Abstract: A problem to be solved by the present invention is to provide a prepreg and an integrally molded article, wherein the prepreg exhibits suitable flexibility and adhesiveness, excels in formability on a complicated mold face and adhesion to a mold face, causes no positional shift, and can be efficiently reinforced and stiffened at an intended position. A main object of the present invention is to provide a prepreg including (A) reinforcing fibers, (B) a thermosetting resin, and (C) a thermoplastic resin, wherein the (C) thermoplastic resin exists in at least a part of a face of the prepreg, and wherein the prepreg satisfies the condition [I], and satisfies the condition [II] or the condition [III]: [I]: the (B) thermosetting resin has a peak in the temperature range of more than 100° C. and 180° C.

Abstract: A light scanning system employing a rotating mirror, spherical lens, and a toric-surfaced reflecting mirror. The toric-surfaced reflecting mirror is disposed in the optical path between the spherical lens and the image plane. The spherical lens sufficiently corrects field curvature and the toric-surfaced reflecting mirror corrects scan nonlinearity. And by the spherical lens and the toric-surfaced reflecting mirror together, the field curvature and the scan nonlinearity are satisfactorily corrected. The toric-surfaced reflecting mirror is surfaced to have a circular arc with a larger radius of curvature in the scan plane and to have a circular arc with a smaller radius of curvature in the cross-scan plane.