Optical: systems and elements – Scale or indicia reading – Prism
Patent
1998-04-30
2000-10-31
Shafer, Ricky D.
Optical: systems and elements
Scale or indicia reading
Prism
359834, 359833, 359831, 359436, 356138, 356139, 356148, 33488, G02B 504, G02B 704, G01C 106, G01C 310
Patent
active
061411477
ABSTRACT:
An optical unit for projecting an image including first and second locating lines for substantially eliminating the introduction of visual parallax error. In one preferred form, the optical unit is incorporated into a machine for performing a forming operation on a workpiece and is operative to project an image of a portion of a scale to a position easily read by the user during machine operation. The optical unit includes a prism portion having a first side disposed adjacent the scale, a second side at an angle to the first side for reflecting the image and a third side through which the projected image may be viewed. The first locating line is disposed on the first side and the second locating line is disposed on the third side such that visual alignment eliminates the introduction of visual parallax error associated with reading a scale.
REFERENCES:
patent: 1671272 (1928-05-01), Buckingham
patent: 1682034 (1928-08-01), Burmister
patent: 2547731 (1951-04-01), Bailey
patent: 2873776 (1959-02-01), Buttke
patent: 2933013 (1960-04-01), Baker et al.
patent: 2983183 (1961-05-01), Pickering
patent: 3019022 (1962-01-01), Ehmke
patent: 3073210 (1963-01-01), Packard
patent: 3636915 (1972-01-01), Ruppert
patent: 3712262 (1973-01-01), Kisselmann et al.
patent: 3718168 (1973-02-01), Berends
patent: 3806247 (1974-04-01), Fabryey et al.
patent: 3889187 (1975-06-01), Kisselmann et al.
patent: 4255056 (1981-03-01), Jagers
patent: 4257164 (1981-03-01), Task et al.
patent: 4436126 (1984-03-01), Aoki et al.
patent: 4986631 (1991-01-01), Aoki et al.
patent: 5191485 (1993-03-01), Kahle
patent: 5261349 (1993-11-01), Iino et al.
patent: 5295050 (1994-03-01), Helstern et al.
patent: 5311222 (1994-05-01), Buckley et al.
patent: 5317486 (1994-05-01), Schmitt
patent: 5335114 (1994-08-01), Suzuki
patent: 5640777 (1997-06-01), Densberger et al.
patent: 5795113 (1998-08-01), Wixey et al.
F. Schedewie, M. Kallmeyer, B. Solf, D. Wagner: "Ein neues elektrooootisches Kantenfindermikroscop fur die Halbleitertechnologie" Internationale Elektronische Rundschau, vol. 25, Apr. 1971, p. 93 XPOO2046125 "figure 1".
Welsh Robert P.
Wixey Barry D.
Black & Decker Inc.
Shafer Ricky D.
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