• Mounted N-BK7 Lenses for Easy Integration into Laser Systems
• Positive Focal Lengths from 60mm to 120mm
• AR Coated for Minimum Refl ection at 532 and 1064nm
TECHSPEC® Laser Focusing Singlet Lenses are an economical and convenient option for focusing light from
Nd:YAG lasers systems and other laser systems emitting between 500 - 1100nm. These N-BK7 lenses are
mounted in an anodized aluminum housing for easy integration into laser systems. Each housing is engraved
with the stock number, focal length, and coating name for identifi cation. TECHSPEC® Laser Focusing Singlet
Lenses are coated with an Nd:YAG broadband antirefl ection coating (YAG-BBAR), providing less than 0.25%
refl ectance at the laser lines of 532nm and 1064nm. Please contact us if your laser system requires a custom
TECHSPEC® Laser Focusing Singlet Lens with one of our standard TECHSPEC® Plano-Convex (PCX) Lenses.
Substrate: N-BK7
Clear Aperture (mm): 28.0
Focal Length Tolerance (%): ±1
Design Wavelength (nm): 587.6
Irregularity (P-V): l/4
Surface Quality: 40-20
Diameter Tolerance (mm): +0.0/-0.025
Centering (arcmin): <1
Housing Diameter (mm): 41.0
YAG-BBAR Coating Specifi cations: 500 - 1100nm, see page 9 for details Working
TECHSPEC® Laser Focusing Singlet Lenses
Effective Focal
Working Distance
Working Distance
Length (mm)
@ 532nm (mm)
@ 1064nm (mm)
Housing
Length (mm) Stock No. Price
60.0 47.7 48.3 24.6 #12-318 £123.25
75.0 61.5 62.2 28.9 #12-319 £123.25
100.0 73.3 73.7 33.6 #12-320 £123.25
120.0 111.6 111.5 24.0 #12-321 £123.25
• Color Corrected at 632.8nm and 1064nm
• Optimized to Reduce Spherical Aberration
• Minimizes Spot Size for Materials Processing
TECHSPEC® Nd:YAG Air-Spaced Achromatic Focusing Doublets achieve diff raction limited performance at
1064nm. These lenses are designed for use with high power Nd:YAG laser systems utilizing a HeNe laser for
alignment and also for laser welding and processing of aluminum, steel, and plastics. Filling the performance
gap between more economical single element spherical lenses with worse performance and aspheres with diffraction
limited performance, these lenses provide achromatic performance that single lens element solutions
cannot. TECHSPEC® Nd:YAG Air-Spaced Achromatic Focusing Doublets are ideal in aluminum, plastic, and
other material laser processing applications.
1.064
Focal Shift
BFL from
Housing
UV-to-NIR Corrected Triplets
• Broadband Color Corrected Design from
193nm-1000nm
• Infi nite Conjugate Triplet Lenses
• Air-Spaced Calcium Fluoride and Fused Silica
Elements
Glass Type: ArF Grade UV Fused Silica and Calcium Fluoride
Clear Aperture (mm): 22.5
Surface Quality: 60-40
Coating: Uncoated or l/4 MgF2 @ 600nm
Focal Length Tolerance (%): ±0.5 at 248mm (EFL ≤45mm)
±1.5 at 248mm (EFL >45mm)
Housing Diameter (mm): 30.00 ±0.05
Housing Length Tolerance (mm): ±0.05
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Laser Focusing Singlet Lenses
Nd:YAG Air-Spaced Achromatic Focusing Doublets
TECHSPEC® Nd:YAG Air-Spaced Achromatic Focusing Doublets
f/# EFL @ 632.8nm
(mm)
Coating Specifi cation
(Dual V-Coat)
Clear Aperture
(mm)
Surface
Quality
Housing
Diameter (mm)
Length
(mm)
Stock
No. Price
f/3.0 80.00 Rabs <0.5% @ 1030 - 1090nm
Rabs <1.0% @ 632.8nm 27.00 20-10 36.00 16.10 #12-163 £595.00
f/3.7 100.00 Rabs <0.5% @ 1030 - 1090nm
Rabs <1.0% @ 632.8nm 27.00 20-10 36.00 16.10 #12-160 £595.00
f/5.6 150.00 Rabs <0.5% @ 1030 - 1090nm
Rabs <1.0% @ 632.8nm 27.00 20-10 36.00 16.10 #12-159 £595.00
Distance
Housing Length
Back Focal
Length
Housing
Diameter
1.00
0.90
0.80
0.70
0.633
-200.00 -160.00 -120.00 -80.0 -40.0
0 80.0 120.0 160.0 200.0
Focal Shift in μm
Wavelength in μm
40.0
Ø30mm
Length
CaF2 Fused Silica CaF2
BFL
Specifi cations
EFL
193 - 400nm 400 - 1000nm 193 - 1000nm
Chromatic Shift RMS Spot Radius Chromatic Shift RMS Spot Radius Chromatic Shift RMS Spot Radius
36mm 1.8mm 240μm 0.4mm 214μm 2.2mm 268μm
45mm 1.1mm 88μm 0.3mm 69μm 1.3mm 95μm
90mm 2.0mm 64μm 0.6mm 38μm 2.5mm 69μm
135mm 1.6mm 49μm 0.6mm 31μm 2.1mm 51μm
180mm 1.4mm 46μm 0.6mm 28μm 1.9mm 45μm
TECHSPEC® UV-to-NIR Corrected Triplets
f/# EFL @ 248nm
(mm)
BFL @ 248nm
(mm)
BFL From
Housing (mm)
Length
(mm)
Uncoated MgF2 Coated
Stock No. Price Stock No. Price
f/1.6 36.00 24.98 24.5 27.0 #65-029 £1,933.75 #65-033 £2,125.00
f/2.0 45.00 34.84 33.3 27.5 #47-613 £1,848.75 #64-837 £2,040.00
f/4.0 90.00 84.76 81.9 20.5 #47-311 £1,742.50 #64-838 £1,933.75
f/6.0 135.00 129.31 126.9 20.5 #47-312 £1,742.50 #64-839 £1,933.75
f/8.0 180.00 174.62 172.3 20.5 #47-313 £1,742.50 #64-840 £1,933.75
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