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OPTICS / LENSES / Spherical Bi-Concave Lenses / DIA25.4mm BK7 Bi-Concave Lenses DAR@400-700nm
BK7 (or N-BK7, a lead-free version) is a very common type of borosilicate crown glass. It’s a popular choice for commercial optics due to its Excellent optical properties, Broad transmission range, Good physical properties: It is relatively hard and resistant to scratches, and it’s chemically stable.
V-Coats vs. Broadband AR:
A V-coat is an AR coating optimized for a very narrow wavelength range, typically a specific laser line (e.g., 1064 nm for a Nd:YAG laser). The plot of reflectance versus wavelength is V-shaped, with the minimum at the design wavelength. In contrast, a broadband AR (BBAR) coating is a multi-layer design that reduces reflections over a wider range of wavelengths within the visible light spectrum.
BK7 Optical Glass Lenses, Bi-Concave Design; Diameter 1-inch, AR Coated at 400-700nm
POL-BK7-BCV-A-25.4 SERIES
DIA25.4mm BK7 Bi-Concave Lens f-25mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-25
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -25.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$90.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-35mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-35
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -35.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$85.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-50mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-50
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -50.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-75mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-75
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -75.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-100mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-100
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -100.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-125mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-125
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -125.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-150mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-150
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -150.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-175mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-175
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -175.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-200mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-200
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -200.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-250mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-250
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -250.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-300mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-300
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -300.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-400mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-400
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -400.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-500mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-500
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -500.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-750mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-750
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -750.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)
DIA25.4mm BK7 Bi-Concave Lens f-1000mm (400-750nm)
P/N: POL-BK7-BCV-A-25.4-1000
General Specifications
- Substrate Material: BK7 optical glass;
Wavelength Range: 350nm-2.0um;
Design Wavelength: 633nm (n=1.515082), Bi-concave configuration - Outer Diameter: 25.4,+0.0/-0.1mm
- Effective Focal Length(EFL): -1000.0mm (+/-1%)
- Surface Quality: 40/20 scratch and dig
- Centration: < / = 3 arc minutes
- Coating (full dielectric): AR coated @ 400-750nm, R<0.5% max double-surface
Pricing Overview (Excl. Taxes and Fees)
- Purchase Qty < 20pcs: S$80.00/pc
- Purchase Qty 20pcs or more: S$70.00/pc
- Purchase Qty 100pcs or more:
Inquire to us for volume pricing
Stock Availability
- Local Singapore Warehouse: 9pcs
- New Batch Process Leadtime: Approx. 3-4weeks; EXW-SIN (T&C Apply)