Folding laser mirror

Details Folding laser mirror Folding laser mirror

1980-01-14

1981-04-28

Henry, Jon W.

G02B 718, G02B 508

Patent

active

042641462

ABSTRACT:
A laser mirror adapted to prevent astigmatism of reflected laser beams where the mirror is used for "folding" the laser beam such that the incident laser beam direction is not normal to the reflective surface of the mirror. This is accomplished by the provision of slots of specified dimensions in the rear surface of the mirror that in use are disposed parallel to the major axis of the laser beam's image on the mirror. In this manner, the mirror is provided with two bending stiffnesses, one in the direction of the major axis that is greater than that in the direction of the minor axis such that the bending due to heating of the mirror in the direction of both axes is made at least substantially equal.

REFERENCES:
patent: 3637296 (1972-01-01), McLafferty et al.
patent: 3645608 (1972-02-01), Staley et al.
patent: 3708223 (1973-01-01), Sorenson et al.
patent: 3731992 (1973-05-01), Mansell
patent: 3861787 (1975-01-01), Locke et al.
patent: 3884558 (1975-05-01), Tobin et al.
patent: 3926510 (1975-12-01), Locke et al.
patent: 3942880 (1976-03-01), Zeiders, Jr.

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