Title:
レンズ制御装置、方法及びコンピュータ読み取り可能な記録媒体
Document Type and Number:
Japanese Patent JP4072224
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce the number of pulses between a telephoto end and a wide end in zooming to make speed higher and to follow a cam locus without causing blurring by obtaining a focusing position at the telephoto end in some subject distance in the adjustment of telephoto/middle tracking. SOLUTION: The position of a variator lens 102 on an optical axis is set to a zoom position equivalent to the vicinity of the top of a peak in the locus of a focus lens 105, and the lens 105 is moved by a focus motor 121 so as to perform focusing. At the time of confirming the focusing, the lens 105 is lowered based on a designed value and the lens 102 is driven to a telephoto side, simultaneously, whether or not a focusing state is attained is judged. When the movement of the lens 102 is completed and the focusing is realized at such a position, the position of the variator is equivalent to the position of the variator at the telephoto end. The position of a zoom encoder in such a state is stored as a value to regulate the position at the telephoto end.
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Inventors:
Taeko Tanaka
Application Number:
JP22344197A
Publication Date:
April 09, 2008
Filing Date:
August 20, 1997
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/08; H04N5/232
Domestic Patent References:
| JP9043483A | ||||
| JP8220414A | ||||
| JP7154667A | ||||
| JP5281456A |
Attorney, Agent or Firm:
Takayoshi Kokubun