It's a reference to the type of door shown here.
Student or Learner
Could anyone help me with the term "irised open" in the following sentence?
Thank you very much.
We made it to the ship in about five minutes; there was a minute or two of docking negotiations as a shuttle bay door irised open, accepted the shuttle, and closed again.
I check out the dictionary and only know that irised is something about rainbow, so I really can't figure out what it means in the aforementioned context.
I've never met 'iris' used as a verb, but it may well be used with reference to this sort of door, which - to a limited extent - mimics the dilation of the pupils (which could be seen as a shrinking of the band of iris visible around the pupil). A clearer example is a camera's aperture http://www.digitalphotographybasics....0/aperture.gif (where there are more 'petals', so that the opening is more nearly circular).'