Hermetically sealed disk cartridge with adjustable optical window

Claim 1

An information recording disk cartridge for protectively housing an information storage and retrieval disk in an optical information storage and retrieval device of a type having a disk rotating on a device spindle, said cartridge comprised of: a cartridge casing for protectively housing said disk; a light transmissive window; means for sealably and adjustably attaching said light transmissive window in a first opening in said casing, said first opening located on an upper surface of said casing, said means comprising: a window frame having an outer circumference securely bonded to said first opening in said casing, and having at least three threaded holes through an inner diameter for passage of threaded adjusting screws; a flexure mount having an interior circumference sealably bonded around said window and an outer circumference sealably bonded to a rim on said window frame, said flexure mount therefor able to flex upward and downward; and at least three threaded adjusting screws having a length sufficient to pass through said window frame threaded holes and contact an upper inner surface of said flexure mount, such that said screws can be individually adjusted so as to place said window co-planar with respect to said disk disposed in said cartridge casing; and means for transmitting device spindle rotation to said disk disposed in said cartridge casing.