Head-up display units and optical devices

Details Head-up display units and optical devices Head-up display units and optical devices

1974-05-31

1976-02-03

Grimm, Siegfried H.

Telegraphy

Systems

Printing

178 785, 178DIG20, 340 27NA, 350174, 350286, 350301, 353 12, G02B 504, G02B 2710

Patent

active

039361489

ABSTRACT:
A head-up display unit for use for example in an aircraft has (a) a porthole part of a source of collimated luminous signals disposed directly in the field of view of an observer when looking at a scene ahead of him from an observation position thus obscuring part of his view and (b) a combining optical system disposed adjacent the porthole part and having plane optical surfaces which transmit to the observer's eyes light from the porthole directly, and light from the scene ahead by reflection, whereby the observer sees in superposed relationship the scene ahead and a display of collimated luminous signals. In a preferred arrangement the plane optical faces are constituted by plane boundary faces of prisms cemented together to form a stable assembly.

REFERENCES:
patent: 3737212 (1973-06-01), Antonson et al.
patent: 3814496 (1974-06-01), Mukai

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