Focusing Lens, 38.1 mm, N-BK7/A, Bi-Convex, 50 mm EFL, Uncoated

Uncoated N-BK7 Bi-Convex Lenses

The 39223 Focusing Lens is used with the 77259 Focusing Lens Assembly. It is a 1.5 inch (38.1 mm) diameter, Borosilicate Crown Glass, Bi-convex Lens with a 50 mm Focal Length. Bi-convex lenses are for imaging with little change in magnification. 330 to 2200 nm wavelength range.

Specifications

Technical Specs

Lens Shape
Bi-Convex
Diameter
38.1 mm
Lens Material
N-BK7
Antireflection Coating
Uncoated
Surface Quality
60-40 scratch-dig
F/#
1.3
Effective Focal Length (EFL)
50.0 mm
Back Focal Length (BFL)
49.4 mm
Edge Thickness (T<sub>e</sub>)
2.0 mm

Center Thickness (T<sub>c</sub>)
9.1 mm
Principal Plane 2 (P<sub>2</sub>)
-0.6 mm
Design Wavelength
589 nm
Centration
3 arc min
Focal Length Tolerance
±2 %
Diameter Tolerance
+0/-0.25 mm
Center Thickness Tolerance
±0.25 mm

Lens Shape
Bi-Convex
Diameter
38.1 mm
Lens Material
N-BK7
Antireflection Coating
Uncoated
Surface Quality
60-40 scratch-dig
F/#
1.3
Effective Focal Length (EFL)
50.0 mm
Back Focal Length (BFL)
49.4 mm
Edge Thickness (T<sub>e</sub>)
2.0 mm

Center Thickness (T<sub>c</sub>)
9.1 mm
Principal Plane 2 (P<sub>2</sub>)
-0.6 mm
Design Wavelength
589 nm
Centration
3 arc min
Focal Length Tolerance
±2 %
Diameter Tolerance
+0/-0.25 mm
Center Thickness Tolerance
±0.25 mm

Resources & Downloads

Other

39223 RoHS Certificate(265.5 kB, PDF)
39223_ROHS2-2021.pdf(279.8 kB, PDF)

2D Product Drawings

BI-CONVE-XLE-S(89.3 kB, PDF)

Related Products

Compatible

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		77259XYZ Focusing Lens Assembly, Req. 38.1 mm Plano-Convex or Bi-Convex Lens	UNIVERSAL		Contact Us	$1,375