This auction is for a Coherent Laser 532nm mirror or blocking filter, part#4840-003-PV .  It is 1/2" diameter by 1/16" thick. It is also marked as Alcon part# 542-1203-001.  This is a very special mirror, as it has extremely high reflectance at normal incidence.  Unlike most dielectric mirrors, this one has no visible transmission of a 5mw 532 pointer.  It may also be used as a very high discrimination filter for filtering out 532nm, as it has very high visible throughput otherwise. The blocking band looks like 510-550 nm.  I suspect that it was originally designed to filter out 532nm, as each one is individually marked with an "OD" number of around 6.3, or transmission of 10 (-6) at 532nm.

It would also make a very nice scanner mirror for your 532nm scanning system, as it is nice and light weight, being only 1/16" thick.

This optic is brand new in the original container.  As you probably know, Coherent manufactures some of the best quality laser optics around, and you won't be disappointed with this optic.

Be sure to visit my Ebay store, Cheap-Optics, for lots more great deals on mirrors, optics, Newport stuff, and other optical mounts.  Use the easy-to-use categories and searches on the left side of the store to find just the optics you need.

Shipping is $5.50 for USPS Priority within the cont US.  International cost is $24.00 for USPS Priority International.

Payment by Paypal is preferred, but also cashier's check or money order.