US5150144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens driving device
Assignee: Pentax Corp
•
Filing: 1991-02-14
•
Granted: 1992-09-22
•
Expires: 2011-02-14
Abstract
Abstract A device for driving a lens including one or more lens groups displaceable in a direction along the optical axis by an electric drive unit. A memory unit is provided for storing a position of the lens group, and a controller for displacing one or more lens groups to the position stored in the memory unit by the electric drive unit.
Inventors
- 👤 Isao Soshi
- 👤 Tatsuhide Takebayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:43
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B7/102
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A device for driving a power zoom lens including one or more lens groups displaceable in a direction along the optical axis by means of an electric drive unit comprising: memory means for storing a focal length position of said lens group; control means for displacing said one or more lens groups to said focal length position stored in said memory means by means of said electric drive unit, for controllable zooming thereof; and, operation means for actuating said memory means to store a current focal length and for causing said control means to perform said controllable zooming to said focal length stored in said memory means, wherein said operation means comprises a pair of switches whereby, when both switches are concurrently actuated in the ON position, said memory means memorizes a focal length, and, when only one of said switches is actuated ON, said control means performs said controllable zooming so as to drive said electric drive unit to said focal length memorized in said memory means.
Claim 2
Independent Claim
168 words
A device for driving a power zoom lens including one or more lens groups displaceable in a direction along the optical axis by means of an electric drive unit comprising: memory means for storing a focal length position of said lens group; control means for displacing said one or more lens groups to said focal length position stored in said memory means by means of said electric drive unit, for controllable zooming thereof; and, operation means for actuating said memory means to store a current focal length and for causing said control means to perform said controllable zooming to said focal length stored in said memory means, wherein said operation means comprises a pair of switches whereby, when both switches are concurrently actuated in the ON position, said memory means memorizes a focal length, and, when only one of said switches is actuated ON, said control means performs said controllable zooming so as to drive said electric drive unit to said focal length memorized in said memory means.
Claim 3
Dependent Claim
24 words
The device according to claim 1, further comprising a preset operation means for storing a current focal length in said focal length memory unit.
Claim 4
Dependent Claim
33 words
The device according to claim 2 further comprising a set operation means for causing said control means to perform said controllable zooming to said focal length stored in said focal length memory unit.
Claim 5
Dependent Claim
46 words
The device according to claim 1, wherein said power zoom lens includes at least two lens groups adapted to be driven by said electric drive unit in a direction along said optical axis while varying distance therebetween and means for detecting positions of said lens groups.
Claim 6
Dependent Claim
22 words
The device according to claim 1 further comprising a detecting means which detects a position of said one or more lens groups.
Claim 7
Dependent Claim
16 words
The device according to claim 1, wherein said lens is detachably mounted to a camera body.
Claim 8
Dependent Claim
27 words
The device according to claim 6, wherein said lens includes said electric drive device, and wherein said camera body includes said memory unit and said control means.
Claim 9
Dependent Claim
18 words
The device according to claim 1, wherein said power zoom lens is detachably mounted to a camera body.
Claim 10
Dependent Claim
34 words
The device according to claim 8, wherein said power zoom lens includes an electric drive device, and wherein said camera body includes said focal length memory unit, said control means and said operation means.
Claim 11
Dependent Claim
66 words
The device according to claim 1, wherein said lens includes a focusing lens group to be driven by said electric drive unit, wherein said memory means is a memory unit for memorizing position of said focusing lens group, and wherein said control means is adapted to drive said electric drive unit so as to move said lens group to said position memorized in said memory means.
References Cited (Backward Citations)
GB1532576A
Cited
US4299457A
Cited
US4465352A
Cited
WO1987007036A1
Cited
US4936664A
Cited
US4885600A
Cited
US4866468A
Cited
US4933700A
Cited
US4994843A
Cited
GB2233777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-22 | 1996-03-23 | 1996-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-22 | 2000-03-23 | 2000-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-22 | 2004-03-23 | 2004-09-22 | $7700.00 | Window Closed / Lapsed |