TIR critical angle re-adjustent

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Dear All,

Yesterday I have tested our new 585 nm laser in conjuction with 514 nm argon
and 437 nm diode under TIR conditions.

Even though I have not noticed the need for the critical angle re-adjustment
between 437 nm and 514 nm lines (77 nm difference), however, when the
critical angle was set for the yellow laser (585 nm), switching from 585 nm
to 514 nm line  (71 nm difference) required the (manual) resetting of the
critical angle.
I used the 89006 triple beamsplitter (A/R coated), which seemed to reflect
the 514 argon line (up to 70%).

I am looking for help with the device that would allow quick, low msec
range, critical angle re-adjustment or any other suggestions will be
appreciated.

Thanks a lot in advance,

Vitaly

Vitaly P. Boyko,
NCI-Frederick,
301-846-6575