Main Camera
The main camera system was designed to take stereo images, with a forward looking camera on the port side, and an aft looking camera on the starboard side. The camera optical layout is a f/3.0 folded Wright Camera, with a focal length of 60 in (1.5 m). The system aperture is defined by a 20 in (0.51 m) diameter aspheric corrector plate, which corrects the spherical aberration of the Wright design. In each of the cameras the ground image passes through the corrector plate to a 45 degree angle flat mirror, which reflects the light to a 0.91 m (36 in) diameter concave main mirror. The main mirror directs the light through an opening in the flat mirror and through a four-element lens system onto the film platen. The cameras could scan contiguous areas up to 120 degree wide, and achieved a ground resolution better than 2 ft (0.61 m) during the later phase of the project.
Read more about this topic: KH-9 Hexagon
Famous quotes containing the words main and/or camera:
“I am a Communist, a convinced Communist! For some that may be a fantasy. But to me it is my main goal.”
—Mikhail Gorbachev (b. 1931)
“If I were just curious, it would be very hard to say to someone, “I want to come to your house and have you talk to me and tell me the story of your life.” I mean people are going to say, “You’re crazy.” Plus they’re going to keep mighty guarded. But the camera is a kind of license. A lot of people, they want to be paid that much attention and that’s a reasonable kind of attention to be paid.”
—Diane Arbus (1923–1971)