Adapter for extracting a portion of an image from an optical sys

Details Adapter for extracting a portion of an image from an optical sys Adapter for extracting a portion of an image from an optical sys

1996-11-21

1998-04-21

Nelms, David C.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359640, G02B 2714

Patent

active

057424349

ABSTRACT:
An adapter for an optical eyepiece for propagating a non-collimated light beam from an object along an optical axis of the eyepiece so as to present an image to an observer, the adapter comprising a beam splitter for inserting into the eyepiece so as to intercept the light beam and direct a portion thereof outside the eyepiece through an exit aperture of the beam splitter without substantially changing the image to the observer. The adapter is particularly useful for extracting a portion of an image from an eyepiece having restricted access in a night vision goggles thus permitting an external scene to be recorded simultaneous with its being viewed by the observer.

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