Patent ID: 6631040
Filing Date: 2003-10-07
Classification: G02B

Abstract:
An apparatus, comprising:first and second parts capable of relative movement parallel to a first direction, said first part including a section having thereon a coupling structure which faces in a second direction approximately transverse to said first direction; an optical component which is part of an optical system and which is supported on one of said first and second parts; and a compensation part operatively coupled to said second part and including a section having thereon a coupling structure which faces and operatively engages said coupling structure on said first part, said compensation part having a coefficient of thermal expansion which causes said compensation part to respond to a temperature change by undergoing a size change that effects relative movement of said first and second parts parallel to said first direction by an amount which compensates for a variation in optical characteristics of the optical system caused by the temperature change; a first of said sections having thereon a first of said coupling structures and a second of said sections having thereon a second of said coupling structures, said first section being resilient, and being flexed so as to continuously resiliently urge said first coupling structure against said second coupling structure in a direction approximately parallel to said second direction.