Bi-Concave Lens, N-BK7, 12.7 mm Diameter, -12.5 mm EFL, Uncoated

The KBC028 Bi-Concave Lens is an uncoated 12.7 mm diameter N-BK7 Bi-concave lens with an effective focal length of -12.5 mm. It is designed to meet the demanding requirements of laser electro-optic applications. Newport's N-BK7 precision bi-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
Bi-Concave
Diameter
12.7 mm
Lens Material
N-BK7
Antireflection Coating
Uncoated
Surface Quality
40-20 scratch-dig
Surface Accuracy, Irregularity
λ/4
Surface Accuracy, Power
1.5 λ
F/#
-0.9
Effective Focal Length (EFL)
-12.5 mm
Back Focal Length (BFL)
-13.29 mm
Radius of Curvature (R)
-13.333 mm
Edge Thickness (Te)
5.07 mm
Center Thickness (Tc)
2.5 mm

Principal Plane 1 (P1)
0.79 mm
Principal Plane 2 (P2)
-0.79 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
Bi-Concave
Diameter
12.7 mm
Lens Material
N-BK7
Antireflection Coating
Uncoated
Surface Quality
40-20 scratch-dig
Surface Accuracy, Irregularity
λ/4
Surface Accuracy, Power
1.5 λ
F/#
-0.9
Effective Focal Length (EFL)
-12.5 mm
Back Focal Length (BFL)
-13.29 mm
Radius of Curvature (R)
-13.333 mm
Edge Thickness (Te)
5.07 mm
Center Thickness (Tc)
2.5 mm

Principal Plane 1 (P1)
0.79 mm
Principal Plane 2 (P2)
-0.79 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

Related Products

Similar

Description	Compatibility	Avail.	Price
SBC034Bi-Concave Lens, Fused Silica, 25.4 mm, -50 mm EFL, Uncoated	UNIVERSAL	Contact Us	$141
KPC025Plano-Concave Lens, N-BK7, 12.7 mm Diameter, -25 mm EFL, Uncoated	UNIVERSAL	In Stock	$40
CSV025Cylindrical Lens, Plano-Concave, 50.8x19 mm, -25.4 mm FL, FS, Uncoated	UNIVERSAL	In Stock	$483
SPC013Plano-Concave Lens, Fused Silica, 12.7 mm, -25 mm EFL, Uncoated	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$171
CKV012Cylindrical Lens, Plano-Concave, N-BK7, 25.4x12.7mm, -12.7mm FL, Uncoated	UNIVERSAL	In Stock	$252

Compatible

Description	Compatibility	Avail.	Price
VLH-1AV-Groove Lens Holder, 0.25 to 1.25 in. Diameter Lenses	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$164
LP-05APrecision Lens Positioner, 0.5 in., 100 TPI XYθXθY, 80 TPI Z	UNIVERSAL	2 Weeks FREE 2-day shipping on thousands of products on Newport.com Learn More	$764
AC-1AVariable Size Lens Mount, 5.0-46.2 mm, Thumbscrew Support Arms	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$59
LCM-1Lens Mount, Self-Centering, 0.125-1.063 in. Diameter Lenses	IMPERIAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$288
LH-0.5AFixed Lens Mount, 0.50 in. (12.7 mm) Diameter, 8-32 Thread, A-LINE	IMPERIAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$20
LT05-10Lens Tube, 1/2 inch diameter lenses, 1 inch length	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$21