公开(公告)号：DE2938296A1

公开(公告)日：1980-04-03

申请号：DE2938296

申请日：1979-09-21

Applicant: RCA CORP

Inventor： DISCHERT ROBERT

IPC: G05D3/12 ,  G05B1/01 ,  H04N5/235 ,  H04N5/238 ,  H04N5/26

Abstract: The extreme up and down positions of an iris control generate special binary digital codes. There special codes when decoded cause an up-down counter to be responsive to clock pulses and corresponding count up or down. The output of the counter is converted to an analog voltage which in turn controls the position of a camera iris. The iris opening is changed at a constant ranging rate determined by the clock when the lever is in the extreme positions. When the lever is between these extreme positions the iris is no longer changing at a constant ranging rate but rather is directly selected by the position of the lever.

公开(公告)号：DE2965175D1

公开(公告)日：1983-05-19

申请号：DE2965175

申请日：1979-02-22

Applicant: RCA CORP

Inventor： ASTLE BRIAN ,  DISCHERT ROBERT

IPC: H04N17/02 ,  H04N9/04 ,  H04N9/62