Proxitronic Funk Gmbh & Co. Kg

Bernd Engel

Kurt Frank

Hans W Funk

Hans-Wolfgang Funk

In an image intensifier comprising an evacuated vessel with a first disk which forms an input window and on whose inner surface a photocathode is disposed, and with a second disk which forms an output window and on whose inner surface a fluorescent screen is disposed. The spacing between the first and second disks is small in relation to the diameter of the image intensifier. The input and output windows are plane-parallel, and a spacer ring is disposed between the first and second disks whose inside diameter increases from the area of the first disk in the direction of the second disk. The spacer ring is spaced at its inside diameter as close as possible to the first disk.

Proximity focused image intensifier having a glass spacer ring between a

In order to increase the sensitivity of television cameras so as to allow the cameras to operate in low level light, an image transformer attachment, in the form of an ancillary image intensifier, is provided for attachment to the objective lens opening of the camera. The attachment includes a cylindrical housing containing one or more proximity-focus image converters or intensifiers which are optically connected to the pick-up tube of the camera by a fiber optics cylindrical block. The housing includes an annular disk screwed into its input end, which disk has an opening for the objective lens of the camera and which disk urges a resilient ring against the image transformers to bias the intensifier and fiber optics block against the pick-up tube of the camera. At its output end, the camera has another annular disc with a threaded projection thereon, which projection is received in the threaded opening normally holding the objective lens of the camera to retain the attachment housing in fixed relation with respect to the camera while the first disk is screwed into the housing.

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Grosse-Gerau, Germany

Bernd Engel