The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 1994
Filed:
Sep. 16, 1992
Robert E Wallace, Garland, TX (US);
Varo Inc., Garland, TX (US);
Abstract
There is provided an improved optical viewing device (10) in which variable compass heading information (80) and stadiametric range measuring information (88), (106), (118) is superimposed upon the image of a scene viewed through a viewing optical system (13) within the device (10). A self-luminous display panel (36) displays the information in the form of graphical symbols and/or alphanumeric characters. A folding lens (38) reflects light from the display panel (36) to a correcting lens (40), which transmits the light to a reflecting means (41) or (52). The reflecting means (41) or (52) reflects the light to a mangin mirror (44) or (62), which reflects the light to a dichroic combiner (28) or (50). The dichroic combiner (28) or (50) transmits the light into the path of the viewing optical system (13) such that the information displayed on the display panel (36) is effectively superimposed upon the image of the scene viewed by the user. A dichroic coating on dichroic combiner (28) or (50) reflects light of wavelengths associated with the viewing optical system (13) and transmits light associated with the illuminated display panel (36). An alternative embodiment employs a holographic element (72) to superimpose the information from display panel (36) upon the image of the scene.