TECHSPEC® Steinheil Triplet Achromats

Specifically designed for 1:1 conjugate ratios, Steinheil triplets are ideal for use in relay systems. Utilizing symmetry to correct for aberrations, Steinheils are made from a low index center element cemented between two identical high index outer elements. In addition, each lens is edged down to f-numbers with reasonable aberration correction at increased fields. Decreased diameters allow lens mounting in a smaller space than traditional Steinheil designs permit. BaSF1; nd = 1.626. AR Coated, 1/4 wave MgF2 at 550nm. All dimensions are in mm.

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Description Stock No. Price In Stock  
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6.25mm Dia X 12.5mm EFL Steinheil Triplet Achromat Lens
NT47-673 $79.00 Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 6.25
Effective Focal Length EFL (mm) 12.50
Back Focal Length BFL (mm) 8.94
Center Thickness CT (mm) 9.00
Center Thickness A (mm) 5.00
Center Thickness B (mm) 2.00
Edge Thickness ET (mm) 7.70
Radius R1 (mm) 7.81
Radius R2 (mm) 4.09
Radius R3 (mm) -4.09
Radius R4 (mm) -7.81
Substrate A N-BK7
Substrate B N-BASF64
Surface Quality 40-20
Coating AR Coated 1/4wave MgF2
Diameter Tolerance (mm) +0.0/-0.1
Focal Length Tolerance (%) 1
Center Thickness Tolerance (mm) ±0.3
Centering (arcminutes) 3
Bevel 0.25mm x 45°
RoHS Compliant
9mm Dia x 18mm EFL Steinheil Triplet Achromat Lens
NT45-399 $65.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 9.00
Effective Focal Length EFL (mm) 18.00
Back Focal Length BFL (mm) 12.93
Center Thickness CT (mm) 12.96
Center Thickness A (mm) 7.20
Center Thickness B (mm) 2.88
Edge Thickness ET (mm) 11.28
Radius R1 (mm) 12.45
Radius R2 (mm) 5.89
Radius R3 (mm) -5.89
Radius R4 (mm) -12.45
Substrate A N-BK7
Substrate B BASF1
Surface Quality 40-20
Coating AR Coated 1/4wave MgF2
Diameter Tolerance (mm) +0.0/-0.1
Focal Length Tolerance (%) 1
Center Thickness Tolerance (mm) ±0.3
Centering (arcminutes) 3
Bevel 0.25mm x 45°
RoHS Exempt
12.5mm X 25mm EFL Steinheil Triplet Achromat Lens
NT47-675 $65.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.50
Effective Focal Length EFL (mm) 25.00
Back Focal Length BFL (mm) 17.82
Center Thickness CT (mm) 18.00
Center Thickness A (mm) 10.00
Center Thickness B (mm) 4.00
Edge Thickness ET (mm) 15.39
Radius R1 (mm) 15.65
Radius R2 (mm) 8.22
Radius R3 (mm) -8.22
Radius R4 (mm) -15.65
Substrate A N-BK7
Substrate B N-BASF64
Surface Quality 40-20
Coating AR Coated 1/4wave MgF2
Diameter Tolerance (mm) +0.0/-0.1
Focal Length Tolerance (%) 1
Center Thickness Tolerance (mm) ±0.3
Centering (arcminutes) 3
Bevel 0.25mm x 45°
RoHS Compliant

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