BRD Optical provides meniscus lens in both positive and negative focal lengths. These lenses are useful when used with another lenses to increase or decrease the focal length. This lens element configuration does not introduce any additional coma or spherical aberrations
BRD Optical provides meniscus lens in both positive and negative focal lengths. On the aspect of shape, it can be divided into convex and concave meniscus lens. On the aspect of the effect, it can be divided into diverging and converging meniscus lens.
| 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） | |
| Center Thickness | 2mm~20mm |
| Surface quality | 60/40， 40/20， 20/10 |
| Surface accuracy | λ/2~λ/10@632.8nm，532nm |
| Clear Aperture | >85% dig diameter |
| Centration | <3arc min~ 30arc sec |
| Coating | As per customer’s request |
| Material | Diameter (mm) | Convex Surface Radius (mm) | Concave Surface Radius (mm) | Center Thickness (mm) | Focal Length (mm) |
| H-K9L | 7 | 4.6 | -4.60 | 3 | 41.4 |
| H-LAF38 | 8 | 6.28 | -95.10 | 2.2 | 8.9 |
| H-ZBAF5 | 8 | 9.7 | -19.72 | 2.27 | 26 |
| H-ZF52A | 8 | 12.05 | -9.50 | 4.2 | 217 |
| ZnSe | 8.6 | 11.22 | -50.58 | 1.4 | 8.7 |
| H-ZF62 | 9 | 9.911 | -38.55 | 2.1 | 13.8 |
| H-ZF62 | 9 | 10.59 | -13.37 | 7.64 | 23.8 |
| H-K9L | 10 | 5.19 | -500.00 | 6.2 | 10.1 |
| JGS1 | 10.802 | 7.69 | -7.28 | 3 | 226.1 |
| H-K9L | 11 | 16.57 | -156.37 | 3 | 35.5 |
| H-LAF50A | 12 | 13.176 | -132.74 | 3.3 | 18.7 |
| H-ZK9 | 12 | 11.57 | -48.93 | 2.86 | 23.7 |
| H-ZBAF21 | 12 | 15.374 | -65.11 | 3 | 27 |
| H-ZK3 | 13 | 8.088 | -21.23 | 4 | 23.2 |
| S-LAM7 | 13 | 16.94393 | -170.00 | 2.5 | 24.9 |
| H-ZLAF75A | 14 | 13.804 | -51.24 | 2.4 | 20.1 |
| H-ZF7LA | 14 | 11.324 | -5.50 | 9.54 | 49.3 |
| H-K9L | 14 | 10.36 | -14.62 | 5 | 50.3 |
| H-ZLAF68 | 14 | 10.16 | -6.87 | 6.4 | 282.2 |
| H-ZF6 | 15 | 119 | -18.95 | 3.86 | 30.3 |
| H-LAF3B | 15 | 20.73 | -145.88 | 2.8 | 32.2 |
| H-K9L | 15 | 9.26 | -18.16 | 3.5 | 32.3 |
| H-ZLAF55A | 15 | 28.847 | -293.95 | 3 | 38.1 |
| H-ZK3 | 15.2 | 15.3 | -231.90 | 2.8 | 27.67 |
| LAF10 | 15.5 | 24.66 | -163.59 | 2.7 | 36.52 |
| H-LAF53 | 16 | 12.823 | -33.57 | 4.8 | 25.4 |
| H-ZLAF52 | 16 | 18.67 | -67.51 | 3 | 31.2 |
| H-ZK6 | 16 | 13.996 | -34.67 | 3.5 | 36.4 |
| H-LAK4 | 16 | 22.7 | -39.63 | 4 | 74.8 |
| H-ZLAF68 | 16 | 11.251 | -7.74 | 4.8 | 78.1 |
| ZK9 | 17 | 11.695 | -11.70 | 7 | 81.4 |
| H-ZF13 | 18 | 96.302 | -26.99 | 1.5 | 48.2 |
| H-K9L | 18 | 36.4 | -51.52 | 3.5 | 222.45 |
| H-LAF10L | 18.98 | 21.38 | -32.36 | 3.6 | 69.8 |
| H-ZK9A | 19 | 13.895 | -29.05 | 3.6 | 39.4 |
| ZK7 | 19.4 | 17.783 | -43.05 | 3 | 47.29 |
| H-LAF53 | 20 | 16.482 | -55.46 | 4 | 30.1 |
| H-ZK10 | 20 | 18.054 | -35.41 | 5 | 53.3 |
| H-ZLAF66 | 20 | 21.099 | -28.09 | 5 | 80.3 |
| H-ZK7 | 20 | 60.67 | -778.00 | 2.9 | 106.8 |
| H-BAK4 | 22 | 17.497 | -114.52 | 4.7 | 36.7 |
| H-LAK3 | 22 | 21.04 | -39.81 | 3.8 | 54.7 |
| H-ZBAF3 | 22 | 38.9 | -498.90 | 2.7 | 63.8 |
| H-K9L | 22 | 72.44 | -1130.00 | 5 | 149.5 |
| H-BAK4 | 22.5 | 24.619 | -1735.00 | 5 | 45 |
| H-ZF7LA | 22.6 | 22.44 | -28.91 | 9.88 | 74 |
| H-LAF53 | 23 | 16.788 | -36.22 | 5 | 38 |
| H-LAF53 | 23 | 16.788 | -36.22 | 5 | 38 |
| BAF5 | 23 | 32.8 | -219.10 | 3 | 62.3 |
| H-ZK1 | 23.4 | 46.48 | -176.06 | 4.56 | 109.6 |
| H-LAK59 | 23.48 | 102.33 | -194.98 | 2.5 | 308.2 |
| H-ZF7LA | 24 | 17.819 | -30.30 | 10 | 39.6 |
| H-K9L | 25 | 17.3 | -27.00 | 4.55 | 80.3 |
| H-K9L | 25.4 | 32.1 | -82.20 | 3.6 | 100 |
| JGS1 | 25.4 | 31 | -91.20 | 4 | 100 |
| H-K9L | 25.4 | 66.2 | -182.20 | 2.8 | 200 |
| JGS1 | 25.4 | 64.2 | -209.80 | 2.9 | 200 |
| H-K9L | 25.4 | 100.9 | -288.20 | 2.5 | 300 |
| ZK9 | 25.5 | 22.96 | -89.26 | 4.4 | 48.59 |
| N-SF6 | 26 | 32.15 | -176.40 | 4 | 43.2 |
| H-LAK3 | 26 | 26.79 | -127.94 | 4.2 | 44.4 |
| H-K9L | 26 | 23.93 | -331.70 | 6 | 49.58 |
| H-ZK11 | 27 | 23.07 | -77.04 | 4.8 | 49.8 |
| H-LAK1 | 27 | 26.24 | -74.99 | 4.1 | 59.8 |
| H-ZK10 | 27 | 38.688 | -1541.90 | 5 | 63.7 |
| H-ZK10 | 27 | 43.279 | -311.79 | 5 | 80 |
| H-ZK9 | 28 | 21.82 | -83.35 | 5.5 | 46.07 |
| H-ZBAF21 | 28 | 37.865 | -862.87 | 3.5 | 54.7 |
| H-LAF53 | 30 | 18.75 | -52.24 | 7.5 | 35.9 |
| H-K9L | 30 | 18.8 | -37.95 | 5.9 | 65.7 |
| ZK9 | 32 | 23.99 | -42.85 | 8 | 75.58 |
| H-BAK4 | 33 | 23.4 | -38.20 | 6.2 | 95.14 |
| H-K9L | 33 | 50.35 | -85.11 | 3.1 | 231.74 |
| H-ZF6 | 33.5 | 213.8 | -46.03 | 2.97 | 71.9 |
| H-ZK98 | 34 | 49 | -75.00 | 4.5 | 213.7 |
| H-ZBAF3 | 35 | 38.15 | -212.35 | 10 | 69.2 |
| H-K9L | 36 | 64.9 | -116.41 | 3.6 | 277.48 |
| H-ZBAF3 | 40 | 52.2 | -2148.00 | 12.1 | 81.3 |
| H-K9L | 40 | 45.71 | -62.37 | 3.5 | 309.27 |
| H-K9L | 41 | 78.52 | -622.30 | 4.1 | 173.57 |
| H-K9L | 41 | 65.77 | -111.94 | 3.7 | 300.61 |
| F2 | 42 | 28.5 | -71.30 | 8.8 | 71.8 |
| H-ZBAF20 | 42 | 32.137 | -59.02 | 14 | 82.8 |
| H-QK3L | 42 | 35.471 | -34.95 | 14.1 | 621 |
| H-ZF6 | 43.2 | 51.2 | -71.28 | 4 | 221.7 |
| H-QK3L | 44 | 37.026 | -239.30 | 8 | 88.7 |
| H-ZF6 | 45 | 48.91 | -87.90 | 5 | 136.7 |
| H-K9L | 48.5 | 72.44 | -150.31 | 4.5 | 265.57 |
| H-ZK11 | 49 | 32.81 | -104.23 | 11.4 | 70.6 |
| H-K9L | 50.5 | 81.75 | -145.88 | 4 | 352.64 |
| H-K9L | 58 | 107.15 | -477.00 | 7 | 265.1 |
| F4 | 59 | 1267.1 | -266.16 | 5 | 544 |
| H-K9L | 60 | 39.72 | -142.41 | 13.8 | 102 |
| H-K9L | 60.274 | 66.37 | -178.49 | 10.66 | 198 |
| H-K9L | 60.274 | 122.987 | -424.51 | 10.66 | 331 |
| H-ZF2 | 74 | 65.851 | -121.34 | 9 | 201 |
| H-ZBAF21 | 76 | 157.04 | -306.97 | 6 | 437 |
| H-K9L | 81 | 203.7 | -2773.00 | 9.96 | 424.84 |
| H-LAK7 | 104 | 181.59 | -320.37 | 12 | 567.4 |
| H-K9L | 106 | 110.1 | -257.80 | 11.3 | 362.4 |
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