Showing papers on "Adaptive optics published in 1973"
TL;DR: The SLAC storage ring SPEAR as mentioned in this paper emits up to 150 kW per beam of synchrotron radiation, which can be absorbed before the beam passes through a window by having the radiation strike a metal mirror from which the visible light is reilected and in which the s-rays are absorbed.
Abstract: The SLAC storage riw SPEAR, emits up to 150 kW per beam of synchrotron radiation. The power density on components inside the ring reaches 1 kW per cm2, so transpnrent vrindows struck directly by the synchrotron radiation are out of the question. Only 3 x 10T4 of the total radiated power is visible light at 1. .5 GeV. This power can be absorbed before the iight passes through a window by having the radiation strike a metal mirror from which the visible light is reilected and in which the s-rays are absorbed.
17 citations
01 Jul 1973
TL;DR: In this paper, a wavefront error simulator is presented along with the Hartmann test, the shearing polarization interferometer, the Zernike test, and the zernike polarization test.
Abstract: Partial results are presented of theoretical and experimental investigations of different focal plane sensor configurations for determining the error in a telescope wavefront. The coarse range sensor and fine range sensors are used in the experimentation. The design of a wavefront error simulator is presented along with the Hartmann test, the shearing polarization interferometer, the Zernike test, and the Zernike polarization test.
7 citations
TL;DR: The automatic wavefront error sensor has been developed for determining the wave front error of an optical system, which measures the ray intercept error and automatically converts this to a waveFront error.
Abstract: The automatic wavefront error sensor has been developed for determining the wavefront error of an optical system. The instrument, which provides a null test for a parabola, measures the ray intercept error and automatically converts this to a wavefront error. Both the ray fan plot and the wavefront error curve are plotted simultaneously. Ray intercept errors smaller than 0.1 μm can be measured, providing wavefront error information with interferometric sensitivity.
7 citations
TL;DR: In this paper, the amplitude and phase response of an optical viewer is controlled by a variable source size condensing system and an attenuation filter in the pupil of the imaging lens.
Abstract: Optical viewing systems have been well designed for specific applications. However, partial coherence evaluation of the optical viewer illustrates potential for control of the frequency response to phase and amplitude components of the photographic image (where the phase component is due to the emulsion relief image). The complex image formed by the partially coherent system contains a separable response to the phase and amplitude components for a low contrast object. Optical frequency response control is applied to the complex image by design of a variable source size condensing system and by inserting an attenuation filter in the pupil of the imaging lens. Illustrations are given to show the adaptability of the system response to low contrast images.
5 citations
1 citations