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Large Precision Achromatic Lenses

Offered in Cemented or Air-Spaced Designs
Mounted Versions Available for Easy Integration
Feature MgF₂ Anti-Reflection Coating

TECHSPEC® Large Precision Achromatic Lenses offer near-diffraction limited performance across the designated wavelength range. These color-corrected achromatic lenses feature long focal lengths and are available in either cemented or air-spaced designs. Mounted versions feature a male mounting thread for easy integration into optical systems. Adhesive foil spacers and mounting instructions are included for unmounted, air-spaced achromatic lenses.

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63.5mm Dia x 354.9mm FL Achromat

#31-402

$275.00

Diameter (mm)	63.50
Diameter Tolerance (mm)	+0.0/-0.10
Clear Aperture CA (mm)	62.70
Effective Focal Length EFL (mm)	354.87
Back Focal Length BFL (mm)	344.52
Focal Length Tolerance (%)	±1
Edge Thickness ET (mm)	17.42
Center Thickness CT 1 (mm)	11.94
Center Thickness CT 2 (mm)	8.86
Center Thickness Tolerance (mm)	±0.20
Centering (arcminutes)	5
Radius R₁ (mm)	203.94
Radius R₂ (mm)	-156.41
Radius R₃ (mm)	-156.41
Radius R₄ (mm)	-569.60
Surface Quality	60-40
Bevel	0.4mm x 45°
Substrate	N-BK7/N-SF2
Design Wavelength DWL (nm)	587.6
Coating	MgF₂: ¼λ @ 550nm, R_avg ≤1.75% @ 400 - 700nm
Type	Unmounted, Cemented
RoHS	Exempt

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63.5mm Dia x 486.3mm FL Achromat

#42-817

$275.00

Diameter (mm)	63.50
Diameter Tolerance (mm)	+0.0/-0.08
Clear Aperture CA (mm)	60.00
Effective Focal Length EFL (mm)	486.30
Back Focal Length BFL (mm)	476.42
Focal Length Tolerance (%)	±1
Edge Thickness ET (mm)	19.10
Center Thickness CT 1 (mm)	11.43
Center Thickness CT 2 (mm)	10.16
Center Thickness Tolerance (mm)	±0.38
Centering (arcminutes)	5
Radius R₁ (mm)	290.86
Radius R₂ (mm)	-197.87
Radius R₃ (mm)	-197.87
Radius R₄ (mm)	-680.72
Surface Quality	60-40
Bevel	0.4mm x 45°
Substrate	N-BK7/N-SF2
Design Wavelength DWL (nm)	587.6
Coating	MgF₂: ¼λ @ 550nm, R_avg ≤1.75% @ 400 - 700nm
Type	Unmounted, Cemented
RoHS	Exempt

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76.6mm Dia x 849.9mm FL Achromat

#30-976

$395.00

Diameter (mm)	76.56
Diameter Tolerance (mm)	+0.0/-0.08
Clear Aperture CA (mm)	73.25
Effective Focal Length EFL (mm)	849.96
Back Focal Length BFL (mm)	838.69
Focal Length Tolerance (%)	±1
Edge Thickness ET (mm)	21.16
Center Thickness CT 1 (mm)	13.08
Center Thickness CT 2 (mm)	10.16
Center Thickness Tolerance (mm)	±0.86
Centering (arcminutes)	5
Radius R₁ (mm)	497.21
Radius R₂ (mm)	-345.82
Radius R₃ (mm)	-344.20
Radius R₄ (mm)	-1227.86
Surface Quality	60-40
Bevel	0.4mm x 45°
Substrate	N-BK7/N-SF2
Design Wavelength DWL (nm)	587.6
Coating	MgF₂: ¼λ @ 550nm, R_avg ≤1.75% @ 400 - 700nm
Type	Unmounted, Airspaced 0.10mm
RoHS	Exempt

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76.6mm Dia x 849.9mm FL Achromat, Mtd

#54-567

$575.00

Diameter (mm)	76.56 Lens / 90 Mounted
Diameter Tolerance (mm)	+0.0/-0.08
Clear Aperture CA (mm)	73.25
Effective Focal Length EFL (mm)	849.96
Back Focal Length BFL (mm)	838.69
Focal Length Tolerance (%)	±1
Edge Thickness ET (mm)	21.16
Center Thickness CT 1 (mm)	13.08
Center Thickness CT 2 (mm)	10.16
Center Thickness Tolerance (mm)	±0.86
Thickness with Mount (mm)	28.07
Centering (arcminutes)	5
Radius R₁ (mm)	497.21
Radius R₂ (mm)	-345.82
Radius R₃ (mm)	-344.20
Radius R₄ (mm)	-1227.86
Surface Quality	60-40
Bevel	0.4mm x 45°
Substrate	N-BK7/N-SF2
Design Wavelength DWL (nm)	587.6
Coating	MgF₂: ¼λ @ 550nm, R_avg ≤1.75% @ 400 - 700nm
Type	Mounted, Airspaced 0.10mm
Mounting Threads	M86 x 1.0
RoHS	Exempt

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102.3mm Dia x 1524.7mm FL Achromat

#50-107

$995.00

Diameter (mm)	102.31
Diameter Tolerance (mm)	+0.0/-0.12
Clear Aperture CA (mm)	98.75
Effective Focal Length EFL (mm)	1524.73
Back Focal Length BFL (mm)	1514.53
Focal Length Tolerance (%)	±1
Edge Thickness ET (mm)	19.10
Center Thickness CT 1 (mm)	12.37
Center Thickness CT 2 (mm)	8.76
Center Thickness Tolerance (mm)	±0.86
Centering (arcminutes)	5
Radius R₁ (mm)	908.13
Radius R₂ (mm)	-626.59
Radius R₃ (mm)	-625.40
Radius R₄ (mm)	-2169.77
Surface Quality	60-40
Bevel	0.4mm x 45°
Substrate	N-BK7/N-SF2
Design Wavelength DWL (nm)	587.6
Coating	MgF₂: ¼λ @ 550nm, R_avg ≤1.75% @ 400 - 700nm
Type	Unmounted, Airspaced 0.10mm
RoHS	Exempt

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102.3mm Dia x 1524.7mm FL Achromat, Mtd

#54-568

$1,095.00

Diameter (mm)	102.31 Lens / 116 Mounted
Diameter Tolerance (mm)	+0.0/-0.12
Clear Aperture CA (mm)	98.75
Effective Focal Length EFL (mm)	1524.73
Back Focal Length BFL (mm)	1514.53
Focal Length Tolerance (%)	±1
Edge Thickness ET (mm)	19.10
Center Thickness CT 1 (mm)	12.37
Center Thickness CT 2 (mm)	8.76
Center Thickness Tolerance (mm)	±0.86
Thickness with Mount (mm)	28.35
Centering (arcminutes)	5
Radius R₁ (mm)	908.13
Radius R₂ (mm)	-626.59
Radius R₃ (mm)	-625.40
Radius R₄ (mm)	-2169.77
Surface Quality	60-40
Bevel	0.4mm x 45°
Substrate	N-BK7/N-SF2
Design Wavelength DWL (nm)	587.6
Coating	MgF₂: ¼λ @ 550nm, R_avg ≤1.75% @ 400 - 700nm
Type	Mounted, Airspaced 0.10mm
Mounting Threads	M112 x 1.0
RoHS	Exempt

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128mm Dia x 1900.2mm FL Achromat

#70-163

$1,050.00

Diameter (mm)	128.02
Diameter Tolerance (mm)	+0.0/-0.12
Clear Aperture CA (mm)	124.50
Effective Focal Length EFL (mm)	1900.24
Back Focal Length BFL (mm)	1887.58
Focal Length Tolerance (%)	±1
Edge Thickness ET (mm)	23.77
Center Thickness CT 1 (mm)	15.42
Center Thickness CT 2 (mm)	10.92
Center Thickness Tolerance (mm)	±0.86
Centering (arcminutes)	5
Radius R₁ (mm)	1131.72
Radius R₂ (mm)	-780.87
Radius R₃ (mm)	-779.37
Radius R₄ (mm)	-2704.01
Surface Quality	60-40
Bevel	0.4mm x 45°
Substrate	N-BK7/N-SF2
Design Wavelength DWL (nm)	587.6
Coating	MgF₂: ¼λ @ 550nm, R_avg ≤1.75% @ 400 - 700nm
Type	Unmounted, Airspaced 0.10mm
RoHS	Exempt

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128mm Dia x 1900.2mm FL Achromat, Mtd

#54-569

$1,195.00

Diameter (mm)	128.02 Lens / 140 Mounted
Diameter Tolerance (mm)	+0.0/-0.12
Clear Aperture CA (mm)	124.50
Effective Focal Length EFL (mm)	1900.24
Back Focal Length BFL (mm)	1887.58
Focal Length Tolerance (%)	±1
Edge Thickness ET (mm)	23.77
Center Thickness CT 1 (mm)	15.42
Center Thickness CT 2 (mm)	10.92
Center Thickness Tolerance (mm)	±0.86
Thickness with Mount (mm)	33.07
Centering (arcminutes)	5
Radius R₁ (mm)	1131.72
Radius R₂ (mm)	-780.87
Radius R₃ (mm)	-779.37
Radius R₄ (mm)	-2704.01
Surface Quality	60-40
Bevel	0.4mm x 45°
Substrate	N-BK7/N-SF2
Design Wavelength DWL (nm)	587.6
Coating	MgF₂: ¼λ @ 550nm, R_avg ≤1.75% @ 400 - 700nm
Type	Mounted, Airspaced 0.10mm
Mounting Threads	M138 x 1.0
RoHS	Exempt

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Large Precision Achromatic Lenses

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