NEW Thorlabs LF1988-A Ø1" N-BK7 Negative Meniscus Lens f= -500 mm, 350-700 nm Ar

NEW Thorlabs LF1988-A Ø1

$19.19 Buy It Now or Best Offer
free,30-Day Returns

Seller Store testeqe
(10255) 97.6%,

Location: Phoenix, Arizona
Ships to: US,
Item: 166584289678

All returns accepted:ReturnsNotAccepted
Thorlabs:Thorlabs
Type:Lens
LF1988-A:LF1988-A
MPN:LF1988-A

NEW Thorlabs LF1988-A Ø1″ N-BK7 Negative Meniscus Lens f= -500 mm, 350-700 nm Arc Comes with what you see in the pictures. If you don’t see it, you probably won’t get it. Specifications are from Thorlabs and may vary slightly due to upgrades, options, or revisions this unit may or may not have. This lens is new, old stock. Benefits: Decrease the NA of Lens Systems Frequently Used for Beam Expanding Applications Minimizes the Increase in Spherical Abberations for Multi-Element Systems Features: Ø Negative Meniscus Lenses Fabricated from N-BK7 Glass AR Coating for 350 – 700 nm Focal Length of -500 mm Spherical Surface Power: 3 Fringes Spherical Surface Irregularity: λ/4 Description: These Negative Meniscus Lenses are fabricated from RoHS-compliant BK7 glass (N-BK7) and are available uncoated or with one of our three broadband antireflection coatings: -A (350-700 nm) – the item has this coating, -B (650-1050 nm), or -C (1050-1700 nm). These coatings greatly reduce the 4% loss per surface incurred when using an uncoated lens. Negative meniscus (convex-concave) lenses, are designed to minimize spherical aberration in optical systems. When used in combination with another lens, a negative meniscus lens will increase the focal length and decrease the numerical aperture (NA) of the system. When used to diverge light, as shown in the diagram above, the convex surface should face the beam to minimize spherical aberration. N-BK7 is the most common optical glass used for high quality optical components. It 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. If your application would benefit from a UV fused silica substrate, please visit our page for UV Fused Silica Negative Meniscus Lenses. We also offer zinc selenide and calcium fluoride negative meniscus lenses. Specifications: Lens Shape: Negative Meniscus Substrate Material: N-BK7 Wavelength Range: 350 – 700 nm Diameter: 1″ (25.4 mm) Diameter Tolerance: +0.00/-0.10 mm Clear Aperture: > 90% of Diameter Thickenss Tolerance: ±0.1 mm Focal Length Tolerance: ±1% Design Wavelength: 587.6 nm Index of Refraction: 1.515 @ 633 nm Surface Quality: 40-20 Scratch-Dig Centration: < 3 arcmin Damage Thresholdse: 7.5 J/cm2 (532 nm, 10 ns, 10 Hz, Ø0.504 mm) Focal Length: -500 mm Diopterb: -2.0 Radius of Curvature 1: 250.0 mm Radius of Curvature 2: 126.3 mm Center Thickness: 3.0 mm Edge Thicknessc: 3.3 mm Back Focal Lengthd: -496.3 mm Notes: a: Suggest Fixed Lens Mount: LMR1 b: Reciprocal of the Focal Length in Meters c: Edge Thickness Given Before 0.2 mm at 45° Typical Chamfer d: Measured at the Design Wavelength, 587.6 mm e: Limited by the Antireflection Coating For Domestic Customers: Packaging, handling, and order processing included in shipping in all domestic shipments as quoted by the shipping calculator. For International Customers there is a $0.00 minimum for packaging, handling, and order processing. International shipping to be determined by destination. Prior to shipment I will need to know the following information (filled out on a form that I will send you) for International Customers or Packages/Freight being Forwarded internationally. International customers may also be subject to a freight forwarder form if applicable.: (1) Are you the end-user of this item? (2) If you are not the ultimate end-user of the item, please state the ultimate end user's name. (3) What is the ultimate country destination? 01/30/17

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