A second prism (7) is provided with two second surfaces (9, 11) which define the second prism angle (β) in-between them.

Light of the second spectral range (G) is at least essentially reflected at an angle of incidence (2β - α) which is at least approximately equal to the difference of the doubled second prism angle and the first prism angle.

The arrangement for spectral chromatic separation comprises a first prism (1) with two first surfaces (3, 5) which include a first prism angle (α) in-between them.

The faces of adjacent prisms extend longitudinally along the cylindrical wall member and are aligned at the same desired prism angle relative to one another.

Polyethylene terephthalate film with a thickness of less than 300 μm according to ASTM D2103, having on one side prisms of acrylic resin with a prism angle of 90 ° and a prism pitch of 50 μm