Double-convex Lenses are manufactured with an identical convex surface on both sides of the lens. This kind of lenses has positive focal length and form both real and vitrual images.
| Material: | BK7, Fused Silica, SF10, CaF2, Sapphire .etc. |
| Paraxial Focal Length Tolerance: | ±2% |
| Dimension Tolerance: | ±0.2(General). ±0.05(High Precision) |
| Centration: | <3 arc min |
| IRR: | λ/4@633nm（General),λ/10@633nm(High Precision) |
| Clear Aperture: | >80%(Small Size), >95%(Laege Size) |
| Surface Figure | <1.5λ@633nm（General),<λ/4@633nm(High Precision) |
| Surface Quality: | 60/40（General),10/5(High Precision) |
| Bevel: | <0.25mm |
| Coating: | Uncaoted, AR,PR, HR, etc. |
| Item# | F(mm) | f(mm) | R2=R2(mm) | Tc | Te | Fb |
| Material | N-BK7 | |||||
| LDC-001 | 6 | 15 | 15.2 | 2.1 | 1.5 | 14.3 |
| LDC-002 | 6 | 30 | 30.83 | 1.79 | 1.5 | 29.42 |
| LDC-101 | 12.7 | 15 | 14.65 | 4.89 | 2 | 13.27 |
| LDC-102 | 12.7 | 20 | 20.04 | 4.07 | 2 | 18.62 |
| LDC-103 | 12.7 | 25 | 25.35 | 3.62 | 2 | 23.82 |
| LDC-104 | 12.7 | 30 | 30.55 | 3.33 | 2 | 28.89 |
| LDC-105 | 12.7 | 40 | 41.02 | 2.99 | 2 | 39.04 |
| LDC-106 | 12.7 | 50 | 51.4 | 2.79 | 2 | 49.08 |
| LDC-107 | 12.7 | 75 | 77.45 | 2.52 | 2 | 74.24 |
| LDC-108 | 12.7 | 100 | 103.28 | 2.39 | 2 | 99.16 |
| LDC-201 | 25.4 | 25 | 24.72 | 9.02 | 2 | 22.24 |
| LDC-202 | 25.4 | 31.7 | 31.55 | 7.34 | 2 | 29.15 |
| LDC-203 | 25.4 | 35 | 35.08 | 6.76 | 2 | 32.66 |
| LDC-204 | 25.4 | 50 | 50.93 | 5.22 | 2 | 48.22 |
| LDC-205 | 25.4 | 75 | 77.09 | 4.11 | 2 | 73.63 |
| LDC-206 | 25.4 | 100 | 103.04 | 3.57 | 2 | 98.73 |
| LDC-207 | 25.4 | 125 | 129.12 | 3.25 | 2 | 123.92 |
| LDC-208 | 25.4 | 150 | 155.1 | 3.04 | 2 | 149 |
| LDC-209 | 25.4 | 175 | 181.13 | 2.89 | 2 | 174.12 |
| LDC-210 | 25.4 | 200 | 207 | 2.78 | 2 | 199.07 |
| LDC-211 | 25.4 | 250 | 258.9 | 2.62 | 2 | 249.12 |
| LDC-212 | 25.4 | 300 | 310.8 | 2.52 | 2 | 299.17 |
| LDC-213 | 25.4 | 500 | 518.3 | 2.31 | 2 | 499.21 |
| LDC-214 | 25.4 | 1000 | 1037.1 | 2.16 | 2 | 999.32 |
| LDC-301 | 30 | 50 | 50.7 | 6.54 | 2 | 47.77 |
| LDC-302 | 30 | 500 | 518.3 | 2.43 | 2 | 499.19 |
| LDC-401 | 38 | 45 | 44.87 | 10.44 | 2 | 41.46 |
| LDC-402 | 38 | 50 | 49.97 | 10.5 | 3 | 46.4 |
| LDC-403 | 38 | 100 | 102.57 | 6.55 | 3 | 97.78 |
| LDC-404 | 38 | 150 | 154.7 | 5.34 | 3 | 148.23 |
| LDC-405 | 38 | 200 | 206.7 | 4.75 | 3 | 198.46 |
| LDC-406 | 38 | 350 | 362.4 | 4 | 3 | 348.66 |
| LDC-407 | 38 | 500 | 518.1 | 3.7 | 3 | 498.79 |
| LDC-408 | 38 | 700 | 725.6 | 3.5 | 3 | 698.84 |
| LDC-409 | 40 | 63.5 | 64.42 | 8.27 | 1.9 | 60.7 |
| LDC-501 | 50 | 100 | 102.06 | 9.2 | 3 | 96.9 |
| LDC-502 | 50 | 150 | 154.27 | 7.1 | 3 | 147.6 |
| LDC-503 | 50 | 200 | 206.28 | 6 | 3 | 198 |
| LDC-504 | 50 | 250 | 258.22 | 5.4 | 3 | 248.2 |
| LDC-505 | 50 | 400 | 413.87 | 4.5 | 3 | 398.5 |
| LDC-506 | 50 | 450 | 465.73 | 4.3 | 3 | 448.6 |
| LDC-507 | 50 | 500 | 517.58 | 4.2 | 3 | 448.6 |
| LDC-508 | 50 | 600 | 621.28 | 4 | 3 | 598.7 |
| LDC-509 | 50 | 800 | 828.64 | 3.8 | 3 | 798.7 |