UNCOATED BK7 PLANO-CONCAVE LENSES

SCHOTT’s N-BK7
This Borosilicate Crown Glass is a widely recognized lead and arsenic-free variant. Excellent optical quality with high homogeneity in refractive index, uniform transmission, and very low inclusion and bubble content. Refractive Index (nd) approx. 1.517 (at 587.6 nm). This is considered a relatively low refractive index for optical glasses.

If the lens is plano-concave, a collimated beam of light passing through the lens is diverged (spread); the plano-concave lens is thus called a negative or diverging lens. The beam after passing through the lens appears to be emanating from a particular point on the axis in front of the lens; the distance from this point to the lens is also known as the focal length, although it is negative with respect to the focal length of a converging lens.

DIA12.7xT6mm BK7 Plano-Concave Substrate (R-50mm)

P/N: POL-BK7-PCV-U-01270600-R50

General Specifications

Material: BK7 optical glass ;
Wavelength Range: 350 – 2000nmm ;
Design Wavelength: 633nm (n=1.515082), plano-concave
Outer Diameter: 12.7,+0.0/-0.1mm
Edge Thickness: Te=6.0,-0/+0.3mm
Radius of Converture(ROC): -50mm (concave surface) (tolerance within 0.5%)
Focal Focal Length(EFL): EFL (transmission) per calculation only; Reflective focal length: R/2 = -25mm
Surface Quality: Both surface optically polished, per 20/10 scratch and dig
Centration: < 3 arc minutes
Coating: Uncoated on both surfaces

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DIA12.7xTe2.4mm BK7 Plano-Concave Lens f-100mm

P/N: POL-BK7-PCV-U-12.7-F100

General Specifications

Material: BK7 optical glass ;
Wavelength Range: 350 – 2000nmm ;
Design Wavelength: 633nm (n=1.515082), plano-concave
Outer Diameter: 12.7,+0.0/-0.1mm
Edge Thickness: Te=2.40,+/-005mm
Radius of Converture(ROC): NA
Focal Focal Length(EFL): -100mm (+/-1%)
Surface Quality: 40/20 scratch and dig
Centration: < 3 arc minutes
Coating: Uncoated on both surfaces

Pricing Overview (Excl. Taxes and Fees)

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DIA12.7xTe1.7mm BK7 Plano-Concave Lens f-150mm

P/N: POL-BK7-PCV-U-12.7-F150

General Specifications

Material: BK7 optical glass ;
Wavelength Range: 350 – 2000nmm ;
Design Wavelength: 633nm (n=1.515082), plano-concave
Outer Diameter: 12.7,+0.0/-0.1mm
Edge Thickness: Te=1.70,-0.05/+0mm
Radius of Converture(ROC): NA
Focal Focal Length(EFL): -150mm (+/-1%)
Surface Quality: 40/20 scratch and dig
Centration: < 3 arc minutes
Coating: Uncoated on both surfaces

Pricing Overview (Excl. Taxes and Fees)

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DIA12.7xT6mm BK7 Plano-Concave Substrate (R-100mm)

P/N: POL-BK7-PCV-U-01270600-R100

General Specifications

Material: BK7 optical glass ;
Wavelength Range: 350 – 2000nmm ;
Design Wavelength: 633nm (n=1.515082), plano-concave
Outer Diameter: 12.7,+0.0/-0.1mm
Edge Thickness: Te=6.0,-0/+0.3mm
Radius of Converture(ROC): -100mm(concave surface) (tolerance within 0.5%)
Focal Focal Length(EFL): EFL (transmission) per calculation only; Reflective focal length: R/2 = -50mm
Surface Quality: Both surface optically polished, per 20/10 scratch and dig
Centration: < 3 arc minutes
Coating: Uncoated on both surfaces

Pricing Overview (Excl. Taxes and Fees)

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DIA12.7xTe4.2mm BK7 Plano-Concave Lens (R-250mm)

P/N: POL-BK7-PCV-U-12.7-R250

General Specifications

Material: BK7 optical glass ;
Wavelength Range: 350 – 2000nmm ;
Design Wavelength: 633nm (n=1.515082), plano-concave
Outer Diameter: 12.7,+0.0/-0.1mm
Edge Thickness: Te=4.20+/-0.05mm
Radius of Converture(ROC): NA
Focal Focal Length(EFL): -250mm (+/-1%) processed
Surface Quality: 40/20 scratch and dig
Centration: < 3 arc minutes
Coating: Uncoated on both surfaces

Pricing Overview (Excl. Taxes and Fees)

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