.64 |
| SD3A520 | -200 | 50.80 | -103.75 | BK7 | 2.00 | 5.16 |
| SD3A530 | -300 | 50.80 | -155.60 | BK7 | 2.00 | 4.00 |
| SD3A550 | -500 | 50.80 | -259.40 | BK7 | 2.00 | 3.25 |
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