Low Z-height Camera Module with Aspherical Shape Blue Glass

• US 20160109783A1
• Filed: 10/20/2014
• Published: 04/21/2016
• Est. Priority Date: 10/20/2014
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Google Inc. (Alphabet Inc.)
• Inventors: Chen, Xi, Gao, Lu
• Granted Patent: US 9,851,619 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 7/025 using glue
• CPC Class Codes: G03B 11/00 Filters or other obturators specially adapted for photographic purposes
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

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.

Claims

1. 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; 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.

2. The device of claim 1, further comprising a circuit configured to receive detection data from the sensor and send it to a processor.

3. The device of claim of claim 1, wherein the sensor is disposed adjacent to a second surface of the blue glass infrared cutoff filter opposite the first surface.

4. The device of claim 1, wherein the blue glass infrared cutoff filter is glued to the sensor.

5. The device of claim 1, wherein the blue glass infrared cutoff filter is disposed inside the lens barrel.

6. The device of claim 1, wherein a mold for the aspheric epoxy surface is aligned to the blue glass infrared cutoff filter prior to disposing the aspheric epoxy surface on the first surface of the blue glass infrared cutoff filter.

7. The device of claim 1, wherein the lens barrel is aligned to the sensor.

8. The device of claim 1, wherein the lens barrel is aligned to the sensor is within a tolerance of not more than 10 μ

m.

9. 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;

aligning the infrared cutoff filter to a sensor;

attaching the sensor to a circuit board;

aligning a lens holder to the sensor; and

focusing at least one lens in a lens barrel.

10. The method of claim of claim 9, further comprising disposing the sensor adjacent to a second surface of the blue glass infrared cutoff filter opposite the first surface.

11. The method of claim 9, further comprising affixing the blue glass infrared cutoff filter to the sensor.

12. The method of claim 9, further comprising disposing the blue glass infrared cutoff filter inside the lens barrel.

13. The method of claim 9, further comprising aligning the aspheric mold to the blue glass infrared cutoff filter.

14. The method of claim 9, further comprising aligning the lens barrel to the sensor.

15. The method of claim 14, wherein the lens barrel is aligned to the sensor is within a tolerance of not more than 10 μ

m.

16. A filter system comprising an aspheric epoxy surface disposed on a blue glass infrared cutoff filter, wherein the blue glass infrared cutoff filter is disposed between a sensor and at least one lens.