Engineering topics
Publications and source records attributed to Robertson, H. J..
Mirrors produced for various optical systems require precise surface finishing. Sensor, developed for measuring mirror surface, is compensated for interferences from temperature and air disturbances and is capable of measuring mirrors with diameters of up to 2 meters.
The active optics concept using a thin deformable mirror has been successfully demonstrated using a 30 in. diameter, 1/2 in. thick mirror and a 61 point matrix of forces for alignment. Many of the problems associated with the design, fabrication, and launch of large aperture diffraction-limited astronomical telescopes have been resolved and experimental data created that can provide accurate predictions of performance in orbit.
The advanced Figure Sensor Study which examined approaches for measuring parabolic mirror surfaces is reported. This report deals only with the final test results obtained from the working model of the Advanced Figure Sensor. It also describes the construction of the unit.
This manual contains procedures for installing, operating, and maintaining the optical figure sensor and its associated electronic controls. The optical figure sensor, a system of integrated components, comprises: (1) a phase measuring modified interferometer employing a single frequency 6328 A laser, and a Vidissector; (2) a two-axis automatic thermal compensation control mount; (3) a five degree of freedom manual adjustment stand; and (4) a control console. This instrument provides real time output data of optical figure errors for spherical mirrors, and is also capable of measuring aspherical mirrors if a null corrector is added.
Explore the source record for details and available documents.
Active optics concept development using thin deformable mirrors
Dynamic stability of multipoint servocontrol system actuating thin deformable primary mirror of orbiting telescope
Control system for thin diffraction limited orbiting astronomical telescope mirror based on structural analysis of static deflections
Continuous monitoring and control of primary mirror figure of orbiting, diffraction limited astronomical telescope for optimum performance
Active optical system for spaceborne, orbiting telescopes