Pavel M. Semenov

Correction of Telescope's Primary using Dynamic Holography in Optically Addressed Liquid Crystal Spatial Light Modulator

Abstract Large numerical aperture telescope with nonlinear optical correction for distortions, designed for the remote self-luminous object imaging, was realised in experiment and investigated. Dynamic hologram, recorded in optically addressed liquid crystal spatial light modulator, was used as the corrector. Nearly diffraction limited performance of the system was demonstrated.

Experimental realization of the laser telescope with overall compensation for distortions via phase conjugation

For the first time was realized the laser telescope (beam director), in which the phase conjugation provides the comprensation for the distortions, caused by the primary and secondary mirrors. Nearly diffraction limited laser beam divergence was realized under the significant disadjustments and disalignments of the segmented mirror.

Holographic correction in mid-IR using OA LC SLM elements

Paper presents the results of experimental demonstration of dynamic holographic correction in mid-IR, using optically addressed liquid crystal spatial light modulators and method of two-wavelength holography, when the hologram is recorded at one wavelength and reconstructed at some shifted wavelength. On such a basis one can realize the dynamic interferometer, providing the arbitrary scaling of the wave front distortions and thus to record the dynamic hologram on the differential wavelength, which can be used for dynamic holographic correction of distortions in mid-IR. Method feasibility was confirmed in experiment.

White-light imaging using large-numerical-aperture telescope with dynamic holographic correction for primary mirror distortions

Large numerical aperture telescope with nonlinear optical correction for distortions, designed for the remote self- luminous object imaging, was realized in experiment and investigated. Dynamic hologram, recorded in optically addressed liquid crystal spatial light modulator, was used as the corrector. Nearly diffraction limited performance of the system was demonstrated.

Experimental realization of a laser telescope with overall compensation for distortions via phase conjugation

For the first time was realized the laser telescope (beam director), in which the phase conjugation provides the compensation for the distortions, caused by the primary and secondary mirrors. Nearly diffraction limited laser beam divergence was realized under the significant disadjustments and disalignments of the segmented mirror.

Large numerical aperture imaging bypass system with dynamic holographic correction for primary mirror distortions

Large numerical aperture telescope with nonlinear optical correction for distortions, designed for the remote self- luminous object imaging, was realized in experiment and investigated. Dynamic hologram, recorded in optically addressed liquid crystal spatial light modulator, was used as the corrector. Nearly diffraction limited performance of the system was demonstrated.

Wide-aperture laser telescope with the phase-conjugation compensation of the segmented main mirror

The results cI experimental realizaticu of the 1as telescce with the phase-axijugation axnpensaticii 1 segmented main mirrcr w ith the diameter 300 mm, focal length 1200 mm are presented. The expiment results, which are correlated witti the numerical model results, show the pcssibility of diffraction limited image formation while segments angle irusmatch is up to 13X 1O and step mistake up to several dozen of micrometers.

System of phase conjugation with a two-stage holographic corrector recording scheme

The paper presents the results of experimental demonstration of phase conjugation of weak laser radiation by means of two-stage dynamic holography in optically addressed liquid crystal spatial light modulator, implementing the TV-relay of the interferometery data for the record of hologram-corrector.

Imaging bypass system with correction for primary mirror distortions

Large numerical aperture telescope with nonlinear optical correction for distortions, designed for the remote self- luminous object imaging, was realized in experiment and investigated. Dynamic hologram, recorded in optically addressed liquid crystal spatial light modulator, was used as the corrector. Nearly diffraction limited performance of the system was demonstrated.

Large-numerical-aperture imaging bypass system with dynamic holographic correction for primary mirror distortions

Large numerical aperture telescope with nonlinear optical correction for distortions, designed for the remote self- luminous object imaging, was realized in experiment and investigate. Dynamic hologram, recorded in optically addressed liquid crystal spatial light modulator, was used as the corrector. Nearly diffraction limited performance of the system was demonstrated.