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
Manufactured by Thorlabs, the ACL5040-DG6-B is a Ø50 mm aspheric condenser lens featuring an f=40 mm focal length, a numerical aperture of 0.554, 600 grit diffuser, and a 650 nm to 1050 nm antireflection coating. Released on February 7, 2012, this discontinued component was officially replaced by the ACL5040U-DG6-B on July 13, 2015. Submit your exact part number, quantity, and application requirements to request a quote.
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.
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 ACL5040-DG6-B. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.