Achromatic Doublet Lens, Visible, 50.8 mm, 500 mm EFL, 430-700 nm

The PAC091AR.14 Visible Achromatic Doublet Lens is a 430 to 700 nm antireflection coated, 2 inch (50.8 mm) diameter, N-BK7 and N-SF5 precision achromatic doublet lens with an effective focal length of 500 mm. This achromat is computer designed to effectively minimize spherical aberration and coma when operating at infinite conjugate ratio, yielding smaller focused spot sizes. Unlike singlet lenses, this results in a constant focal length independent of aperture and far better off-axis performance. Achromats are superior to singlet lenses for monochromatic applications at any visible wavelength.

Specifications

Technical Specs

Lens Type
Achromatic Doublet
Lens Shape
Plano-Convex
Diameter
50.8 mm
Antireflection Coating
430-700 nm
Coating Type
Visible Multilayer
Coating Code
AR.14
Damage Threshold
1.0 J/cm² @ 1064 nm, 10 ns , 10 Hz
Transmission
T>97%
Lens Material
N-BK7/N-SF5
Surface Quality
40-20 scratch-dig
Surface Accuracy, Irregularity
λ/4
Surface Accuracy, Power
1.5 λ
Effective Focal Length (EFL)
500 mm
Back Focal Length (BFL)
494.6 mm
F/#
9.8
Radius of Curvature (R)
303.919 mm

Radius 2
-224.504 mm
Radius 3
-673.469 mm
Edge Thickness (Te)
10.1 mm
Center Thickness (Tc)
11.66 mm
Thickness, Center 1
7.33 mm
Thickness, Center 2
4.33 mm
Orientation
Steepest convex surface should face the infinite conjugate
Design Wavelengths
589 nm
Centration
≤3 arc min
Diameter Tolerance
+0/-0.1 mm
Focal Length Tolerance
±2.0%
Center Thickness Tolerance
±0.4 mm
Clear Aperture
90% of central diameter
Cleaning
See How to Clean Optics

Lens Type
Achromatic Doublet
Lens Shape
Plano-Convex
Diameter
50.8 mm
Antireflection Coating
430-700 nm
Coating Type
Visible Multilayer
Coating Code
AR.14
Damage Threshold
1.0 J/cm² @ 1064 nm, 10 ns , 10 Hz
Transmission
T>97%
Lens Material
N-BK7/N-SF5
Surface Quality
40-20 scratch-dig
Surface Accuracy, Irregularity
λ/4
Surface Accuracy, Power
1.5 λ
Effective Focal Length (EFL)
500 mm
Back Focal Length (BFL)
494.6 mm
F/#
9.8
Radius of Curvature (R)
303.919 mm

Radius 2
-224.504 mm
Radius 3
-673.469 mm
Edge Thickness (Te)
10.1 mm
Center Thickness (Tc)
11.66 mm
Thickness, Center 1
7.33 mm
Thickness, Center 2
4.33 mm
Orientation
Steepest convex surface should face the infinite conjugate
Design Wavelengths
589 nm
Centration
≤3 arc min
Diameter Tolerance
+0/-0.1 mm
Focal Length Tolerance
±2.0%
Center Thickness Tolerance
±0.4 mm
Clear Aperture
90% of central diameter
Cleaning
See How to Clean Optics

Resources & Downloads

Other

PAC091AR.14 RoHS Certificate(709.5 kB, PDF)
AR.14 Raw Data.xlsx(63.9 kB, XLSX)

PAC Series Drawing(164.8 kB, PDF)

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KPX211AR.14Plano-Convex Lens, N-BK7, 50.8 mm Diameter, 500 mm EFL, 430-700 nm	UNIVERSAL	$81
KBX178AR.14Bi-Convex Lens, N-BK7, 50.8 mm Diameter, 500 mm EFL, 430-700nm	UNIVERSAL	$80

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