双凹透镜与平凹透镜类似，焦距为负，平行入射的光线向外发散，双凹透镜的两个侧面曲率半径相等，一般用于扩束光线和投影等。
双凹透镜具有负焦距常用于成像或光束准直等应用，镀膜后的透镜也广泛应用于于可见光和近红外应用领域。
常规产品规格如下表，我们也可以为客户定做各种规格的双凹透镜。
常规产品规格
| 双凹透镜（尺寸及镀膜可按用户需求定制）单位mm | |||||
| 序号 | 品号 | 焦距 | 外径 | 中心厚度 | 材料 |
| 1 | DC-001 | -158.89 | 47.0 | 3.3(±0.05) | F4 |
| 2 | DC-002 | -142.01 | 45.0 | 4.3(±0.05) | H-ZF52 |
| 3 | DC-003 | -140.05 | 50.0 | 3.5(±0.1) | H-ZF4 |
| 4 | DC-004 | -138.96 | 50.0 | 3.5(±0.1) | H-ZF4 |
| 5 | DC-005 | -121.10 | 20.0 | 2.2(±0.05) | ZF1 |
| 6 | DC-006 | -117.10 | 48.0 | 5.0(±0.1) | ZF2 |
| 7 | DC-007 | -111.81 | 47.0 | 4.3(±0.05) | H-ZF6 |
| 8 | DC-008 | -109.77 | 24.0 | 2.0(±0.1) | K9 |
| 9 | DC-009 | -92.15 | 47.0 | 3.8(±0.05) | H-ZF2 |
| 10 | DC-010 | -89.75 | 45.0 | 4.0(±0.05) | ZF6 |
| 11 | DC-011 | -88.58 | 45.0 | 4.3(±0.05) | ZF2 |
| 12 | DC-012 | -65.72 | 11.0 | 1.0(±0.05) | H-QK3 |
| 13 | DC-013 | -60.30 | 24.0 | 1.5(±0.04) | H-ZF7LA |
| 14 | DC-014 | -59.80 | 6.0 | 1.2(±0.10) | K9 |
| 15 | DC-015 | -57.16 | 14.0 | 2.0(±0.1) | F2 |
| 16 | DC-016 | -56.18 | 14.5 | 2.0(±0.1) | H-K9L |
| 17 | DC-017 | -49.61 | 46.0 | 2.1(±0.03) | S-TIH11 |
| 18 | DC-018 | -48.41 | 45.6 | 2.0(±0.03) | S-TIH11 |
| 19 | DC-019 | -43.61 | 16.0 | 2.0(±0.1) | BaK2 |
| 20 | DC-020 | -43.37 | 16.0 | 2.0(±0.1) | BAK2 |
| 21 | DC-021 | -42.90 | 16.0 | 1.5(±0.05) | K9 |
| 22 | DC-022 | -39.19 | 18.0 | 2.0(±0.05) | BaK7 |
| 23 | DC-023 | -36.77 | 12.0 | 1.5(±0.1) | F3 |
| 24 | DC-024 | -36.25 | 13.0 | 1.0(±0.04) | ZF1 |
| 25 | DC-025 | -34.28 | 12.0 | 1.5(±0.1) | K9 |
| 26 | DC-026 | -33.71 | 18.0 | 1.0(±0.05) | K9 |
| 27 | DC-027 | -32.35 | 25.0 | 2.0(±0.05) | S-TIH10 |
| 28 | DC-028 | -31.40 | 26.0 | 2.8(±0.1) | F2 |
| 29 | DC-029 | -30.43 | 18.0 | 1.4(±0.05) | ZK7 |
| 30 | DC-030 | -29.20 | 13.0 | 2.2(±0.1) | ZK11 |
| 31 | DC-031 | -28.24 | 18.0 | 1.2±0.03 | BAK8 |
| 32 | DC-032 | -28.13 | 30.0 | 2.0(±0.1) | ZF13 |
| 33 | DC-033 | -27.00 | 47.6 | 2.0(±0.03) | S-TIH53 |
| 34 | DC-034 | -24.30 | 9.0 | 1.2(±0.05) | K9 |
| 35 | DC-035 | -24.19 | 9.0 | 2.3(±0.1) | BaF4 |
| 36 | DC-036 | -24.12 | 15.0 | 1.5(±0.04) | H-K9L |
| 37 | DC-037 | -23.60 | 11.0 | 1.0(±0.05) | K10 |
| 38 | DC-038 | -23.10 | 25.0 | 2.0(±0.04) | ZF7 |
| 39 | DC-039 | -22.77 | 15.0 | 1.5(±0.04) | H-K9L |
| 40 | DC-040 | -22.39 | 15.0 | 1.5(±0.04) | H-K9L |
| 41 | DC-041 | -22.13 | 15.0 | 1.5(±0.04) | H-K9L |
| 42 | DC-042 | -21.41 | 12.0 | 1.2(±0.05) | ZK4 |
| 43 | DC-043 | -21.12 | 18.0 | 2.0(±0.05) | H-K9L |
| 44 | DC-044 | -21.00 | 13.0 | 1.0(±0.05) | ZK3 |
| 45 | DC-045 | -20.86 | 22.0 | 1.5(±0.05) | ZF7 |
| 46 | DC-046 | -19.85 | 14.0 | 1.5(±0.05) | BaK2 |
| 47 | DC-047 | -19.72 | 14.0 | 1.2(±0.1) | BaF2 |
| 48 | DC-048 | -18.86 | 10.0 | 1.3(±0.02) | ZF6 |
| 49 | DC-049 | -18.40 | 23.2 | 2.0(±0.03) | S-BSM81 |
| 50 | DC-050 | -17.80 | 11.5 | 1.3(±0.02) | ZF6 |
| 51 | DC-051 | -17.19 | 12.0 | 1.0(±0.03) | H-LAF50 |
| 52 | DC-052 | -17.16 | 17.4 | 2.0(±0.03) | S-BSM25 |
| 53 | DC-053 | -16.80 | 8.0 | 0.9(±0.03) | K9 |
| 54 | DC-054 | -14.80 | 12.0 | 1.5(±0.05) | H-LaK54 |
| 55 | DC-055 | -14.50 | 9.0 | 0.95(±0.03) | K9 |
| 56 | DC-056 | -14.34 | 17.6 | 1.8(±0.1) | LaK10 |
| 57 | DC-057 | -13.98 | 15.0 | 1.2(±0.04) | H-K9L |
| 58 | DC-058 | -13.21 | 9.0 | 2.0(±0.05) | H-QK3L |
| 59 | DC-059 | -13.11 | 14.0 | 2.23(±0.03) | N-BAF4 |
| 60 | DC-060 | -13.00 | 13.0 | 1.5(±0.1) | ZBaF1 |
| 61 | DC-061 | -12.86 | 14.0 | 1.7(±0.03) | S-LAL7 |
| 62 | DC-062 | -12.40 | 14.0 | 1.5(±0.03) | N-BAF4 |
| 63 | DC-063 | -12.16 | 8.0 | 1.0(±0.04) | ZK9 |
| 64 | DC-064 | -11.92 | 9.0 | 1(±0.05) | ZF13 |
| 65 | DC-065 | -11.66 | 9.0 | 1.0(±0.05) | ZK9 |
| 66 | DC-066 | -11.19 | 11.5 | 1.1(±0.05) | H-ZBAF5 |
| 67 | DC-067 | -10.29 | 15.0 | 1.5(±0.05) | H-LAF4 |
| 68 | DC-068 | -10.02 | 8.0 | 0.8(+0.05/-0.15) | ZF2 |
| 69 | DC-069 | -9.96 | 11.0 | 0.8(±0.1) | ZF3 |
| 70 | DC-070 | -9.55 | 10.0 | 1.2(±0.05) | ZF7 |
| 71 | DC-071 | -8.69 | 10.0 | 1.7(±0.03) | S-LAL54 |
| 72 | DC-072 | -8.65 | 5.0 | 2.4(±0.05) | ZF2 |
| 73 | DC-073 | -8.50 | 10.0 | 1.0(±0.05) | ZF7L |
| 74 | DC-074 | -8.46 | 8.0 | 1.0(±0.02) | F2 |
| 75 | DC-075 | -6.98 | 9.0 | 1.0(±0.1) | ZF7 |
| 76 | DC-076 | -6.53 | 9.5 | 0.8(±0.1) | ZF4 |
| 77 | DC-077 | -6.53 | 8.0 | 0.8(±0.1) | ZF4 |
| 78 | DC-078 | -6.44 | 8.5 | 0.8(±0.05) | ZF4 |
| 79 | DC-079 | -6.01 | 8.0 | 0.6(±0.02) | BAF4 |
| 80 | DC-080 | -5.80 | 5.8 | 0.8(±0.05) | H-ZF4 |
| 81 | DC-081 | -5.48 | 5.0 | 2.0(±0.1) | ZF6 |
| 82 | DC-082 | -4.75 | 7.2 | 1.7(±0.1) | LaK10 |
| 83 | DC-083 | 11.50 | 9.0 | 1.0(±0.05) | ZF13 |
| 84 | DC-084 | 23.52 | 15.0 | 1.5(±0.04) | H-K9L |
| 85 | DC-085 | 68.34 | 14.0 | 2.0(±0.1) | F2 |
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