Unlock instant, AI-driven research and patent intelligence for your innovation.

Lens holder to compensate for optical focal shift by thermo-mechanical expansion

A focus offset and holder technology, applied in the field of lens holders, can solve the problems of increasing design complexity, manufacturing difficulty, cost and reliability risk

Active Publication Date: 2020-10-09
APPLE INC
View PDF17 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such OIS mechanisms may increase design complexity, manufacturing difficulty, cost and reliability risk

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lens holder to compensate for optical focal shift by thermo-mechanical expansion
  • Lens holder to compensate for optical focal shift by thermo-mechanical expansion
  • Lens holder to compensate for optical focal shift by thermo-mechanical expansion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Introduction

[0023] This disclosure describes the design of cameras for mobile devices, such as fixed focus rear-facing cameras, where the mechanical design is developed around the image sensor and optics to provide "athermal difference". In other words, the function of the mechanical design of the package is to compensate for the focus shift of the optics with respect to temperature. The paper further describes the mechanical design, including aspects such as architecture, geometry, and material properties. The mechanical design corresponds to a two-body design where the lens holder has a coefficient of thermal expansion (CTE) designed to thermomechanically compensate, through thermal expansion, the optical focus shift with respect to temperature associated with a particular optical design.

[0024] The double body design of the present disclosure may provide several design advantages over other fixed focus assembly concepts such as threaded lens designs or single b...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
elastic modulusaaaaaaaaaa
elastic modulusaaaaaaaaaa
Login to View More

Abstract

The invention relates to a lens holder to compensate for optical focal shift by thermo-mechanical expansion. The invention discloses a camera module, including a lens assembly, a lens holder, and an image sensor assembly. The lens assembly includes a lens barrel and multiple lens elements embedded within the lens barrel. A change of temperature causes an optical focal shift that is determined according to an optical thermal shift rate associated with an optical design of the lens assembly. The lens holder has a lens holder CTE to compensate for the optical focal shift by thermo-mechanical expansion. The change of temperature causes a length expansion of the lens holder determined at least in part according to the lens holder CTE. The image sensor assembly includes an image sensor and a substrate coupled to the image sensor, the image sensor to capture light passing through the multiple lens elements and convert the captured light into image signals. The lens holder is attached to the lens barrel and the substrate using adhesives.

Description

technical field [0001] This patent application claims the benefit of priority to U.S. Patent Application Serial No. 62 / 826,673, filed March 29, 2019, which is incorporated herein by reference in its entirety. [0002] The present disclosure relates generally to lens holders for lens assemblies and, more particularly, to lens holders that compensate for optical focus shift through thermomechanical expansion. Background technique [0003] The advent of small mobile multipurpose devices such as smartphones and tablet computers or tablet devices has led to the need for high resolution small form factor cameras integrated in the devices. Temperature changes can cause thermal expansion / contraction, which can cause optical focus to shift. Some small form factor cameras may incorporate optical image stabilization (OIS) mechanisms (including actuators) to compensate for shifts in optical focus with respect to temperature. Such OIS mechanisms may increase design complexity, manufact...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/225
CPCH04N23/54H04N23/57H04N23/55G02B7/008G02B7/028G02B7/021G02B7/025G03B17/06G03B17/08G03B17/12
Inventor A·R·胡波特C·N·达尔维J·福塞思R·R·泰西尔雷斯
Owner APPLE INC