Abstract
Publisher Summary This chapter discusses the laboratory tests and astronomical application of an image intensifier with a 146 mm diameter photocathode. An extensive program of testing and application of a large format image intensifier has been underway at Steward Observatory. This chapter describes this image intensifier, outlines the results of the evaluation of the device, and comments on some of the astronomical applications for which this tube is being used. A photograph of the tube/camera assembly indicates the major components of the system. The sub-assemblies consist of: a rectangular unit containing filter slides, a dark slide, and a test pattern projector; a cylindrical unit that houses the image tube, its solenoid, and a solenoid cooling jacket; a plate holder; and an interchangeable eyepiece unit. An application of the large format image intensifier to the problems of BL Lacertae objects is the study of underlying structure and galaxy population in the vicinity of the objects. For this purpose, deep, high resolution photographs of several BL Lacertae objects using a variety of red filters are obtained.
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