Description: Check out my other items(NEW) Thorlabs LA-1289-B 12.7 mm (1/2") Lens Focal Length: 30.0 mm (~1.2")N-BK7 Plano-Convex Lens Anti-refection Coating: 650-1050 nm Nominal Focal Length at 589 nm: 30 mmDiameter: 12.7 mm or 0.5 inchesFor Visible and/or Near Infrared Applications$4.00 Standard Shipping for any quantity of lenses purchased for US OrdersGeneral Thorlabs FeaturesMaterial: N-BK7 Wavelength Range: 350 - 2000 nm (Uncoated) Anti-reflection coated for optimal transmission from 650-1050 nm. Well Suited for Many Finite Imaging Applications Offers Excellent Transmittance Throughout the Visible and Near InfraredThese Plano-Convex Lenses are fabricated from RoHS-compliant N-BK7 glass and feature an antireflection coating for the 650 nm to 1050 nm range. N-BK7 is typically chosen whenever the additional benefits of UV fused silica (i.e., good transmission further into the UV and a lower coefficient of thermal expansion) are not necessary. These lenses have a positive focal length and near-best-form shape for infinite and finite conjugate applications.Plano-convex lenses can focus a collimated beam or collimate light from a point source. To minimize the introduction of spherical aberration, a collimated light source should be incident on the curved surface of the lens when being focused and a point light source should be incident on the planar surface when being collimated. Common SpecificationsDiameters2 mm and 3 mm6 mm, 9 mm, 1/2", 18 mm, 25 mm, 1", 30 mm, 1.5", 2", and 75 mmLens ShapePlano-ConvexSubstrate MaterialN-BK7 (Grade A)aAR Coating Range650 - 1050 nm (-B Coating)Reflectanceb over Coating Range (Avg.) @ 0° AOI<0.5%Design Wavelength587.6 nmcIndex of Refraction1.515dSurface Flatness (Plano Side)λ/2dSpherical Surface Powere (Convex Side)3λ/2dSurface Irregularity (Peak to Valley)λ/4dSurface Quality60-40 Scratch-Dig40-20 Scratch-DigThickness Tolerance±0.03 mm±0.1 mmDiameter Tolerance+0.00 / -0.02 mm+0.0 / -0.1 mmCentration≤5 arcmin<3 arcminDamage Thresholdf7.5 J/cm2 (810 nm, 10 ns, 10 Hz, Ø0.144 mm)Abbe Numbervd = 64.17Clear Aperture>90% of DiametergFocal Length Tolerance±1%
Price: 18 USD
Location: Chicago, Illinois
End Time: 2025-01-12T00:40:47.000Z
Shipping Cost: 5 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Thorlabs
Type: Biconvex Lens
Model: LA1289-B
MPN: LA1289-B
Country/Region of Manufacture: United States
