TECHSPEC® Uncoated Double-Concave (DCV) Lenses

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 with a variety of Anti-Reflection coating options: MgF2, VIS 0°, VIS NIR, NIR I and NIR II.

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Description Stock No. Price In Stock  
Showing 1-13 of 13 Items | Sort by Spec
Double-Concave Lens, 6mm Dia. x -6mm FL, Uncoated
NT32-986 $21.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
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 Uncoated
RoHS Compliant
Double-Concave Lens, 6mm Dia. x -9mm FL, Uncoated
NT48-932 $21.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
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 Uncoated
RoHS Exempt
Double-Concave Lens, 6mm Dia. x -12mm FL, Uncoated
NT48-681 $21.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
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 Uncoated
RoHS Exempt
Double-Concave Lens, 9mm Dia. x -9mm FL, Uncoated
NT48-336 $21.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
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 Uncoated
RoHS Exempt
Double-Concave Lens, 9mm Dia. x -12mm FL, Uncoated
NT48-933 $21.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
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 Uncoated
RoHS Compliant
Double-Concave Lens, 9mm Dia. x -18mm FL, Uncoated
NT48-682 $21.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
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) -18.49
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 Uncoated
RoHS Exempt
Double-Concave Lens, 12mm Dia. x -12mm FL, Uncoated
NT32-988 $23.50Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.00
Diameter Tolerance (mm) +0.0/-0.10
Clear Aperture CA (mm) 11.00
Effective Focal Length EFL (mm) -12.00
Back Focal Length BFL (mm) -12.81
Focal Length Tolerance (%) ±1
Radius R1=-R2 (mm) -19.47
Edge Thickness ET (mm) 4.71
Center Thickness CT (mm) 3.00
Center Thickness Tolerance (mm) ±0.1
Centering (arcminutes) 3 - 5
Surface Quality 40-20
Bevel 0.25mm x 45°
Substrate N-SF11
Coating Uncoated
RoHS Compliant
Double-Concave Lens, 12mm Dia. x -18mm FL, Uncoated
NT48-934 $23.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.00
Diameter Tolerance (mm) +0.0/-0.10
Clear Aperture CA (mm) 11.00
Effective Focal Length EFL (mm) -18.00
Back Focal Length BFL (mm) -18.65
Focal Length Tolerance (%) ±1
Radius R1=-R2 (mm) -18.94
Edge Thickness ET (mm) 3.76
Center Thickness CT (mm) 2.00
Center Thickness Tolerance (mm) ±0.1
Centering (arcminutes) 3 - 5
Surface Quality 40-20
Bevel 0.25mm x 45°
Substrate N-BK7
Coating Uncoated
RoHS Exempt
Double-Concave Lens, 12mm Dia. x -24mm FL, Uncoated
NT48-683 $23.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.00
Diameter Tolerance (mm) +0.0/-0.10
Clear Aperture CA (mm) 11.00
Effective Focal Length EFL (mm) -24.00
Back Focal Length BFL (mm) -24.65
Focal Length Tolerance (%) ±1
Radius R1=-R2 (mm) -25.14
Edge Thickness ET (mm) 3.31
Center Thickness CT (mm) 2.00
Center Thickness Tolerance (mm) ±0.1
Centering (arcminutes) 3 - 5
Surface Quality 40-20
Bevel 0.25mm x 45°
Substrate N-BK7
Coating Uncoated
RoHS Exempt
Double-Concave Lens, 20mm Dia. x -20mm FL, Uncoated
NT32-990 $25.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 20.00
Diameter Tolerance (mm) +0.0/-0.10
Clear Aperture CA (mm) 19.00
Effective Focal Length EFL (mm) -20.00
Back Focal Length BFL (mm) -20.55
Focal Length Tolerance (%) ±1
Radius R1=-R2 (mm) -31.82
Edge Thickness ET (mm) 5.03
Center Thickness CT (mm) 2.00
Center Thickness Tolerance (mm) ±0.1
Centering (arcminutes) 3 - 5
Surface Quality 40-20
Bevel 0.25mm x 45°
Substrate N-SF11
Coating Uncoated
RoHS Compliant
Double-Concave Lens, 25mm Dia. x -25mm FL, Uncoated
NT32-992 $25.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.00
Diameter Tolerance (mm) +0.0/-0.10
Clear Aperture CA (mm) 24.00
Effective Focal Length EFL (mm) -25.00
Back Focal Length BFL (mm) -25.69
Focal Length Tolerance (%) ±1
Radius R1=-R2 (mm) -39.78
Edge Thickness ET (mm) 6.33
Center Thickness CT (mm) 2.50
Center Thickness Tolerance (mm) ±0.1
Centering (arcminutes) 3 - 5
Surface Quality 40-20
Bevel 0.25mm x 45°
Substrate N-SF11
Coating Uncoated
RoHS Compliant
Double-Concave Lens, 25mm Dia. x -50mm FL, Uncoated
NT32-996 $25.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.00
Diameter Tolerance (mm) +0.0/-0.10
Clear Aperture CA (mm) 24.00
Effective Focal Length EFL (mm) -50.00
Back Focal Length BFL (mm) -50.82
Focal Length Tolerance (%) ±1
Radius R1=-R2 (mm) -52.10
Edge Thickness ET (mm) 5.40
Center Thickness CT (mm) 2.50
Center Thickness Tolerance (mm) ±0.1
Centering (arcminutes) 3 - 5
Surface Quality 40-20
Bevel 0.25mm x 45°
Substrate N-BK7
Coating Uncoated
RoHS Compliant
Double-Concave Lens, 25mm Dia. x -100mm FL, Uncoated
NT32-994 $25.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.00
Diameter Tolerance (mm) +0.0/-0.10
Clear Aperture CA (mm) 24.00
Effective Focal Length EFL (mm) -100.00
Back Focal Length BFL (mm) -101.64
Focal Length Tolerance (%) ±1
Radius R1=-R2 (mm) -104.20
Edge Thickness ET (mm) 6.43
Center Thickness CT (mm) 5.00
Center Thickness Tolerance (mm) ±0.1
Centering (arcminutes) 3 - 5
Surface Quality 40-20
Bevel 0.25mm x 45°
Substrate N-BK7
Coating Uncoated
RoHS Compliant
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