US PATENT SUBCLASS 359 / 503
EXTENDED SPACING STRUCTURE FOR OPTICAL ELEMENTS

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

503EXTENDED SPACING STRUCTURE FOR OPTICAL ELEMENTS {3}
504  DF  .~> Wide angle (e.g., door peep)
505  DF  .~> With screen or reticle in real image plane
506  DF  .~> Extension of tubular element adjustable

DEFINITION

Classification: 359/503

EXTENDED SPACING STRUCTURE FOR OPTICAL ELEMENTS:

(under the class definition) Subject matter including (a) means for maintaining different types of optical elements significantly separated in a fixed or adjustable relationship along the optical axis or (b) means for maintaining lenses significantly separated as in a Galilean telescope or door peep.

SEE OR SEARCH THIS CLASS, SUBCLASS:

744, for afocal lenses (e.g., Galilean telescopes).

894+, for optical apertures or tubes or transparent closures.

896, for miscellaneous optical devices.