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Detection of Alignment Loss in Optical Imaging Modules

An optical image and detector technology, applied in photovoltaic modules, testing optical performance, optics, etc., can solve problems such as offset

Active Publication Date: 2022-04-12
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the imaging optics and image sensor are carefully aligned during manufacture, the alignment can actually shift during the lifetime of the module due to mechanical shock

Method used

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  • Detection of Alignment Loss in Optical Imaging Modules
  • Detection of Alignment Loss in Optical Imaging Modules
  • Detection of Alignment Loss in Optical Imaging Modules

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Experimental program
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Embodiment approach

[0049] Figure 5 is a schematic cross-sectional view of an optoelectronic device 55 according to another embodiment of the present invention. In this and subsequent embodiments, the beam from the VCSEL 12 is internally reflected four or more times within the microprism lens, thereby increasing the optical path length and thus the diameter of the beam projected out of the device.

[0050] Optoelectronic device 55 includes the following items similar to those of device 21 and are labeled with the same references: planar semiconductor substrate 10 , VCSEL 12 and gold layer 16 . As in device 21 , VCSEL 12 emits light beam 14 in a vertical direction relative to substrate 10 . Microprism lenses 60 are formed over the VCSEL 12 . As in device 21 , microprismatic lens 60 comprises a material that is transparent at the wavelength of light beam 14 .

[0051] The first section 62 of the surface 64 of the microprismatic lens 60 includes a first subsection 62a and a second subsection 62b...

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PUM

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Abstract

The present disclosure relates to detecting alignment loss of an optical imaging module. Disclosed herein is an imaging device comprising a housing, wherein imaging optics are mounted in the housing and configured to form an optical image of an object located outside the housing at a focal plane within the housing. An image sensor comprising a matrix of detector elements is positioned at the focal plane, aligned with the imaging optics, and configured to output an electronic image signal in response to optical radiation incident on the detector elements. At least one emitter is secured within the housing and configured to emit the test beam toward one or more reflective surfaces within the housing that reflect the test beam toward the image sensor. The processor is configured to process electronic image signals output by the image sensor in response to the reflected test beam to detect changes in alignment of the image sensor with the imaging optics.

Description

technical field [0001] The present invention relates generally to optoelectronic devices and, in particular, to beamforming optics for optical emitters and applications of such emitters. Background technique [0002] Optical emitters, such as vertical-cavity surface-emitting lasers (VCSELs), are often integrated with small lenses, called microlenses, that direct and collimate the emitted beam. An array of such microlenses can be fabricated integrally over a semiconductor substrate on which an array of emitters is formed, with the microlenses aligned with the emitters. [0003] Compact optical imaging modules are ubiquitous in portable digital devices, such as in mobile phones and tablet computers. A typical module includes imaging optics, which include one or more lenses, and an image sensor located in the image plane of the optics. Even if the imaging optics and image sensor are carefully aligned during manufacture, the alignment can actually shift during the lifetime of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02H04N5/225H04N17/00
CPCG01M11/02H04N17/002H04N23/50H04N23/51H04N23/55H04N23/54H04N23/80H04N25/67H01L27/14625H02S50/15G02B13/16G02B3/08G02B7/021Y02E10/50H04N23/57H01L27/14605H01L27/14627G02B5/04H01S5/0071G02B5/0858H01S5/0225H04N25/63
Inventor A·亚伯拉罕R·D·帕杰拉R·雷米兹
Owner APPLE INC