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We consider J/psi photoproduction in e+ e- as well as linear photoncolliders. We find that the process is dominated by the resolved photonchannel. Both the once-resolved and twice-resolved cross-sections are sensitiveto (different combinations of) the colour octet matrix elements. Hence, thismay be a good testing ground for colour octet contributions in NRQCD. On theother hand, the once-resolved J/psi production cross-section, particularly in alinear photon collider, is sensitive to the gluon content of the photon. Hencethese cross-sections can be used to determine the parton distributionfunctions, especially the gluon distribution, in a photon, if the colour octetmatrix elements are known.Comment: Added a figure on parametrisation dependence of photonic parton  densities and some reference

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

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J/ψproduction through resolved photon processes ate+e−