Interferometric measuring device

Claim 1

ORIENTATION MEANS FOR THE MOVABLE REFLECTOR AND PART-CONTACTING ELEMENT OF A WHITE LIGHT INTERFEROMETER AND COMPRISING A UNITARY PARALLEL REED DEVICE COMPRISING A RIGID BASE PORTION, SUBSTANTIALLY PLANAR RIGID SIDE PORTIONS EXTENDING UPWARDLY FROM OPPOSITE ENDS OF SAID BASE PORTION AND HAVING A CENTRAL OPENING IN EACH, A RIGID TOP PORTION JOINING THE UPERMOST ENDS OF SAID SIDE PORTIONS, AND A RIGID CENTRAL PORTION DEPENDING FROM SAID TOP PORTION AND TERMINATING AT A POINT ABOVE SAID BASE PORTION AND FURTHER DOWNWARD THAN HALFWAY BETWEEN SAID TOP AND SAID BASE THEREBY PROVIDING PARALLEL MOUNTING SURFACES FOR SAID MOVABLE REFLECTOR ANDF SAID PART-CONTACTING ELEMENT, EACH OF SAID SIDE PORTIONS HAVING AT LEAST TWO SEPARATED REGIONS OF ESSENTITALLY EQUALLY REDUCED WALL THICKNESS CONSTITUTES A TRANSVERSE LINE OF DRASTICALLY REDUCED BENDING MOMENT THEREBY IMPARTING TO SAID DEVICE A SINGLE DEGREE OF FREEDOM OF MOVEMENT, SAID DEGREE OF FREEDOM OF MOVEMENT BEING RECIPROCATION PERPENDICULAR TO THE PLANE OF SAID CENTRAL PORTION.