Beam Expander Agilent & Keysight Short-Tube 5517 & 5519A/B Lasers ~4X, ~8X, ~12X

$39.95 Buy It Now or Best Offer
free,30-Day Returns

Seller Store siliconsam
(2852) 100.0%,

Location: Bala Cynwyd, Pennsylvania
Ships to: US,
Item: 305198314801

Restocking Fee:No
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
MPN:Does Not Apply
Country/Region of Manufacture:United States

These are 3 mm. 6 mm. and 9 mm beam expanders for/from Agilent or Keysight 5517 and 5519A/B lasers using the so-called “Short tube”. This includes most of those going back to around 2012 and some ever earlier. These are NOT the same as what are in the other listings for HP beam expanders. The 6 mm beam expanders look similar from the front and side. The only way to tell the difference is by carefully inspecting the lenses inside the rear-end. The 6 mm Short tube beam expanders have a highly curved concave lens, the others are slightly convex or planar. For the 3 mm and 9 mm its more difficult. The normal size 3 mm and 9 mm beam expanders are not enabled in this listing as I have a very small number of those, but inquire if interested. The Short tube has a plastic cover at its rear-end while the older Long tubes have rubbery potting compound with a glass nib sticking out the back. These have a very approximate expansion factor of 8X for the 6 mm version, 4X for the 3 mm version, and 12X for the 9 mm version. The beam diameter is limited by an aperture disk at the output but that can be popped off to enable a final beam diameter at least 50 percent larger dependent upon the input beam diameter. It’s just 30 seconds of work on a drill press. See last photo for 6 mm modified beam expander. I can do this upon request. But the most common application of these is to replace an existing beam expander in which case this is irrelevant. While the collimation / focus is sealed with adhesive, the front barrel can be freed with some heat and persuasion. This only affects the parallelism of the beam, NOT the beam diameter at the output of the beam expander. Sorry, no returns if there is any evidence that adjustment was attempted. For example, gouge marks from a pair of Vice Grips™. Or if the front bezel has been mangled. ;( 😉 I am not sure I am interested in performing this modification, but contact me with an offer if interested. 😉 And instructions are available. Very good cosmetic condition, optically perfect, tested and guaranteed. Note: These beam expanders will NOT work correctly with Keysight or Agilent Short tube Z4203/N1211A lasers. I have beam expanders for most of the older Hewlett Packard (HP) 5501B, 5517, 5518A, and 5519A/B lasers.They will also not work correctly with ANY “Long” tube Agilent lasers, though other sellers have beam expanders for those. Thanks for looking, — sam

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