Home / Custom / Optical Components / Optical Spherical Lens / Plano Concave Lens 
Plano concave lens bend parallel input rays so they diverge from one another on the output side of the lens and hence have a negative focal length. The spherical aberration of the plano concave lenses is negative and can be used to balance aberrations created by other lenses. Similar to the plano concave lens, the curvature surface usually faces the largest object distance or the infinite conjugate to minimize spherical aberration.
Optical glass such as K9, fused silica, sapphire, MgF2, silicon (Si), ZnSe, ZnS, etc. These materials possess high transmittance, low absorption, low scattering, uniform refractive index, and specific dispersion characteristics.
Precisely hemispherical. The machining precision of the center and radius of curvature of the sphere is extremely high.
The surface is precision polished to an optical grade of 10-5 to ensure image quality and reduce scattering and aberrations.
An AR coating is typically applied to the concave surface to maximize the transmittance of specific wavelengths of light (e.g. visible light) and reduce reflection loss.
| Material | Optical glass/ Fused silica/ sapphire etc. |
|---|---|
| Diameter | 2mm~300mm |
| Diameter tolerance | ±0.05mm(≤50mm) |
| ±0.1mm(＞50mm) | |
| Focal length | -50mm~-2000mm |
| Focal length tolerance | ±0.2%（＜10mm） |
| ±0.5%（＜10mm-1000mm） | |
| ±1%（＜＞1000mm） | |
| Edge Thickness | 2mm~20mm |
| Surface quality | 60/40， 40/20， 20/10 |
| Surface accuracy | λ/2~λ/10@632.8nm，532nm, etc. |
| Clear Aperture | >85% dig diameter |
| Centration | <3arc min~ 30arc sec |
| Chamfer | <0.2mm×45° |
| Coating | As per customer’s request |
| Type No. | Diameter (mm) | Center Thickness (mm) | Edge Thickness (mm) | Effective Focal Length (mm) |
|---|---|---|---|---|
| PCA-6 | 6 | 2 | 2.9 | -10 |
| PCA-7.8 | 7.8 | 5.3 | 16.3 | -12.7 |
| PCA-8 | 8 | 2 | 3 | -15 |
| PCA-10 | 10 | 2 | 3.2 | -20 |
| PCA-12.7-A | 12.7 | 2 | 4.1 | -20 |
| PCA-12.7-B | 12.7 | 2 | 3.4 | -30 |
| PCA-12.7-C | 12.7 | 2 | 2.8 | -50 |
| PCA-12.7-D | 12.7 | 2 | 2.3 | -100 |
| PCA-15 | 15 | 2 | 2.7 | -75 |
| PCA-21 | 21 | 2 | 4.7 | -40- |
| PCA-22.4 | 22.4 | 2 | 3.2 | -100 |
| PCA-25.4-B | 25.4 | 2 | 7.2 | -35 |
| PCA-25.4-C | 25.4 | 2 | 4.3 | -70 |
| PCA-25.4-D | 25.4 | 2 | 4.1 | -75 |
| PCA-25.4-E | 25.4 | 2 | 3.6 | -100 |
| PCA-25.4-F | 25.4 | 2 | 3 | -150 |
| PCA-25.4-G | 25.4 | 2 | 2.7 | -200 |
| PCA-25.4-H | 25.4 | 2 | 2.5 | -300 |
| PCA-25.4-I | 25.4 | 2 | 2.3 | -500 |
| PCA-25.4-J | 25.4 | 2 | 2.2 | -1000 |
| PCA-30 | 30 | 2 | 4.8 | -80 |
| PCA-38-A | 38 | 3 | 11.3 | -50 |
| PCA-38-B | 38 | 3 | 6.6 | -100 |
| PCA-38-C | 38 | 3 | 4.8 | -200 |
| PCA-38-D | 38 | 3 | 4 | -350 |
| PCA-38-E | 38 | 3 | 3.7 | -500 |
| PCA-38-F | 38 | 3 | 3.5 | -700 |
| PCA-50-A | 50 | 5 | 11 | -100 |
| PCA-50-B | 50 | 5 | 9.7 | -125 |
| PCA-50-C | 50 | 3 | 4.2 | -500 |
| PCA-50-D | 50 | 3 | 3.8 | -800 |
| PCA-50.8-A | 50.8 | 3.5 | 13 | -75 |
| PCA-50.8-B | 50.8 | 4 | 10.7 | -100 |
| PCA-50.8-C | 50.8 | 4 | 8.3 | -150 |
| PCA-75-A | 75 | 5 | 14.6 | -150 |
| PCA-75-B | 75 | 5 | 12 | -200 |
| PCA-100-A | 100 | 6 | 18.85 | -200 |
| PCA-100-B | 100 | 6 | 16 | -250 |
| PCA-100-C | 100 | 6.2 | 14.45 | -300 |
| PCA-100-D | 100 | 8.2 | 14.32 | -400 |
| PCA-100-E | 100 | 8 | 12.87 | -500 |
| PCA-100-F | 100 | 9.6 | 13.64 | -600 |
| PCA-125-A | 125 | 4.2 | 17.3 | -300 |
| PCA-125-B | 125 | 5.6 | 15.24 | -400 |
| PCA-125-C | 125 | 6 | 13.64 | -500 |
| PCA-125-D | 125 | 9 | 15.34 | -600 |
| PCA-125-E | 125 | 8.4 | 13.82 | -700 |
| PCA-125-F | 125 | 9.6 | 14.34 | -800 |
| PCA-150-A | 150 | 5 | 19.03 | -400 |
| PCA-150-B | 150 | 6.2 | 17.29 | -500 |
| PCA-150-C | 150 | 7.5 | 16.68 | -600 |
| PCA-150-D | 150 | 9 | 16.83 | -700 |
| PCA-150-E | 150 | 8 | 14.84 | -800 |
| PCA-200-A | 200 | 6.57 | 26.63 | -500 |
| PCA-200-B | 200 | 7.8 | 24.31 | -600 |
| PCA-200-C | 200 | 9.2 | 23.25 | -700 |
| PCA-200-D | 200 | 10.5 | 22.73 | -800 |
| PCA-200-E | 200 | 11.8 | 22.64 | -900 |
| PCA-200-F | 200 | 13.1 | 22.83 | -1000 |
| PCA-250-A | 250 | 6 | 28.2 | -700 |
| PCA-250-B | 250 | 6.9 | 26.18 | -800 |
| PCA-250-C | 250 | 8 | 25.05 | -900 |
| PCA-250-D | 250 | 9.5 | 28.45 | -1000 |
| PCA-250-E | 250 | 12 | 25.87 | -1100 |
| PCA-250-F | 250 | 15 | 27.69 | -1200 |
| PCA-300-A | 300 | 10 | 32.17 | -1000 |
| PCA-300-B | 300 | 12 | 30.35 | -1200 |
| PCA-300-C | 300 | 14 | 29.67 | -1400 |
| PCA-300-D | 300 | 16 | 29.67 | -1600 |
| Material | Diameter (mm) | Concave Surface Radius (mm) | Center Thickness (mm) | Focal Length (mm) |
|---|---|---|---|---|
| H-K9L | 3 | -3.05 | 3 | -5.9 |
| H-K9L | 5 | -51.68 | 5 | -100 |
| H-K9L | 9 | -10.8 | 1.4 | -20.9 |
| JGS1 | 10 | -13.81 | 2 | -30.1 |
| Corning 7978 | 10 | -6.111 | 2 | -13.3 |
| H-K9L | 11 | -11.695 | 1 | -22.65 |
| H-K9L | 12 | -42.63 | 1.5 | -82.5 |
| Coring7978 | 12 | -27 | 2 | -58.9 |
| Corning 7978 | 12 | -18.155 | 2 | -39.6 |
| H-K9L | 12 | -13.4 | 1.4 | -26 |
| HWB850 | 12 | -8.3 | 3 | -16 |
| H-ZF7LA | 12 | -9 | 2 | -11.2 |
| JGS1 | 12.7 | -600 | 3 | -300 |
| JGS1 | 12.7 | -500 | 3 | -250 |
| JGS1 | 12.7 | -33.624 | 3.4 | -16.8 |
| H-ZK6 | 13 | -7.238 | 3 | -12.4 |
| H-LAF3 | 14 | -8.6 | 2 | -11.6 |
| H-K9L | 15 | -36.07 | 4.2 | -69.8 |
| HWB850 | 17 | -18.42 | 1.5 | -34.4 |
| H-K9L | 19 | -8.5 | 2 | -16.5 |
| ZF6 | 19 | -9.615 | 2 | -12.7 |
| H-K9L | 20 | -1500 | 3 | -2902 |
| H-K9L | 20 | -1000 | 3 | -1935 |
| H-K9L | 20 | -800 | 3 | -1548 |
| H-K9L | 20 | -500 | 3 | -967 |
| JGS1 | 20 | -33.332 | 4 | -72.7 |
| JGS1 | 20 | -31.688 | 3 | -69.1 |
| H-ZF7LA | 20 | -23.55 | 1.4 | -28.9 |
| B270 | 21.9 | -14.12 | 4.1 | -27 |
| H-K9L | 22 | -27 | 2 | -52.2 |
| Silica | 22.5 | -90 | 4.3 | -45 |
| ZF2 | 24 | -19.8 | 4.1 | -29.43 |
| H-K9L | 25 | -51.68 | 3.5 | -100 |
| JGS1 | 25 | -45.84 | 2.5 | -100 |
| JGS1 | 25 | -22.92 | 2 | -50 |
| JGS1 | 25 | -22.89 | 3 | -50 |
| JGS1 | 25.4 | -150 | 3 | -75 |
| JGS1 | 25.4 | -23 | 2 | -50 |
| Silica | 25.4 | -38.1 | 3.18 | -19 |
| H-ZF3 | 28 | -13.964 | 14 | -19.5 |
| H-ZF7LA | 30 | -12.706 | 1.2 | -15.6 |
| ZK2 | 30.3 | -82.6 | 2 | -141.56 |
| H-ZF7LA | 32 | -18.7 | 8.05 | -23.2 |
| H-K9L | 33 | -155 | 2.5 | -299.92 |
| H-K9L | 42 | -51.87 | 2 | -100 |
| JGS1 | 42 | -34.78 | 3 | -75.9 |
| H-ZF7LA | 44.98 | -35.149 | 2.5 | -43.7 |
| JGS1 | 46 | -70.96 | 3 | -155 |
| H-ZF7LA | 51.98 | -35.149 | 2 | -43.7 |
| H-ZF7LA | 52 | -44.3 | 3.485 | -55 |
| H-K9L | 58 | -600 | 10 | -1161 |
| ZBaF5 | 58 | -39.17 | 2 | -58.37 |
| H-ZF11 | 99 | -116.83 | 3.5 | -167 |
| H-K9L | 100 | -2000 | 12 | -1000 |
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