1988-05-27
1990-02-20
Henry, Jon W.
350503, 350174, 350145, G02B 1708, G02B 2710, G02B 2310, G02B 2304
Patent
active
049021168
ABSTRACT:
A helmet display system including a display arrangement (5) located between a helmet body (1) and a helmet visor (3). The display arrangement (5) includes right and left collimating eyepieces (7,9) and a projector (11) which in operation projects bright data for reflection by the eyepieces (7,9) to respective right and left eye positions (13,15). The user 17 of the helment display system is therefore presented with a display of bright data superimposed on the view of the distant scene. Each eyepiece (7,9) is supported at a respective one of two ports (27,29) of a housing arrangement (31) containing light paths leading from a bright data source (33) of the projector (11) to the eyepieces (7,9) by way of an optical system (35) of the projector (11) including a Petzval relay lens (55,57) and reflective elements (37,45,47,49,51,53). At the right port (27) there is a clear light transmissive portion (34) which is contiguous with the right eyepiece (7). The portion (34) extends upwardly the angular range of the field of view available from the right eye position (13).
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GEC--Marconi Limited
Henry Jon W.
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