decentredecenterv.
/diːˈsɛntə/ 1. transitive. To remove the centre from (in quot. 1870, centre n.2 1).
ΚΠ
1870 Engineering X. 485/1 In 1847, M. Beaudemoulin..made use of sand in decentering arches.
2. To place out of centre; to render eccentric; spec. in Optics (see quot. 1889 for decentred adj. at Derivatives).
ΚΠ
1889 E. E. Maddox Clin. Use Prisms ii. 49 The dislocation of the optical centre..to be obtained by decentration proper, that is by decentering the lens in its rim.
1962 L. S. Sasieni Princ. & Pract. Optical Dispensing v. 126 The right lens may be decentred out and the left lens decentred inwards.
1964 Yearbook Astr. 1965 96 The stresses..tend to de-centre the secondary, making it move off the optical axis.
Derivatives
deˈcentrated adj.
ΚΠ
1909 Cent. Dict. Suppl. Decentrated.
decenˈtration n.
ΚΠ
1946 A. Huxley Let. 26 Oct. (1969) 551 Too much concentration defeats its own end, and..effective concentration has to work by a process of decentration.
1962 L. S. Sasieni Princ. & Pract. Optical Dispensing v. 126 The amount of decentration produced by the asymmetry..is..likely to have appreciable prismatic effect.
deˈcentred adj. (also de'centered)
ΚΠ
1889 E. E. Maddox Clin. Use Prisms ii. 45 A lens is said to be normally centred when the optical and geometrical centres coincide..but to be decentred when, as in Fig. 21, the optical centre O, and the geometrical centre G, are apart.
deˈcentring n. and adj. (also de'centering)
ΚΠ
1889 E. E. Maddox Clin. Use Prisms ii. 47 The word ‘decentering’ is generally applied to the removal of the optical centre away from the geometrical centre of the lens.
This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2018).
<
v.1870