Camera Capabilities Research Articles

A 1.3 Megapixel Resolution Portable CCD Electronic Still Camera

ABSTRACT Portable electronic still cameras have been available for some years although, in general, the imagequality has fallen short of the 35 mmfilm quality benchmark. To obtain improved image capture andreproduction, higher resolution CCD imagers with wider dynamic ranges must be employed in thesecameras.A camera system composed of a 35 mmNikon F3 camera body, a camera back containing a CCI)-imager, and a portable hard drive for storing digitiZed images was constructed and employed to acquireimages distributed over photospace. This paper describes the camera's hardware and capabilities, the software post-processing, the camera's characteristics, and a method for evaluating the camera's performance. 1. INTRODUCTION Portable electronic still cameras possess numerous advantages as well as disadvantages compared to film-based cameras. Among the advantages are rapid image availability without the chemical processing step required by film, and direct input capability to computers for applications requiringimage data. However, while the image quality obtainable with these cameras may be acceptable fordisplay on a video monitor, their overall quality has proven to be too low for many applications. A

High quality fluorescence decay curves and lifetime imaging using an elliptical scan streak camera

The high quality fluorescence decay curves obtained with an elliptical scan streak camera are presented and compared with those obtained using the time-correlated single-photon counting (TC-SPC) technique. It is shown that the streak camera employed overcomes a long-standing difficulty associated with other types of streak camera in that accurate decay times longer than 3 ns can be measured and reliable lifetimes in the range 90 ps (limited by the laser pulse width employed) to 13 ns are obtained. To show the capability of this streak camera, three-component decays of solid tetraphenyl porphyrin (TPP) and preliminary results of the fluorescence lifetime imaging of a cross-section of a camellia leaf are given.

Multilens Cameras For High Velocity/Low Altitude Photoreconnaissance

After an outline of the fundamentals of the multilens array combined with focal plane shutter and angle-correct forward motion compensation, the KS-153A Trilens and Pentalens arrays are described. Then the special ground resolution capability of the multilens camera is compared to that of the tri-camera fan, and the geometric imaging capability is compared to that of the panoramic scan camera.

First Results Concerning the Capability of a TV Camera for Double Star Observations

SummaryThe results of some first laboratory analysis of double star images recorded with a TV camera are presented.The camera – already in use since a few years for occultation-timings has been described earlier. For double star observations, the equipment has been completed by a video disc memory, a video analyser with analogic-digital converter and a small programmable calculator.Details are given about this equipment and its possibilities. The reduction method in its present state is described as well as some first results. These show a very good internal agreement leading to a high promising new observational technique.

Television Pictures of the Lunar Surface by Earthshine

The Surveyor spacecraft TV camera has been modified to provide a light integration capability, or bulb mode, to obtain pictures of the lunar surface with only the light reflected from the earth's disc as the illuminating source. The objective is to take pictures of the lunar surface in the event of pre-sunrise landings, but other purposes soon became apparent. Compared with the original Surveyor camera's capability to view stars down to a magnitude of 2, the integrated-mode design allows stars to be viewed down to magnitude 6, with a theoretical limit of magnitude 8. Another interesting application is the detection of the extent of radiation of the corona at various radii from the edge of the solar disc after sunset.