公开(公告)号：IT8419627D0

公开(公告)日：1984-02-15

申请号：IT1962784

申请日：1984-02-15

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND JR

IPC: H01J29/07 ,  H01J29/86 ,  H01J31/20 ,  H01J

Abstract: A cathode-ray tube includes a shadow mask mounted therein. The mask has curvatures along its major and minor axes. The curvature along the major axis is greater at the sides of the mask than at the center of the mask.

公开(公告)号：IT8119486D0

公开(公告)日：1981-02-03

申请号：IT1948681

申请日：1981-02-03

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND JR

IPC: G01B11/02 ,  H01J9/227 ,  H01J9/42 ,  G01B

Abstract: In the novel method, the widths of the parallel luminescent stripes of a luminescent viewing screen are scanned by a beam of ultraviolet light whereby the stripes are excited to emit light along the path of scan. The emissions of the light in an identifying spectral band are sensed with respect to the position of the light beam on the screen and converted to a train of electrical signals. Then, the average width of the stripes identified by the spectral band is calculated from the distance over which the intensities of the signals are continuously above an assigned value.