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NIR I Coated Double-Concave (DCV) Lenses

AR Coated to Provide <0.5% Reflectance per Surface for 600 - 1050nm
Designed for 0° Angle of Incidence

Double-Concave (DCV) Lenses have two inward curved surfaces and a negative focal length. They are used for image reduction and to spread light.

These lenses are available uncoated or with other Anti-Reflection coating options including: MgF₂, VIS 0°, VIS NIR and NIR II.

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Double-Concave Lens, 6mm Dia. x -6mm FL, NIR-I Coated

#49-540

$36.00

Diameter (mm)	6.00
Diameter Tolerance (mm)	+0.0/-0.10
Clear Aperture CA (mm)	≥90% of Diameter
Effective Focal Length EFL (mm)	-6.00
Back Focal Length BFL (mm)	-6.41
Focal Length Tolerance (%)	±1
Radius R₁=-R₂ (mm)	-9.74
Edge Thickness ET (mm)	2.29
Center Thickness CT (mm)	1.50
Center Thickness Tolerance (mm)	±0.1
Centering (arcminutes)	3 - 5
Surface Quality	40-20
Bevel	0.25mm x 45°
Substrate	N-SF11
Coating	NIR I, R_avg ≤0.5% @ 600 - 1050nm
Typical Energy Density Limit	7 J/cm² @ 1064nm, 10ns
RoHS	Compliant

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Double-Concave Lens, 9mm Dia. x -9mm FL, NIR-I Coated

#49-543

$36.00

Diameter (mm)	9.00
Diameter Tolerance (mm)	+0.0/-0.10
Clear Aperture CA (mm)	≥90% of Diameter
Effective Focal Length EFL (mm)	-9.00
Back Focal Length BFL (mm)	-9.61
Focal Length Tolerance (%)	±1
Radius R₁=-R₂ (mm)	-14.60
Edge Thickness ET (mm)	3.48
Center Thickness CT (mm)	2.25
Center Thickness Tolerance (mm)	±0.1
Centering (arcminutes)	3 - 5
Surface Quality	40-20
Bevel	0.25mm x 45°
Substrate	N-SF11
Coating	NIR I, R_avg ≤0.5% @ 600 - 1050nm
Typical Energy Density Limit	7 J/cm² @ 1064nm, 10ns
RoHS	Exempt

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Double-Concave Lens, 9mm Dia. x -12mm FL, NIR-I Coated

#49-544

$36.00

Diameter (mm)	9.00
Diameter Tolerance (mm)	+0.0/-0.10
Clear Aperture CA (mm)	≥90% of Diameter
Effective Focal Length EFL (mm)	-12.00
Back Focal Length BFL (mm)	-12.41
Focal Length Tolerance (%)	±1
Radius R₁=-R₂ (mm)	-19.16
Edge Thickness ET (mm)	2.43
Center Thickness CT (mm)	1.50
Center Thickness Tolerance (mm)	±0.1
Centering (arcminutes)	3 - 5
Surface Quality	40-20
Bevel	0.25mm x 45°
Substrate	N-SF11
Coating	NIR I, R_avg ≤0.5% @ 600 - 1050nm
Typical Energy Density Limit	7 J/cm² @ 1064nm, 10ns
RoHS	Exempt

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Double-Concave Lens, 6mm Dia. x -9mm FL, NIR-I Coated

#49-541

$36.00

Diameter (mm)	6.00
Diameter Tolerance (mm)	+0.0/-0.10
Clear Aperture CA (mm)	≥90% of Diameter
Effective Focal Length EFL (mm)	-9.00
Back Focal Length BFL (mm)	-9.32
Focal Length Tolerance (%)	±1
Radius R₁=-R₂ (mm)	-9.47
Edge Thickness ET (mm)	1.79
Center Thickness CT (mm)	1.00
Center Thickness Tolerance (mm)	±0.1
Centering (arcminutes)	3 - 5
Surface Quality	40-20
Bevel	0.25mm x 45°
Substrate	N-BK7
Coating	NIR I, R_avg ≤0.5% @ 600 - 1050nm
Typical Energy Density Limit	7 J/cm² @ 1064nm, 10ns
RoHS	Compliant

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Double-Concave Lens, 6mm Dia. x -12mm FL, NIR-I Coated

#49-542

$35.00

Diameter (mm)	6.00
Diameter Tolerance (mm)	+0.0/-0.10
Clear Aperture CA (mm)	≥90% of Diameter
Effective Focal Length EFL (mm)	-12.00
Back Focal Length BFL (mm)	-12.33
Focal Length Tolerance (%)	±1
Radius R₁=-R₂ (mm)	-12.57
Edge Thickness ET (mm)	1.59
Center Thickness CT (mm)	1.00
Center Thickness Tolerance (mm)	±0.1
Centering (arcminutes)	3 - 5
Surface Quality	40-20
Bevel	0.25mm x 45°
Substrate	N-BK7
Coating	NIR I, R_avg ≤0.5% @ 600 - 1050nm
Typical Energy Density Limit	7 J/cm² @ 1064nm, 10ns
RoHS	Compliant

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Double-Concave Lens, 9mm Dia. x -18mm FL, NIR-I Coated

#49-545

$35.00

Diameter (mm)	9.00
Diameter Tolerance (mm)	+0.0/-0.10
Clear Aperture CA (mm)	≥90% of Diameter
Effective Focal Length EFL (mm)	-18.00
Back Focal Length BFL (mm)	-12.33
Focal Length Tolerance (%)	±1
Radius R₁=-R₂ (mm)	-18.86
Edge Thickness ET (mm)	2.45
Center Thickness CT (mm)	1.50
Center Thickness Tolerance (mm)	±0.1
Centering (arcminutes)	3 - 5
Surface Quality	40-20
Bevel	0.25mm x 45°
Substrate	N-BK7
Coating	NIR I, R_avg ≤0.5% @ 600 - 1050nm
Typical Energy Density Limit	7 J/cm² @ 1064nm, 10ns
RoHS	Compliant

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NIR I Coated Double-Concave (DCV) Lenses

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