Achromatic Doublet Lens, Visible, 25.4 mm, 175 mm EFL, 400-700 nm

The PAC061 Visible Achromatic Doublet Lens is a 400 to 700 nm antireflection coated, 1 inch (25.4 mm) diameter, N-BK7 and N-SF5 precision achromatic doublet lens with an effective focal length of 175 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
Diameter
25.4 mm
Antireflection Coating
400-700 nm
Coating Type
Visible Single-Layer MgF₂
Damage Threshold
1.0 J/cm² @ 1064 nm, 10 ns , 10 Hz
Transmission
T>95%
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)
175 mm
Back Focal Length (BFL)
172.1 mm
F/#
6.9
Radius of Curvature (R)
106.550 mm
Radius 2
-78.493 mm

Radius 3
-234.186 mm
Edge Thickness (Te)
5.2 mm
Center Thickness (Tc)
6.3 mm
Thickness, Center 1
3.8 mm
Thickness, Center 2
2.5 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
±0.2 mm
Cleaning
See How to Clean Optics

Lens Type
Achromatic Doublet
Diameter
25.4 mm
Antireflection Coating
400-700 nm
Coating Type
Visible Single-Layer MgF₂
Damage Threshold
1.0 J/cm² @ 1064 nm, 10 ns , 10 Hz
Transmission
T>95%
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)
175 mm
Back Focal Length (BFL)
172.1 mm
F/#
6.9
Radius of Curvature (R)
106.550 mm
Radius 2
-78.493 mm

Radius 3
-234.186 mm
Edge Thickness (Te)
5.2 mm
Center Thickness (Tc)
6.3 mm
Thickness, Center 1
3.8 mm
Thickness, Center 2
2.5 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
±0.2 mm
Cleaning
See How to Clean Optics

Resources & Downloads

Software

PAC061_ZEMAX(1,010 B, ZIP)

Other

PAC061 RoHS Certificate(705.7 kB, PDF)
MgF₂ Raw Data.xlsx(63.2 kB, XLSX)

PAC Series Drawing(164.8 kB, PDF)

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