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US 5,708,870 AGranted
Optical apparatus
AssigneeCanon Kabushiki Kaisha
InventorsJun Sugita, Naoya Kaneda, Mitsuo Niida
Life of this patent
Estimating the term…
Abstract
An optical apparatus comprises a zoom lens for effecting magnification change, a focusing lens for effecting focus adjustment, a first motor for moving the focusing lens, a second motor for moving the zoom lens, and detecting mechanism for detecting the reference positions of the focusing lens and the zoom lens, the detecting mechanism being used in common to the two lenses.
Claims39
An optical apparatus comprising:
- a zoom lens for effecting magnification change;
- a focusing lens for effecting at least focus adjustment;
- a first motor for moving said focusing lens;
- a second motor for moving said zoom lens;
- and
- a single detecting means for detecting reference positions of both said focusing lens and said zoom lens, said detecting means being used in common with both said focusing lens and said zoom lens.
3 more elements
An optical apparatus comprising:
- a zoom lens for effecting magnification change;
- a focusing lens for effecting at least focus adjustment;
- a first motor for moving said focusing lens;
- a second motor for moving said zoom lens;
- and
- detecting means having at least one output line providing a signal indicative of detection thereby, said output line providing signals separately indicative of reference positions of both said focusing lens and said zoom lens.
3 more elements
A movement control apparatus comprising:
- a single detection switch which converts moving states of a first movable member and also a second movable member which moves independently from said first movable member into signals, said single detection switch performing an operation for converting the moving state of the first movable member into the signal and an operation for converting the moving state of the second movable member into the signal, to perform with different timing from each other;
- and
- a control device which controls the movement of said first and second movable members on the basis of the signal detected by said single detection switch.
A position detection apparatus comprising:
- a single detection switch which converts positions of a first movable member and also a second movable member which moves independently of said first movable member into signals, said single detection switch performing an operation for converting the position of the first movable member into the signal and an operation for converting the position of the second movable member into the signal, to perform with different timing from each other;
- and
- a control device which controls the movement of said first and second movable members on the basis of the signal detected by said single detection switch.
A position detection apparatus comprising:
- a single detection switch which converts positions of a first movable member and also a second movable member which moves independently of the first movable member into signals and for outputting the signals, said single detection switch performing an operation for converting the position of the first movable member into the signal and an operation for converting the position of the second movable member into the signal, to perform with different timing from each other;
- and
- a control device which controls the movement of said first and second movable members on the basis of the signal detected by said single detection switch.
An optical apparatus comprising:
- a single detection switch which converts moving states of a first movable member and also a second movable member which moves independently of said first member into signals, said single detection switch performing an operation for converting the moving state of the first movable member into the signal and an operation for converting the moving state of the second movable member into the signal, to perform with different timing from each other;
- and
- a control device which controls the movement of said first and second movable members on the basis of the signal detected by said single detection switch.
An optical apparatus comprising:
- a single detection switch which converts positions of a first movable member and also a second movable member which moves independently of said first member into signals, said single detection switch performing an operation for converting the position of the first movable member into the signal and an operation for converting the position of the second movable member into the signal, to perform with different timing from each other;
- and
- a control device which controls the movement of said first and second movable members on the basis of the signal detected by said single detection switch.
An optical apparatus comprising:
- a single detection switch which converts positions of a first movable member and also a second movable member which moves independently of said first member into signals and for outputting the signals, said single detection switch performing an operation for converting the position of the first movable member into the signal and an operation for converting the position of the second movable member into the signal, to perform with different timing from each other;
- and
- a control device which controls the movement of said first and second movable members on the basis of the signal detected by said single detection switch.
Dependencies are inferred from the claim text.