Education and demonstration – Means for demonstrating apparatus – product – or surface... – Household equipment
Patent
1989-12-06
1991-02-19
Bentley, Stephen C.
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Household equipment
350502, 434 20, G02B 2302
Patent
active
049938193
ABSTRACT:
In an external gunsight viewing apparatus, a housing is provided having a first port coupled to the eyepiece of a gunner's optical sight. A prism is disposed along a common axis between the gunner's eyepiece and a viewing port. The prism folds the image path to an Erfle lens which produces an internal image. The internal image is viewable through a beam combining means, along with a second projected image, folded via a mirror, into the image combining means. A second relay means and additional mirror means direct the combined image along a relay means where they are located along the common axis between the eyepiece and first viewing port.
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General Electric, "Vulcan Air Defense Field Training System", Sep. 1969, four page brochure.
Bentley Stephen C.
DBA Systems, Inc.
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