Commercial CCD Camera Research Articles

Quantitative imaging and diffraction of zeolites using a slow-scan CCD camera

We demonstrate ways in which structural information on zeolites can be obtained from high-resolution images and electron diffraction patterns. We employ a commercial slow-scan CCD camera to record the data and demonstrate the advantage of on-line data processing and analysis. Quantitative agreement is obtained between experimental electron diffraction intensities and theoretical calculations. Real-space averaging is a versatile technique which can be employed to reduce the effects of both noise and radiation damage. Under favorable circumstances the weak-phase object approximation can be used to simplify image interpretation and quantification.

Quantitative imaging and diffraction of zeolites using a slow-scan CCD camera

Abstract We demonstrate ways in which structural information on zeolites can be obtained from high-resolution images and electron diffraction patterns. We employ a commercial slow-scan CCD camera to record the data and demonstrate the advantage of on-line data processing and analysis. Quantitative agreement is obtained between experimental electron diffraction intensities and theoretical calculations. Real-space averaging is a versatile technique which can be employed to reduce the effects of both noise and radiation damage. Under favorable circumstances the weak-phase object approximation can be used to simplify image interpretation and quantification.

Pattern recognition of star constellations for spacecraft applications

A software system for a star imager for online satellite attitude determination is described. The system works with a single standard commercial CCD camera with a high aperture lens and an onboard star catalog. It is capable of both an initial coarse attitude determination without any prior knowledge of the satellite orientation and a high-accuracy attitude determination based on prediction and averaging of several identified star constellations. In the high-accuracy mode the star image aims at an accuracy better than 2 arc sec with a processing time of less than a few seconds. The star imager has been developed for the Danish Oersted satellite.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

A high-resolution Lidar–Thomson scattering diagnostic for JET

A LIDAR–Thomson scattering system with better than 5 cm spatial resolution to resolve edge electron temperature and density gradients in H-mode operation in JET is needed. A dynamic range in measurable electron temperature of 0.1–1.5 keV and a minimum detectable electron density of 1019/m3 are required. To achieve these levels of performance, it is planned to use a modified section of the existing JET LIDAR–Thomson scattering system. A new detection system, consisting of a streak camera and an intensifier unit, will be used. Spectral dispersion is to be performed by a three-channel edge filter spectrometer. Recording and digitization of the scattered signal will be performed by a CCD camera read out by a personal computer. The system is described and results of experiments to determine the minimum visible light levels using a commercial streak camera, intensifier unit, and CCD camera and a pulsed laser diode light source are briefly presented. In addition, simulations of expected signal-to-noise ratio performance are discussed.

A CCD CAMERA SYSTEM AT CAPILLA PEAK OBSERVATORY, NEW MEXICO

ABSTRACT We describe retrofitting a 61-cm Boller and Chivens reflector with a commercial CCD camera system for deep-sky imaging. Such an equipment upgrade can be done to similar small telescopes for similar costs. This increased sensitivity of the CCD compared to previous detectors greatly enhances the ability of small telescopes to perform many types of observations. The productivity of the telescope is greatly enhanced because of the new regimes of astronomical science opened by the instrumentation upgrade.