BK7 Double Convex Lens

Description

BK7 double-convex lenses (DCX) are versatile optical components renowned for their excellent transmittance across a broad spectrum ranging from 350nm to 2000nm. These lenses are primarily utilized in finite imaging applications where precise focusing and clarity are essential. Crafted from BK7 glass, these lenses offer superior optical performance without the need for UV-grade fused silica, making them a cost-effective solution for various optical systems.

Specifications

Lens Type:	Bi-Convex
Material:	BK7, UVFS, CaF2, ZnSe, H-K9L
Diameter:	2 mm
Focal Length:	2.5 mm
Edge Thickness, Te:	1 mm
Material:	BK7
Design Wavelength:	587.6nm
Diameter Tolerance:	+0.0/-0.1mm
Center Thickness Tolerance:	±0.2mm
Surface Figure:	λ/4 @633nm
Focal Length Tolerance:	±1%
Centration:	3 arc min.
Surface Quality:	40/20-60/40
Bevel:	0.1mm-0.3mmx45°
Coating:	Uncoated or Customized AR

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Features

Broad Spectral Transmittance: BK7 double-convex lenses exhibit exceptional transmittance from 350nm to 2000nm, ensuring clear imaging across a wide range of wavelengths.
Finite Imaging Applications: Ideal for applications requiring finite imaging, such as magnification, projection, and focusing systems, where precise optical performance is crucial.
Optical Precision: Engineered with high precision, these lenses maintain tight tolerances for diameter, center thickness, surface figure, and focal length, ensuring consistent and reliable performance.
Versatile Sizing Options: Available in various diameters and focal lengths, offering flexibility to meet diverse application requirements.
Durable Construction: Constructed from BK7 glass, these lenses are robust and durable, capable of withstanding demanding optical environments.
Customization Available: Tailored options including diameter, focal length, center thickness, and coating specifications are available to accommodate specific application needs.
Coating Options: Offered with a choice of uncoated or customized anti-reflective (AR) coatings to enhance optical performance and minimize unwanted reflections.

Summary:

Material: BK7 Optical Glass
Design Wavelength: 587.6nm
Diameter Tolerance: +0.0/-0.1mm
Center Thickness Tolerance: ±0.2mm
Surface Figure: λ/4 @633nm
Focal Length Tolerance: ±1%
Centration: 3 arc min.
Surface Quality: 40/20-60/40
Bevel: 0.1mm-0.3mmx45°
Coating: Uncoated or Customized AR

Applications

Finite Imaging Applications: BK7 double-convex lenses are ideal for finite imaging applications due to their excellent transmittance from 350nm to 2000nm.
Optical Systems: Used in various optical systems where the advantages of UV grade fused silica are not required, providing a cost-effective solution with BK7 glass.
Scientific Instruments: Suitable for use in scientific instruments that require precise imaging capabilities.
Laser Applications: Can be used in laser applications where a specific design wavelength of 587.6nm is advantageous.
Custom Optical Solutions: Available with uncoated or customized anti-reflective (AR) coatings to fit specific needs, making them versatile for custom optical solutions.
Alternative Substrate Options: Besides N-BK7, lenses can be made from CaF2, Fused Silica, and ZnSe substrates, offering flexibility in material choice for different applications.