Low z-height camera module with aspherical shape blue glass
AssigneeGoogle Inc.
InventorsXi Chen, Lu Gao
Life of this patent
Estimating the term…
Abstract
A blue glass infrared cutoff filter is disclosed that contains an aspheric epoxy replicated on a first surface of the infrared cutoff filter. The aspheric epoxy and blue glass infrared cutoff filter may be a component of a camera device that includes a lens barrel with one or more lenses disposed therein. The camera device may include a sensor for detecting light received by the camera device. The sensor may be connected to circuitry that dispatches the detection data generated by the sensor to a processor of a device into which the camera device has been incorporated.
Claims19
A camera device, comprising:
- a lens barrel;
- at least one lens disposed inside the lens barrel;
- a blue glass infrared cutoff filter;
- an aspheric epoxy surface disposed on a first surface of the blue glass infrared cutoff filter, wherein the aspheric epoxy surface has two convex portions with a valley between the two convex portions on only a front surface of the aspheric epoxy surface;
- and
- a sensor disposed to receive light transmitted through the at least one lens disposed inside the lens barrel and the blue glass infrared cutoff filter, the sensor disposed in direct physical contact with a second surface of the blue glass infrared cutoff filter, the second surface opposite of the first surface,
- wherein the device is configured to produce a modulation transfer function with a value greater than 0.4 for a field of view less than 35 degrees.
A method of fabricating a camera device, comprising:
- replicating epoxy from an aspheric mold on a first surface of a blue glass infrared cutoff filter, wherein a shape of the aspheric mold replicates the epoxy to have two convex portions with a valley between the two convex portions on only a front surface of the epoxy;
- disposing a second surface of the blue glass infrared cutoff filter to have a direct physical contact with a sensor, the second surface opposite of the first surface;
- attaching the sensor to a circuit board;
- aligning a lens holder to the sensor;
- and
- focusing at least one lens in a lens barrel,
- wherein the camera device is configured to produce a modulation transfer function with a value greater than 0.4 for a field of view less than 35 degrees.
Dependencies are inferred from the claim text.