A SLIT MECHANISM AND AN OPTICAL DEVICE COMPRISING A SLIT MECHANISM

摘要

The invention provides a slit mechanism for an optical device, the slit mechanism comprising: one or more slits comprising a first slit defined by first and second slit jaws; a first displaceable portion configured for commanded displacement in an optical device, wherein forward and reverse displacements of the first displaceable portion respectively open and close the first slit jaw; a second displaceable portion, wherein forward and reverse displacements of the second displaceable portion respectively close and open the second slit jaw; a rotatable portion coupled to the first and second displaceable portions, wherein forward and reverse displacements of the first displaceable portion are translated via a rotation of the rotatable portion to respectively produce reverse and forward displacements of the second displaceable portion; and at least one stabilising flexure coupling the rotatable portion to an immobile anchor point; wherein the at least one stabilising flexure constrains movement of the rotatable portion to the rotation for translating the displacements.