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
The Thorlabs ACL5040-DG15-A is a discontinued aspheric condenser lens with a diffuser, featuring a diameter of 50 mm, a focal length of 40 mm, a numerical aperture of 0.554, 1500 grit, and an antireflection coating for 350 nm to 700 nm. Originally released on February 7, 2012, and discontinued on July 13, 2015, this component has been officially replaced by the ACL5040U-DG15-A model. Submit your exact part number, quantity, and application requirements to request a quote for remaining availability.
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-DG15-A. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.