LB7639-F

Name: Thorlabs LB7639-F — Ø1/2" ZnSe Bi-Convex Lens, f = 20.0 mm, AR-Coated: 8-12 µm
Brand: Thorlabs

Thorlabs LB7639-F — Ø1/2" ZnSe Bi-Convex Lens, f = 20.0 mm, AR-Coated: 8-12 µm

The Thorlabs LB7639-F is a discontinued Ø1/2" Zinc Selenide (ZnSe) bi-convex lens featuring a 20.0 mm focal length and an 8 to 12 µm anti-reflective coating, originally released on November 10, 2009. This component has been officially superseded by the LB7639-E3 model. Submit the exact part number, quantity, and application requirements to request a quote for remaining inventory or the approved replacement.

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Why no listed price?

Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Thorlabs references — within one business day.

Manufacturer: Thorlabs
Part number: LB7639-F
Product series: Ø1/2" ZnSe Bi-Convex Lens, f = 20.0 mm, AR-Coated: 8-12 µm
Data verification: Manufacturer evidence reviewed

For a faster response, include quantity, condition, and delivery destination.

Exact part-number verificationTechnical properties are matched to LB7639-F.

Worldwide sourcingSupport for planned and urgent industrial requirements.

Manufacturer documentationA document is added when the reviewed source provides one.

Verified configuration

Technical Specifications

Product Name: Ø1/2" ZnSe Bi-Convex Lens, f = 20.0 mm, AR-Coated: 8-12 µm
Lifecycle Status: Discontinued
This item has been replaced by LB7639-E3 .: View its last web presentation.
Last Web Presentation Open: Release Date November 10, 2009
Last Web Presentation: Open
Release Date: November 10, 2009
Official Replacement Model: LB7639-E3

Engineering context

Identification and RFQ Guidance

Confirm the exact configuration

Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

What to include in your RFQ

Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.

Technical verification

Our sourcing response is prepared against Thorlabs LB7639-F. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.