Patent ID: 11880025
Assignee: CANON KABUSHIKI KAISHA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical system to divide a light flux, the optical system comprising:
a first reflecting portion having a reflective surface;
a second reflecting portion including a plurality of second reflective surfaces configured to divide the light flux, wherein the second reflecting portion is configured to guide each of the light fluxes divided by the plurality of second reflective surfaces to respective positions, different from one another, on the first reflecting portion; and
an optical portion configured to perform image formation with each of the light fluxes divided by the second reflecting portion and reflected by the first reflecting portion so that images equal in number to a division number in the dividing of the light flux by the second reflecting portion are formed,
wherein the images equal in number to the division number formed by the image formation include images of a first group which are linearly arranged and images of a second group which are linearly arranged in another line different from a line in which the images of the first group are linearly arranged.