Pulfrichn.

Brit.

/ˈpʊlfrɪx/,

/ˈpʊlfrɪk/, U.S.

/ˈpʊlfrɪk/

Origin: From a proper name. Etymon: proper name Pulfrich.

Etymology: < the name of Carl Pulfrich (1858–1927), German physicist, who described the illusion ( Naturwissensch. 10 (1922) 552).

attributive and in the genitive. Used with reference to an optical illusion in which a pendulum appears to describe ellipses instead of a linear arc when viewed with one eye covered with a dark filter and the other eye uncovered.

ΘΚΠ

the world > physical sensation > sight and vision > thing seen > optical illusion > [adjective] > optical distortions

Zöllner1890

Schröder1898

Pulfrich1925

1925 Brit. Jrnl. Ophthalm. 9 65 Men, getting on in years, who have been expert in games with a moving ball, find themselves unable to judge its position with their former accuracy... Pulfrich's phenomenon seems to give a probable explanation.

1941 S. H. Bartley Vision vii. 170 Pulfrich's stereoscopic pendulum is another example of a set of conditions which will induce the perception of movement of a kind not corresponding with the real movement of a physical object.

1966 R. L. Gregory Eye & Brain vi. 78 A curious and dramatic phenomenon known as the Pulfrich Pendulum Effect.

1980 Sci. Amer. May 134/2 According to most hypotheses about the Pulfrich illusion, the dark filter delays the perception of the visual signal at the retina of the covered eye.

1991 New Scientist 13 July 26/2 Nuoptrix relies on a phenomenon known as the Pulfrich effect, which is the optical equivalent of artificial stereo.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	pulfrich
释义	Pulfrichn. Brit. /ˈpʊlfrɪx/, /ˈpʊlfrɪk/, U.S. /ˈpʊlfrɪk/ Origin: From a proper name. Etymon: proper name Pulfrich. Etymology: < the name of Carl Pulfrich (1858–1927), German physicist, who described the illusion ( Naturwissensch. 10 (1922) 552). attributive and in the genitive. Used with reference to an optical illusion in which a pendulum appears to describe ellipses instead of a linear arc when viewed with one eye covered with a dark filter and the other eye uncovered. ΘΚΠ the world > physical sensation > sight and vision > thing seen > optical illusion > [adjective] > optical distortions Zöllner1890 Schröder1898 Pulfrich1925 1925 Brit. Jrnl. Ophthalm. 9 65 Men, getting on in years, who have been expert in games with a moving ball, find themselves unable to judge its position with their former accuracy... Pulfrich's phenomenon seems to give a probable explanation. 1941 S. H. Bartley Vision vii. 170 Pulfrich's stereoscopic pendulum is another example of a set of conditions which will induce the perception of movement of a kind not corresponding with the real movement of a physical object. 1966 R. L. Gregory Eye & Brain vi. 78 A curious and dramatic phenomenon known as the Pulfrich Pendulum Effect. 1980 Sci. Amer. May 134/2 According to most hypotheses about the Pulfrich illusion, the dark filter delays the perception of the visual signal at the retina of the covered eye. 1991 New Scientist 13 July 26/2 Nuoptrix relies on a phenomenon known as the Pulfrich effect, which is the optical equivalent of artificial stereo. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1925
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