Imaging Element Unit with Localized UV-Transmissive Optical Member
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Solution Overview
Problem
Existing imaging apparatuses face challenges in effectively correcting camera shake and managing dust accumulation, particularly in lens-integrated cameras where direct access and cleaning are limited, leading to potential image quality issues.
Innovation Solution
The implementation of an imaging element unit with a piezoelectric vibration applying device fixed to an IR cut glass optical member using ultraviolet curable adhesive, allowing for dust removal and a compact, high-accuracy shake correction mechanism through a vibration applying device and a shake correction device with a movable unit and fixed unit configuration, including dustproof and dust adsorption members to prevent dust reflection in the image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a vibration applying device is attached to an optical member, then dust removal function is improved, but attachment reliability deteriorates due to vibration and acceleration forces
Solution Approach 1:
The optical member is designed with different surface characteristics in different regions: the first region (where the vibration applying device is attached) has lower UV cutting rate to allow adhesive curing, while the second region has higher UV cutting rate for optimal optical performance. This local differentiation enables reliable attachment without compromising overall optical quality.
Solution Approach 2:
An UV curable adhesive is introduced as an intermediary between the vibration applying device and the optical member. The adhesive utilizes the UV light transmitted through the first region to cure and form a reliable bond, mediating the attachment while allowing the optical member to maintain its structural integrity during vibration and acceleration.
2Reliability
If UV curable adhesive is used for attachment, then attachment reliability is improved, but manufacturing complexity increases due to UV irradiation requirement
Solution Approach 1:
The optical member serves multiple functions: it transmits UV light for adhesive curing in the first region, maintains optimal optical characteristics in the second region, and provides the structural platform for attaching the vibration applying device. This multi-functionality reduces the need for separate components and simplifies the overall structure.
Solution Approach 2:
The UV cutting rate parameter of the optical member is varied spatially to create distinct functional zones. By controlling the UV transmission characteristics differentially across the member surface, the design enables selective adhesive curing without requiring complex external UV irradiation systems, thus reducing manufacturing complexity.
3Ease of manufacture
If the optical member transmits UV rays for adhesive curing, then attachment is enabled, but optical performance in the first region deteriorates
Solution Approach 1:
The optical member is designed with spatially varying UV cutting rates: the first region has lower UV cutting rate to enable adhesive curing, while the second region has higher UV cutting rate for optimal optical performance. This local differentiation allows the system to optimize for different functions in different locations without compromise.
Solution Approach 2:
The optical member is segmented into functionally distinct regions: a first region optimized for UV transmission to support attachment operations, and a second region optimized for optical performance. This segmentation allows each region to be independently optimized for its specific purpose while working together as an integrated component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables effective dust removal and shake correction, reducing the size and complexity of the imaging apparatus while maintaining high image quality and preventing dust from affecting the image, specifically in lens-integrated cameras.
Implementation Method 1
the vibration applying device is a piezoelectric element
Implementation Method 2
the vibration applying device is fixed to the first surface by irradiating an ultraviolet curable adhesive applied between the first surface and the vibration applying device with ultraviolet rays through the first region
Implementation Method 3
the optical member is a glass member that cuts infrared light
Data Source
AI summary
An imaging element unit according to an aspect of the present invention includes an imaging element; an optical member that is disposed on an imaging surface side of the imaging element; and a vibration applying device that is disposed on a first surface of the optical member, in which a second surface of the optical member opposite to the first surface has a first region including a region overlapping with the vibration applying device in a case of being seen through in an optical axis direction of the imaging element, and a second region that is a region other than the first region, and the first region and the second region have different surface characteristics. In the imaging element unit of such an aspect, it is preferable that the vibration applying device is fixed to the first surface by utilizing a difference in the surface characteristi