Unmounted N-BK7 Symmetric-Concave L enses, ARB2-VIS
Excelitas offers a selection of unmounted LINOS® symmetric-concave lenses made from N-BK7 glass in various focal lengths and diameters to suit diverse application requirements. These standard lenses feature double-sided anti-reflection coatings optimized for the visible (VIS) wavelength range to enhance transmittance. Production uses high-quality materials from trusted suppliers and maintains stringent tolerances to ensure exceptional quality. Each lens type is also available mounted in a black-anodized, engraved aluminum housing.
Our symmetric-concave lenses made of high-quality N-BK7 glass offer maximum flexibilty for custom integration into your optical systems. Tight focal-length tolerances ensure reliable and consistent optical performance.
These lenses feature two equal radii of curvature, ensuring precise optical performance in applications that require controlled beam divergence. The ARB2 VIS broadband anti-reflection coating offers high transmission from 450 to 700 nm and excellent resistance to laser damage.
ZEMAX files are offered to facilitate efficient optical design and simulation. Should you require custom specifications or higher-volume production, contact us for a tailored quote to meet your requirements.
Note: f = focal length (object side), f' = focal length (image side) , s = object distance, s' = back focal length, Ø = lens diameter, dm = center thickness, dr = edge thickness, h = primary vertex, h' = sagittal height secondary vertex, F, F' = focal points, H, H' = principal points; Tolerances: focal length f: ±2% image distance s': ±2%
Specifications broadband anti-reflective coating ARB2 VIS:
- Guaranteed residual reflection < 0.5 % for angles of incidence 0° ≤ AOI ≤ 15° in the AR range
- Typical average residual reflection < 0.3 % for angles of incidence 0° ≤ AOI ≤ 15° in the AR range
- Damage threshold H∞ > 30 J / cm² for 11 ns laser pulses (s‑on‑1) at 1064 nm and 10 Hz
- AR range typical: 450–700 nm
- Design adaptable to the spectral range of 350 nm ≤ λ ≤ 950 nm and to higher angles of incidence
| Product | Biconcave lens; N-BK 7; D=22.4; F=-20 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-100 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-50 [ARB2-VIS] | Biconcave lens; N-BK 7; D=12.7; F=-20 [ARB2-VIS] | Biconcave lens; N-BK 7; D=10; F=-10 [ARB2-VIS] | Biconcave lens; N-BK 7; D=12.7; F=-100 [ARB2-VIS] | Biconcave lens; N-BK 7; D=12.7; F=-50 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-40 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-30 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-150 [ARB2-VIS] | Biconcave lens; N-BK 7; D=40; F=-500 [ARB2-VIS] | Biconcave lens; N-BK 7; D=25.4; F=-200 [ARB2-VIS] | Biconcave lens; N-BK 7; D=12.7; F=-200 [ARB2-VIS] | Biconcave lens; N-BK 7; D=25.4; F=-50 [ARB2-VIS] |
| Optic Size | Ø 22.4 mm | Ø 22.4 mm | Ø 22.4 mm | Ø 12.7 mm | Ø 10.0 mm | Ø 12.7 mm | Ø 12.7 mm | Ø 22.4 mm | Ø 22.4 mm | Ø 22.4 mm | Ø 40.0 mm | Ø 25.4 mm | Ø 12.7 mm | Ø 25.4 mm |
| Focal Length (+/-) | -20.0 mm | -100.0 mm | -50.0 mm | -20.0 mm | -10.0 mm | -100.0 mm | -50.0 mm | -40.0 mm | -30.0 mm | -150.0 mm | -500.0 mm | -200.0 mm | -200.0 mm | -50.0 mm |
| Optic Substrate | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 |
| Coating | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS |
| Optic Center Thickness | 1.5 mm | 1.5 mm | 1.5 mm | 1.5 mm | 1.0 mm | 1.5 mm | 1.5 mm | 1.5 mm | 1.5 mm | 1.5 mm | 2.0 mm | 1.5 mm | 1.5 mm | 1.5 mm |
| Radius of Curvature 1 | -20.833 mm | -104.41 mm | -52.33 mm | -20.983 mm | -10.669 mm | -104.41 mm | -52.33 mm | -41.867 mm | -31.396 mm | -156.22 mm | -523.3 mm | -209.83 mm | -209.83 mm | -52.33 mm |
| Radius of Curvature 2 | 20.833 mm | 104.41 mm | 52.33 mm | 20.983 mm | 10.669 mm | 104.41 mm | 52.33 mm | 41.867 mm | 31.396 mm | 156.22 mm | 523.3 mm | 209.83 mm | 209.83 mm | 52.33 mm |
| Tolerance thickness | ± 0.2 mm | ± 0.2 mm | ± 0.2 mm | ± 0.1 mm | ± 0.15 mm | ± 0.1 mm | ± 0.1 mm | ± 0.2 mm | ± 0.2 mm | ± 0.2 mm | ± 0.2 mm | ± 0.2 mm | ± 0.1 mm | ± 0.2 mm |
| Optic Edge Thickness | 7.2 mm | 2.7 mm | 3.9 mm | 3.5 mm | 3.5 mm | 1.9 mm | 2.3 mm | 4.5 mm | 5.6 mm | 2.3 mm | 2.8 mm | 2.3 mm | 1.7 mm | 4.6 mm |
| Optic Centering Accuracy (min,sec) | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' |
| Tolerance of optic size | - 0.13 mm | - 0.13 mm | - 0.13 mm | - 0.12 mm | - 0.09 mm | - 0.12 mm | - 0.12 mm | - 0.13 mm | - 0.13 mm | - 0.13 mm | - 0.16 mm | - 0.15 mm | - 0.12 mm | - 0.15 mm |
| Height | 3.27 mm | 0.6 mm | 1.21 mm | 0.98 mm | 1.24 mm | 0.19 mm | 0.39 mm | 1.53 mm | 2.07 mm | 0.4 mm | 0.38 mm | 0.39 mm | 0.1 mm | 1.56 mm |
| f' at X nm |
-19.84 mm -19.98 mm -20.31 mm |
-100.4 mm -101.1 mm -102.78 mm |
-50.2 mm -50.55 mm -51.39 mm |
-19.98 mm -20.12 mm -20.46 mm |
-10.12 mm -10.19 mm -10.36 mm |
-100.4 mm -101.1 mm -102.8 mm |
-50.2 mm -50.55 mm -51.4 mm |
-40.11 mm -40.39 mm -41.07 mm |
-30.02 mm -30.23 mm -30.73 mm |
-150.34 mm -151.4 mm -153.91 mm |
-504.08 mm -507.64 mm -516.06 mm |
-202.0 mm -203.4 mm -206.8 mm |
-202.0 mm -203.4 mm -206.8 mm |
-50.2 mm -50.88 mm -51.4 mm |
| Coating Specification | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable |
| Part Number | G313205322 | G313216322 | G313215322 | G313373322 | G313210322 | G313375322 | G313374322 | G313214322 | G313206322 | G313217322 | G313249322 | G313339322 | G313376322 | G313337322 |
Tight manufacturing tolerances for excellent performance and precision mounting
Standard VIS coating: ARB2 VIS (450–700 nm), designed to maximize transmission across the visible spectrum
Unmounted lenses offer flexibility for custom integration into your optical system
ZEMAX files available, enabling easy system design and simulation
| Product | Biconcave lens; N-BK 7; D=22.4; F=-20 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-100 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-50 [ARB2-VIS] | Biconcave lens; N-BK 7; D=12.7; F=-20 [ARB2-VIS] | Biconcave lens; N-BK 7; D=10; F=-10 [ARB2-VIS] | Biconcave lens; N-BK 7; D=12.7; F=-100 [ARB2-VIS] | Biconcave lens; N-BK 7; D=12.7; F=-50 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-40 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-30 [ARB2-VIS] | Biconcave lens; N-BK 7; D=22.4; F=-150 [ARB2-VIS] | Biconcave lens; N-BK 7; D=40; F=-500 [ARB2-VIS] | Biconcave lens; N-BK 7; D=25.4; F=-200 [ARB2-VIS] | Biconcave lens; N-BK 7; D=12.7; F=-200 [ARB2-VIS] | Biconcave lens; N-BK 7; D=25.4; F=-50 [ARB2-VIS] |
| Optic Size | Ø 22.4 mm | Ø 22.4 mm | Ø 22.4 mm | Ø 12.7 mm | Ø 10.0 mm | Ø 12.7 mm | Ø 12.7 mm | Ø 22.4 mm | Ø 22.4 mm | Ø 22.4 mm | Ø 40.0 mm | Ø 25.4 mm | Ø 12.7 mm | Ø 25.4 mm |
| Focal Length (+/-) | -20.0 mm | -100.0 mm | -50.0 mm | -20.0 mm | -10.0 mm | -100.0 mm | -50.0 mm | -40.0 mm | -30.0 mm | -150.0 mm | -500.0 mm | -200.0 mm | -200.0 mm | -50.0 mm |
| Optic Substrate | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 | N-BK7 |
| Coating | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS | ARB 2 VIS |
| Optic Center Thickness | 1.5 mm | 1.5 mm | 1.5 mm | 1.5 mm | 1.0 mm | 1.5 mm | 1.5 mm | 1.5 mm | 1.5 mm | 1.5 mm | 2.0 mm | 1.5 mm | 1.5 mm | 1.5 mm |
| Radius of Curvature 1 | -20.833 mm | -104.41 mm | -52.33 mm | -20.983 mm | -10.669 mm | -104.41 mm | -52.33 mm | -41.867 mm | -31.396 mm | -156.22 mm | -523.3 mm | -209.83 mm | -209.83 mm | -52.33 mm |
| Radius of Curvature 2 | 20.833 mm | 104.41 mm | 52.33 mm | 20.983 mm | 10.669 mm | 104.41 mm | 52.33 mm | 41.867 mm | 31.396 mm | 156.22 mm | 523.3 mm | 209.83 mm | 209.83 mm | 52.33 mm |
| Tolerance thickness | ± 0.2 mm | ± 0.2 mm | ± 0.2 mm | ± 0.1 mm | ± 0.15 mm | ± 0.1 mm | ± 0.1 mm | ± 0.2 mm | ± 0.2 mm | ± 0.2 mm | ± 0.2 mm | ± 0.2 mm | ± 0.1 mm | ± 0.2 mm |
| Optic Edge Thickness | 7.2 mm | 2.7 mm | 3.9 mm | 3.5 mm | 3.5 mm | 1.9 mm | 2.3 mm | 4.5 mm | 5.6 mm | 2.3 mm | 2.8 mm | 2.3 mm | 1.7 mm | 4.6 mm |
| Optic Centering Accuracy (min,sec) | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' | 10.0 ' |
| Tolerance of optic size | - 0.13 mm | - 0.13 mm | - 0.13 mm | - 0.12 mm | - 0.09 mm | - 0.12 mm | - 0.12 mm | - 0.13 mm | - 0.13 mm | - 0.13 mm | - 0.16 mm | - 0.15 mm | - 0.12 mm | - 0.15 mm |
| Height | 3.27 mm | 0.6 mm | 1.21 mm | 0.98 mm | 1.24 mm | 0.19 mm | 0.39 mm | 1.53 mm | 2.07 mm | 0.4 mm | 0.38 mm | 0.39 mm | 0.1 mm | 1.56 mm |
| f' at X nm |
-19.84 mm -19.98 mm -20.31 mm |
-100.4 mm -101.1 mm -102.78 mm |
-50.2 mm -50.55 mm -51.39 mm |
-19.98 mm -20.12 mm -20.46 mm |
-10.12 mm -10.19 mm -10.36 mm |
-100.4 mm -101.1 mm -102.8 mm |
-50.2 mm -50.55 mm -51.4 mm |
-40.11 mm -40.39 mm -41.07 mm |
-30.02 mm -30.23 mm -30.73 mm |
-150.34 mm -151.4 mm -153.91 mm |
-504.08 mm -507.64 mm -516.06 mm |
-202.0 mm -203.4 mm -206.8 mm |
-202.0 mm -203.4 mm -206.8 mm |
-50.2 mm -50.88 mm -51.4 mm |
| Coating Specification | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable | Selectable |
| Part Number | G313205322 | G313216322 | G313215322 | G313373322 | G313210322 | G313375322 | G313374322 | G313214322 | G313206322 | G313217322 | G313249322 | G313339322 | G313376322 | G313337322 |
Tight manufacturing tolerances for excellent performance and precision mounting
Standard VIS coating: ARB2 VIS (450–700 nm), designed to maximize transmission across the visible spectrum
Unmounted lenses offer flexibility for custom integration into your optical system
ZEMAX files available, enabling easy system design and simulation