The convex surface of the convex mirror (1) is a parabolic reflecting surface.
A convex mirror is provided on the front of the auxiliary mirror body.
A convex mirror is employed as either the first reflecting mirror (1) or the third reflecting mirror (3), and a concave mirror is employed as the other.
The deformable mirror may be a flat disk mirror, a convex mirror, or a concave mirror, and may include a membrane having a variable flexibility.
The fixing means (9, 10) make it possible to assemble either a flat mirror (10) or a curved convex mirror (12).
The two mirrors include at least one convex or concave mirror.
The subchamber 4D has openings 4Da, 4Db through which the exposure light EL coming into the curved mirror 24 and the exposure light EL exiting from the curved mirror 24 pass, respectively.
A light collection system for use in buildings consisting of a concave mirror with a convex mirror aligned on the focal axis of the concave mirror (10) inside the focal point of the concave mirror (10).