Method and apparatus for sensing the figure of optical elements

Details Method and apparatus for sensing the figure of optical elements Method and apparatus for sensing the figure of optical elements

1988-11-17

1990-05-15

Evans, F. L.

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

2502011, 350613, G01B 900

Patent

active

049253018

ABSTRACT:
A laser source 28 and curvature matching optics 30 cooperate to generate a probe beam 32 having a generally Gaussian phase front with a given radius of curvature. The probe beam is reflected off of the surface of a primary mirror 12 and the differences, if any, between the radii of curvature of the probe beam 32 and mirror surface is detected by detector array 38. Suitable feedback circuitry can be employed to drive the actuators of segments 16-22 to provide the mirror 12 with the desired figure.

REFERENCES:
Morrison, "Development Problems of the Primary Mirror for Large Space Telescopes", SPIE Journal, May, 1970, pp. 107-118.

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