Plano-Convex Lens, ValuMax, N-BK7, 25.4 mm, 850 mm EFL, Uncoated

The KPX633 N-BK7 Plano-Convex Lens is an uncoated, 25.4 mm diameter N-BK7 plano-convex lens with an effective focal length of 850 mm. It has = λ/2 surface irregularity, 60-40 scratch-dig. 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
25.4 mm
Lens Material
N-BK7
Antireflection Coating
Uncoated
Surface Quality
60-40 scratch-dig
Surface Accuracy, Irregularity
λ/2
Surface Accuracy, Power
2.5 λ
F/#
33.5
Effective Focal Length (EFL)
850 mm
Back Focal Length (BFL)
847.90 mm
Radius of Curvature (R)
440.912 mm

Center Thickness (Tc)
3.18 mm
Principal Plane 2 (P2)
-2.10 mm
Design Wavelength
546.1 nm
Centration
≤3 arc min
Chamfers
0.25-0.75 mm
Chamfers Angle/Tolerance
45° ±15°, typical
Focal Length Tolerance
±2 %
Diameter Tolerance
+0/-0.15 mm
Center Thickness Tolerance
±0.2 mm
Clear Aperture
≥central 90% of diameter
Cleaning
See How to Clean Optics

Lens Shape
Plano-Convex
Diameter
25.4 mm
Lens Material
N-BK7
Antireflection Coating
Uncoated
Surface Quality
60-40 scratch-dig
Surface Accuracy, Irregularity
λ/2
Surface Accuracy, Power
2.5 λ
F/#
33.5
Effective Focal Length (EFL)
850 mm
Back Focal Length (BFL)
847.90 mm
Radius of Curvature (R)
440.912 mm

Center Thickness (Tc)
3.18 mm
Principal Plane 2 (P2)
-2.10 mm
Design Wavelength
546.1 nm
Centration
≤3 arc min
Chamfers
0.25-0.75 mm
Chamfers Angle/Tolerance
45° ±15°, typical
Focal Length Tolerance
±2 %
Diameter Tolerance
+0/-0.15 mm
Center Thickness Tolerance
±0.2 mm
Clear Aperture
≥central 90% of diameter
Cleaning
See How to Clean Optics

Resources & Downloads

3D Product Models

2D Product Drawings

KPX633_ZEMAX(964 B, ZIP)

Other

KPX633 RoHS Certificate(711 kB, PDF)

Related Products

Similar

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		Plano-Convex Lens, ValuMax, N-BK7, 25.4 mm, 850 mm EFL, 400-700 nm	UNIVERSAL				Learn More

Compatible

Description	Compatibility
Variable Size Lens Mount, 5.0-46.2 mm, Thumbscrew Support Arms	UNIVERSAL	Learn More
Fixed Lens Mount, 0.50 in. (12.7 mm) Diameter, 8-32 Thread, A-LINE	IMPERIAL	Learn More
Precision Lens Positioner, 0.5 in., 100 TPI XYθXθY, 80 TPI Z	UNIVERSAL	Learn More
Lens Tube, 1/2 inch diameter lenses, 1 inch length	UNIVERSAL	Learn More

Need help?

Contact an Applications Specialist by sending us an email