Optics: measuring and testing – Fiducial instruments – Reticle lies outside viewing path
Patent
1987-04-29
1988-12-27
Willis, Davis L.
Optics: measuring and testing
Fiducial instruments
Reticle lies outside viewing path
340705, 340767, 340782, G02B 2734, G02B 2736
Patent
active
047944307
ABSTRACT:
Disclosed is a reticle generator having an azimuth array (64) of light emitting diode filament lines and an elevation array (66) of orthogonal light emitting diode filament lines. The arrays (64, 66) are fixed by rigid bracket members (136, 144) with respect to the faces (74, 80) of a partially reflecting prism (76). An illuminated LED filament line projected into the prism (76) by azimuth array (64) is reflected by the partially reflecting surface (82), and emitted from prism face (84). A selected LED filament (78) from elevation array (66) is transmitted through the prism (76) and emitted from face (84) and thus superimposed with the azimuth filament line (72).
REFERENCES:
patent: 3824581 (1974-07-01), Ohno
patent: 4114366 (1978-09-01), Renner et al.
patent: 4274092 (1981-06-01), Vonusa et al.
patent: 4404890 (1983-09-01), McAlpine
patent: 4542986 (1985-09-01), Berdanier
patent: 4567478 (1986-01-01), Schwab
Isbell Wayne E.
Sorensen, III Peter
Whittaker Thomas F.
Koren Matthew W.
Mills Jerry W.
Varo Inc.
Willis Davis L.
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