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US 2011/0299181 A1Published application
Compact imaging device
AssigneeHong Kong Applied Science and Technology Research Institute Company Limited
InventorsMan Yee Pang, Kin Ming Fan, Kwok Sing Cheng, Sio Kuan Lam
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Abstract
The subject matter disclosed herein relates to an imaging device having a small form factor.
Claims26
An optical apparatus comprising:
- a lens assembly including one or more lenses;
- an image sensor to receive light from said lens assembly;
- an actuator to adjust a position of said lens assembly, said actuator including at least one magnet and at least one coil to produce an electromagnetic force;
- and
- a spring disposed between said at least one magnet and said at least one coil,
- wherein said at least one magnet is disposed on top of said at least one coil along an optical axis of said lens assembly,
- wherein a first portion of said lens assembly is disposed in a central cavity of said actuator and a second portion of said lens assembly is disposed between said central cavity of said actuator and said image sensor,
- wherein said first portion has a smaller radial size relative to an optical axis of said lens assembly than that of said second portion,
- wherein said at least one magnet is attached to said first portion, and
- wherein at least a portion of said actuator is coupled to said image sensor.
7 more elements
A method comprising:
- mounting a lens assembly including one or more lenses to a portion of an actuator that includes at least one magnet and at least one coil to produce an electromagnetic force;
- positioning an image sensor to receive light from said lens assembly;
- and
- mounting said actuator to adjust a position of said lens assembly, said actuator including at least one magnet and at least one coil to produce an electromagnetic force,
- wherein said mounting said lens assembly is performed so that a first portion of said lens assembly is disposed in a central cavity of said actuator and a second portion of said lens assembly is disposed between said central cavity of said actuator and said image sensor, wherein said first portion has a smaller radial size relative to an optical axis of said lens assembly than that of said second portion, and wherein at least a portion of said actuator is coupled on said image sensor.
2 more elements
A method comprising:
- forming an actuator wafer comprising multiple actuators by laminating together:
- a sheet-like array of printed circuit board (PCB) coils;
- a sheet-like array of leaf springs;
- and
- a sheet-like array of magnets;
- cutting said actuator wafer to separate said actuators comprising one of said PCB coils, one of said leaf springs, and one of said magnets;
- coupling said actuators to image sensors;
- and
- mounting lens assemblies to said actuators so that a first portion of said lens assemblies is disposed in a central cavity of said actuators and a second portion of said lens assemblies is disposed between said central cavity of said actuators and said image sensors, wherein said first portion has a smaller radial size relative to an optical axis of said lens assembly than that of said second portion.
6 more elements
An optical apparatus comprising:
- a lens assembly including one or more lenses;
- an image sensor to receive light from said lens assembly;
- an actuator to adjust a position of said lens assembly, said actuator including at least one magnet and at least one coil to produce an electromagnetic force;
- and
- a spring disposed between said at least one magnet and said at least one coil,
- wherein said at least one coil is disposed on top of said at least one magnet along said optical axis,
- wherein a first portion of said lens assembly is disposed in a central cavity of said actuator and a second portion of said lens assembly is disposed between said central cavity of said actuator and said image sensor,
- wherein said first portion has a smaller radial size relative to an optical axis of said lens assembly than that of said second portion,
- wherein at least a portion of said actuator is coupled to said image sensor,
- wherein said coil is attached to said first portion of said lens assembly,
- wherein said spring comprises a first portion that is movable with respect to said image sensor, and a second portion that is fixed with respect to said image sensor,
- wherein said first portion of said spring is attached to said at least one coil, and
- wherein said second portion of said spring is attached to said at least one magnet.
10 more elements
Dependencies are inferred from the claim text.