Plano-Convex Lens, N-BK7, 12.7 mm Diameter, 250 mm EFL, 650-1000 nm

The KPX073AR.16 N-BK7 Precision Plano-Convex Lens is a 650 to 1000 nm anti-reflection coated, 1/2 inch (12.7 mm) diameter, N-BK7 plano-convex lens with an effective focal length of 250 mm. It has = λ/4 surface irregularity, 40-20 scratch-dig, and is designed to meet the demanding requirements of laser electro-optic applications. It is manufactured from fine annealed optical glass and polished to tight tolerances using master test plates ensures minimum wavefront distortion. Tight surface quality tolerances minimize scatter and unwanted diffraction effects. N-BK7 is an excellent material for most visible and near infrared applications. It is the most common optical glass, and it provides great performance at a good value.

Specifications

Technical Specs

Lens Shape
Plano-Convex
Diameter
12.7 mm
Lens Material
N-BK7
Antireflection Coating
650-1000 nm
Coating Type
NIR Multilayer
Coating Code
AR.16
Damage Threshold
7.5 J/cm², 10 ns pulses, 10 Hz at 1064 nm
Surface Quality
40-20 scratch-dig
Surface Accuracy, Irregularity
λ/4
Surface Accuracy, Power
1.5 λ
F/#
19.6
Effective Focal Length (EFL)
250 mm
Back Focal Length (BFL)
247.91 mm
Radius of Curvature (R)
129.200 mm

Edge Thickness (Te)
3.0 mm
Center Thickness (Tc)
3.156 mm
Principal Plane 2 (P2)
-2.08 mm
Design Wavelength
589 nm
Centration
≤3 arc min
Chamfers
0–0.8 mm face width
Chamfers Angle/Tolerance
45° ±15°, typical
Focal Length Tolerance
±1 %
Diameter Tolerance
+0/-0.1 mm
Center Thickness Tolerance
±0.1 mm
Clear Aperture
≥central 90% of diameter
Cleaning
See How to Clean Optics

Lens Shape
Plano-Convex
Diameter
12.7 mm
Lens Material
N-BK7
Antireflection Coating
650-1000 nm
Coating Type
NIR Multilayer
Coating Code
AR.16
Damage Threshold
7.5 J/cm², 10 ns pulses, 10 Hz at 1064 nm
Surface Quality
40-20 scratch-dig
Surface Accuracy, Irregularity
λ/4
Surface Accuracy, Power
1.5 λ
F/#
19.6
Effective Focal Length (EFL)
250 mm
Back Focal Length (BFL)
247.91 mm
Radius of Curvature (R)
129.200 mm

Edge Thickness (Te)
3.0 mm
Center Thickness (Tc)
3.156 mm
Principal Plane 2 (P2)
-2.08 mm
Design Wavelength
589 nm
Centration
≤3 arc min
Chamfers
0–0.8 mm face width
Chamfers Angle/Tolerance
45° ±15°, typical
Focal Length Tolerance
±1 %
Diameter Tolerance
+0/-0.1 mm
Center Thickness Tolerance
±0.1 mm
Clear Aperture
≥central 90% of diameter
Cleaning
See How to Clean Optics

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