Title:
光学装置および撮影システム
Document Type and Number:
Japanese Patent JP4407982
Kind Code:
B2
Abstract:
An optical apparatus includes a first movable optical member, a second movable optical member, different from the first optical member, and a driving mechanism engaged with the second optical member, and operable in a first operation mode, in which the second optical member is movable by an electrical driving operation of the driving mechanism, and a second operation mode, in which the second optical member is movable by a manual driving operation. Operation of the driving mechanism is switched between the first operation mode and the second operation mode by control means such as a CPU, wherein, when the driving mechanism is operable in the second operation mode, the control means switches operation of the driving mechanism to the first operation mode in response to a driving operation of the first optical member. In one embodiment, the optical apparatus is a zoom lens apparatus, the first movable optical member is a focus lens unit, and the second movable optical member is a zoom element, where the control means switches operation of the driving mechanism from the second operation mode, in which the zoom element is movable by a manual driving operation to compensate for a variation in angle of view due to a driving operation of the focus lens unit, to the first operation mode, in which the zoom element is movable by an electrical driving operation. The driving mechanism may include a clutch for selectively transmitting a driving force between an electric drive source and the second optical member, where the control means switches the driving mechanism from the second operation mode to the first operation mode by switching the clutch from a disconnected state to a connected state.
Inventors:
Demura Ken
Application Number:
JP21798399A
Publication Date:
February 03, 2010
Filing Date:
July 30, 1999
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/04; G02B7/10
Domestic Patent References:
| JP5119249A | ||||
| JP10282396A | ||||
| JP11160611A | ||||
| JP9304679A | ||||
| JP11149102A | ||||
| JP62040407A | ||||
| JP61098310A | ||||
| JP1094311A | ||||
| JP6289273A |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Atsushi Mizumoto