When using UNIBLITZ® shutters with coherent and noncoherent light sources (such as lasers or high power lamps used in microscopes) the power output from these sources may require the need to protect the Shutter’s blade surface from the source’s damaging effects. To accomplish this, all UNIBLITZ shutters are available with three optional blade finishes/coatings. The standard finish is black TEFLON® over a stainless steel substrate on both the input and output sides. As an alternate to the standard finish, a polished stainless steel ("S") finish is offered. Choices of AlSiO (“Z”) and AlMgF2 (“ZM”) coatings over a BeCu substrate are also available. It is intended that the user's light source be input to the reflective side only.* When considering a coated shutter blade (over a BeCu substrate) as an option, please keep in mind that the timing specifications will differ slightly from the published specifications found in the timing section of this data sheet. Typically add 10% (for the LS series) and 30% (for the VS series) to published timing specifications with shutters equipped with coated blades, excluding the VS35 and VS45. (Note timing is the same for all blade finishes and coatings for VS35 and VS45 type shutters.)  The user may also wish to review the Laser Application Reference Sheet located in the resource section.

The power density specification is not available for either the standard black TEFLON^® or the polished stainless steel shutter blades. Due to the thermal characteristics of the blade material, and its relationship to the shutter mechanism, the maximum blade surface temperature should not exceed 200 degrees C.

Figure #2

A reflectance vs. wavelength graph is shown in figure #2 above. All blade coatings are reflective on the input side only. Be advised the reflective surface is intended for direct exposure to the user's laser or light source. The opposing side is finished with black TEFLON^®.

*When switching a high powered coherent or non-coherent light source with a shutter equipped with the proper coated blades for the particular application, input to the black TEFLON^® side will most likely cause irreparable damage to the shutter's blades.  This damage is not covered under our limited warranty. All listed power ratings are for input to the reflective side only.

Ultraviolet
.3-.4um
(microns)