An electronic camera with a remotely controlled shutter at the primary focus of the 3.60 M C.F.H. telescope

Details An electronic camera with a remotely controlled shutter at the primary focus of the 3.60 M C.F.H. telescope An electronic camera with a remotely controlled shutter at the primary focus of the 3.60 M C.F.H. telescope

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jopt...13..295b&link_type=abstract

Journal of Optics, vol. 13, Sept.-Oct. 1982, p. 295-301. In French.

Physics

Optics

11

Astronomical Photography, Electronography, Lallemand Cameras, Background Noise, Distortion, High Resolution, Magnitude, Modulation Transfer Function, Photocathodes

Scientific paper

Characteristics and performance of the electrostatic camera on the Canada-France-Hawaii telescope are described. The camera is used with S11 photocathodes, is chilled with liquid nitrogen, and has a resolution of 80 pl/mm. Control commands are transmitted over cable hook-up, with the input under the guidance of an 8-bit Z80 microprocessor. The S11 photocathodes are employed to produce images on electronographic plates and are not destroyed in the process. The modulation transfer function is quantified for the instrument, and image distortion, light diffusion, parasitic images, and system noise are discussed. Sample results from three observational periods are provided, covering imagery of the quasar PG 1115 plus 080, the BL Lacertae object Mrk 478, and the shoulder of the Orion nebula.

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