Title:
AUTOMATIC ZOOMING MECHANISM FOR VIDEO CAMERA
Document Type and Number:
Japanese Patent JPH05100143
Kind Code:
A
Abstract:
PURPOSE:To automatically execute zooming including even a macro area and to easily execute focusing at that time. CONSTITUTION:A zoom ring 1 is adjusted to be rotated all over the area of telephoto-wide angle-macro area by a zoom motor 7. The case that the zoom ring 1 exists in the telephoto-wide angle area, and the case that it exists in the macro area are detected by a focal lens 2. In the case that it exists in the telephoto-wide angle area, high voltage V1 is impressed on the motor 7 by the changeover of a switch 4 so as to rotate the zoom ring at high speed. In the case that the zoom ring 1 exists in the macro area, low voltage V2 is impressed on the motor 7 by the changeover of the switch 4 so as to rotate the zoom ring 1 at low speed. Thus, the focusing in the macro are; is facilitated.
Inventors:
NOZAKI MITSUYUKI
SHIMANE AKIO
IZUMI KEIJI
SHIMANE AKIO
IZUMI KEIJI
Application Number:
JP26037291A
Publication Date:
April 23, 1993
Filing Date:
October 08, 1991
Export Citation:
Assignee:
TOSHIBA CORP
TOSHIBA AVE KK
TOSHIBA AVE KK
International Classes:
G02B7/08; G02B7/105; H04N5/232; (IPC1-7): G02B7/08; G02B7/105; H04N5/232
Attorney, Agent or Firm:
Takashi Honda
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