A grating tuned laser system having an anamorphic optical section (72) that produces a line image on the grating (73). This system is insensitive to tilt of the grating (73) about an axis (T) perpendicular to the rulings (74) of the grating (73). An embodiment that utilizes a degenerate external cavity...http://www.google.com/patents/US4942583?utm_source=gb-gplus-sharePatent US4942583 - Misalignment-tolerant, grating-tuned external-cavity laser
