Plano-Concave Lens, N-BK7, 25.4 mm Diameter, -50 mm EFL, 1000-1550 nm

The KPC040AR.18 N-BK7 Plano-Concave Lens is a 1000 to 1550 nm anti-reflection coated, 25.4 mm diameter, N-BK7, plano-concave lens with an effective focal length of -50 mm. It is designed to meet the demanding requirements of laser electro-optic applications. Newport's N-BK7 precision plano-concave lenses are manufactured from fine annealed optical glass and are polished to tight tolerances using master test plates to ensure minimum wavefront distortion.

Specifications

Technical Specs

Lens Shape
Plano-Concave
Diameter
25.4 mm
Lens Material
N-BK7
Antireflection Coating
1000-1550 nm
Coating Type
IR Multilayer
Coating Code
AR.18
Damage Threshold
7.5 J/cm², 10 ns pulses, 20 Hz at 1064 nm
Surface Quality
40-20 scratch-dig
Surface Accuracy, Irregularity
λ/4
Surface Accuracy, Power
1.5 λ
F/#
-1.9
Effective Focal Length (EFL)
-50 mm
Back Focal Length (BFL)
-51.64 mm

Edge Thickness (Te)
5.17 mm
Center Thickness (Tc)
2.5 mm
Principal Plane 2 (P2)
-1.64 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-Concave
Diameter
25.4 mm
Lens Material
N-BK7
Antireflection Coating
1000-1550 nm
Coating Type
IR Multilayer
Coating Code
AR.18
Damage Threshold
7.5 J/cm², 10 ns pulses, 20 Hz at 1064 nm
Surface Quality
40-20 scratch-dig
Surface Accuracy, Irregularity
λ/4
Surface Accuracy, Power
1.5 λ
F/#
-1.9
Effective Focal Length (EFL)
-50 mm
Back Focal Length (BFL)
-51.64 mm

Edge Thickness (Te)
5.17 mm
Center Thickness (Tc)
2.5 mm
Principal Plane 2 (P2)
-1.64 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

Resources & Downloads

3D Product Models

2D Product Drawings

PLANOCO1 CAV-S(88 kB, PDF)
KPC040AR.18 Zemax File(5.2 kB, ZMX)

Other

KPC040AR.18 RoHS Certificate(706.9 kB, PDF)
AR.18 Raw Data.xlsx(113.4 kB, XLSX)

Related Products

Compatible

Description	Compatibility
Variable Size Lens Mount, 5.0-46.2 mm, Thumbscrew Support Arms	UNIVERSAL	Learn More
Lens Mount, Self-Centering, 0.125-1.063 in. Diameter Lenses	IMPERIAL	Learn More
Fixed Lens Mount, 1.0 in. (25.4 mm) Diameter, 8-32 Thread, A-LINE	IMPERIAL	Learn More
Precision Lens Positioner, 1.0 in., 100 TPI XYθXθY, 80 TPI Z	UNIVERSAL	Learn More
Lens Tube, 1 inch LT Series, 2 inch length	UNIVERSAL	Learn More
V-Groove Lens Holder, 0.25 to 1.25 in. Diameter Lenses	UNIVERSAL	Learn More

Frequently Purchased Together

Description	Compatibility
Plano-Concave Lens, N-BK7, 25.4 mm Diameter, -200 mm EFL, 1000-1550 nm	UNIVERSAL	Learn More
Platform Optical Mount, ULTIMA<sup>®</sup>, 2.75 x 2.75 in., 3 Locking Allen-Keys	UNIVERSAL	Learn More
Platform Optical Mount, ULTIMA<sup>®</sup>, 1.0 x 1.0 in., (3) 80-TPI Allen-Keys	UNIVERSAL	Learn More

Need help?

Contact an Applications Specialist by sending us an email