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.

Thorlabs
Thorlabs offers the unmounted, uncoated aspheric lens with a focal length of 2.8 mm, a design wavelength of 980 nm, and a package weight of 0.04 lbs each. This optical component features a numerical aperture of 0.26/0.52 and a working distance of 2.0/7.1 mm, with its lifecycle status available in current manufacturer documentation following its November 25, 2020 release date. Submit the exact part number 355440, quantity, and application requirements for a quote.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
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.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Thorlabs 355440. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.