> as lemmas
on-axis
on-axis adj. 
/ˌɑnˈæksəs/ situated or occurring on an axis of rotation or of symmetry.
Brit. /ˌɒnˈaksɪs/
, /ˌɒnˈaksɪs/U.S. /ˌɔnˈæksəs/
, /ˌɔnˈæksəs//ˌɑnˈæksəs/ΘΚΠ
the world > space > relative position > central condition or position > [adjective] > situated in the centre or middle > situated on the axis
on-axis1952
the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [adjective] > on or close to axis
paraxial1906
on-axis1952
1952 Science 22 Aug. 204/1 All the flux can be considered to be contained in an infinitesimal on-axis pencil.
1971 R. J. Collier et al. Optical Hologr. ii. 54 On-axis observation of either image is disturbed by the out-of-focus light from the other.
1990 Gramophone May 2096/1 These include the main on-axis frequency response of the loudspeakers.
<
as lemmas