Symmetric-Concave Singlet Lenses

Mounted N-BK7 Symmetric-Concave Lenses, NIR

Our LINOS® symmetric-concave lenses are made from high-quality N-BK7 optical glass with NIR coating and are offered in various focal lengths and diameters to support diverse optical applications. They are ideal for beam expansion, controlled divergence of collimated light, and systems requiring low spherical aberration and balanced performance. Each lens is produced to strict tolerances using N-BK7 glass from trusted suppliers, ensuring consistent optical quality. Our product range includes both mounted lenses with a black-anodized, engraved aluminum mount and unmounted versions for flexible integration.

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Our mounted symmetric-concave lenses are crafted from high-quality N-BK7 glass and integrate seamlessly into LINOS Microbench and Nanobench systems. Tight focal-length tolerances ensure consistent system integration and reliable optical behavior.

These lenses feature two equal radii of curvature, delivering precise optical performance for applications that require controlled beam divergence. The ARB2 NIR broadband anti-reflection coating ensures high transmission from 725 to 1050 nm and offers excellent laser damage resistance, resulting in a high damage threshold and reliable performance in demanding environments.

ZEMAX files are supplied to assist with optical design and simulation. For customized requirements or higher-volume manufacturing, contact us for a quote taiilored to your technical specifications.

Image for asset 291769

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%

Image for asset 291769

Note: Dmech: outer mount, DCA: clear aperture, Doptical: optical size, RR: retaining ring

Specifications broadband anti-reflective coating ARB2 NIR:

ARB 2 NIR Reflection Spectrum

  • 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: 725–1050 nm
  • Design adaptable to the spectral range of 600 nm ≤ λ ≤ 1400 nm and to higher angles of incidence.

Product Biconcave lens; N-BK 7; D=10; F=-10; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=12.7; F=-50; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-20; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-50; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-40; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-150; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=12.7; F=-20; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=12.7; F=-100; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-30; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-100; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=25.4; F=-50; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=12.7; F=-200; mounted [ARB2-NIR]
Optic Size Ø 10.0 mm Ø 12.7 mm Ø 22.4 mm Ø 22.4 mm Ø 22.4 mm Ø 22.4 mm Ø 12.7 mm Ø 12.7 mm Ø 22.4 mm Ø 22.4 mm Ø 25.4 mm Ø 12.7 mm
Focal Length (+/-) -10.0 mm -50.0 mm -20.0 mm -50.0 mm -40.0 mm -150.0 mm -20.0 mm -100.0 mm -30.0 mm -100.0 mm -50.0 mm -200.0 mm
Mount Nanobench Nanobench Microbench Microbench Microbench Microbench Nanobench Nanobench Microbench Microbench Microbench Nanobench
Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted
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
Coating ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR
Optic Center Thickness 1.0 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm
Length 8.0 mm 8.0 mm 10.0 mm 10.0 mm 10.0 mm 10.0 mm 8.0 mm 8.0 mm 10.0 mm 10.0 mm 12.0 mm 8.0 mm
Radius of Curvature 1 -10.669 mm -52.33 mm -20.833 mm -52.33 mm -41.867 mm -156.22 mm -20.983 mm -104.41 mm -31.396 mm -104.41 mm -52.33 mm -209.83 mm
Radius of Curvature 2 10.669 mm 52.33 mm 20.833 mm 52.33 mm 41.867 mm 156.22 mm 20.983 mm 104.41 mm 31.396 mm 104.41 mm 52.33 mm 209.83 mm
Tolerance thickness ± 0.15 mm ± 0.1 mm ± 0.2 mm ± 0.2 mm ± 0.2 mm ± 0.2 mm ± 0.1 mm ± 0.1 mm ± 0.2 mm ± 0.2 mm ± 0.2 mm ± 0.1 mm
Optic Edge Thickness 3.5 mm 2.3 mm 7.2 mm 3.9 mm 4.5 mm 2.3 mm 3.5 mm 1.9 mm 5.6 mm 2.7 mm 4.6 mm 1.7 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 '
Tolerance of optic size - 0.09 mm - 0.12 mm - 0.13 mm - 0.13 mm - 0.13 mm - 0.13 mm - 0.12 mm - 0.12 mm - 0.13 mm - 0.13 mm - 0.15 mm - 0.12 mm
Height 1.24 mm 0.39 mm 3.27 mm 1.21 mm 1.53 mm 0.4 mm 0.98 mm 0.19 mm 2.07 mm 0.6 mm 1.56 mm 0.1 mm
f' at X nm -10.12 mm
-10.19 mm
-10.36 mm 		-50.2 mm
-50.55 mm
-51.4 mm 		-19.84 mm
-19.98 mm
-20.31 mm 		-50.2 mm
-50.55 mm
-51.39 mm 		-40.11 mm
-40.39 mm
-41.07 mm 		-150.34 mm
-151.4 mm
-153.91 mm 		-19.98 mm
-20.12 mm
-20.46 mm 		-100.4 mm
-101.1 mm
-102.8 mm 		-30.02 mm
-30.23 mm
-30.73 mm 		-100.4 mm
-101.1 mm
-102.78 mm 		-50.2 mm
-50.88 mm
-51.4 mm 		-202.0 mm
-203.4 mm
-206.8 mm
Outer Mount Diameter 16.0 mm 16.0 mm 25.0 mm 25.0 mm 25.0 mm 25.0 mm 16.0 mm 16.0 mm 25.0 mm 25.0 mm 30.0 mm 16.0 mm
Clear aperture 9.0 mm 11.5 mm 21.4 mm 21.4 mm 21.4 mm 21.4 mm 11.5 mm 11.5 mm 21.4 mm 21.4 mm 24.0 mm 11.5 mm
Coating Specification Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable
Part Number G052401525 G052403525 G063058525 G063061525 G063060525 G063063525 G052402525 G052404525 G063059525 G063062525 G063892525 G052405525

  • 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

  • Mounted lenses can integrate seamlessly into LINOS Microbench and Nanobench systems

  • Mount made of black-anodized aluminum with laser engraving

  • ZEMAX files available, enabling easy system design and simulation

ZEMAX Files for Symmetric-Concave Lenses
Product Biconcave lens; N-BK 7; D=10; F=-10; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=12.7; F=-50; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-20; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-50; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-40; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-150; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=12.7; F=-20; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=12.7; F=-100; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-30; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=22.4; F=-100; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=25.4; F=-50; mounted [ARB2-NIR] Biconcave lens; N-BK 7; D=12.7; F=-200; mounted [ARB2-NIR]
Optic Size Ø 10.0 mm Ø 12.7 mm Ø 22.4 mm Ø 22.4 mm Ø 22.4 mm Ø 22.4 mm Ø 12.7 mm Ø 12.7 mm Ø 22.4 mm Ø 22.4 mm Ø 25.4 mm Ø 12.7 mm
Focal Length (+/-) -10.0 mm -50.0 mm -20.0 mm -50.0 mm -40.0 mm -150.0 mm -20.0 mm -100.0 mm -30.0 mm -100.0 mm -50.0 mm -200.0 mm
Mount Nanobench Nanobench Microbench Microbench Microbench Microbench Nanobench Nanobench Microbench Microbench Microbench Nanobench
Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted Mounted
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
Coating ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR ARB 2 NIR
Optic Center Thickness 1.0 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm 1.5 mm
Length 8.0 mm 8.0 mm 10.0 mm 10.0 mm 10.0 mm 10.0 mm 8.0 mm 8.0 mm 10.0 mm 10.0 mm 12.0 mm 8.0 mm
Radius of Curvature 1 -10.669 mm -52.33 mm -20.833 mm -52.33 mm -41.867 mm -156.22 mm -20.983 mm -104.41 mm -31.396 mm -104.41 mm -52.33 mm -209.83 mm
Radius of Curvature 2 10.669 mm 52.33 mm 20.833 mm 52.33 mm 41.867 mm 156.22 mm 20.983 mm 104.41 mm 31.396 mm 104.41 mm 52.33 mm 209.83 mm
Tolerance thickness ± 0.15 mm ± 0.1 mm ± 0.2 mm ± 0.2 mm ± 0.2 mm ± 0.2 mm ± 0.1 mm ± 0.1 mm ± 0.2 mm ± 0.2 mm ± 0.2 mm ± 0.1 mm
Optic Edge Thickness 3.5 mm 2.3 mm 7.2 mm 3.9 mm 4.5 mm 2.3 mm 3.5 mm 1.9 mm 5.6 mm 2.7 mm 4.6 mm 1.7 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 '
Tolerance of optic size - 0.09 mm - 0.12 mm - 0.13 mm - 0.13 mm - 0.13 mm - 0.13 mm - 0.12 mm - 0.12 mm - 0.13 mm - 0.13 mm - 0.15 mm - 0.12 mm
Height 1.24 mm 0.39 mm 3.27 mm 1.21 mm 1.53 mm 0.4 mm 0.98 mm 0.19 mm 2.07 mm 0.6 mm 1.56 mm 0.1 mm
f' at X nm -10.12 mm
-10.19 mm
-10.36 mm 		-50.2 mm
-50.55 mm
-51.4 mm 		-19.84 mm
-19.98 mm
-20.31 mm 		-50.2 mm
-50.55 mm
-51.39 mm 		-40.11 mm
-40.39 mm
-41.07 mm 		-150.34 mm
-151.4 mm
-153.91 mm 		-19.98 mm
-20.12 mm
-20.46 mm 		-100.4 mm
-101.1 mm
-102.8 mm 		-30.02 mm
-30.23 mm
-30.73 mm 		-100.4 mm
-101.1 mm
-102.78 mm 		-50.2 mm
-50.88 mm
-51.4 mm 		-202.0 mm
-203.4 mm
-206.8 mm
Outer Mount Diameter 16.0 mm 16.0 mm 25.0 mm 25.0 mm 25.0 mm 25.0 mm 16.0 mm 16.0 mm 25.0 mm 25.0 mm 30.0 mm 16.0 mm
Clear aperture 9.0 mm 11.5 mm 21.4 mm 21.4 mm 21.4 mm 21.4 mm 11.5 mm 11.5 mm 21.4 mm 21.4 mm 24.0 mm 11.5 mm
Coating Specification Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable Selectable
Part Number G052401525 G052403525 G063058525 G063061525 G063060525 G063063525 G052402525 G052404525 G063059525 G063062525 G063892525 G052405525

  • 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

  • Mounted lenses can integrate seamlessly into LINOS Microbench and Nanobench systems

  • Mount made of black-anodized aluminum with laser engraving

  • ZEMAX files available, enabling easy system design and simulation

ZEMAX Files for Symmetric-Concave Lenses
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