Dual Optical System Image Pickup Apparatus Focus Adjustment
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Solution Overview
Problem
Conventional stereoscopic observation systems face challenges in achieving accurate and manufacturable parallax images due to differences in focus between optical systems, requiring precise focusing adjustments that can be difficult to achieve and result in peripheral resolution degradation.
Innovation Solution
An image pickup apparatus with two optical systems having different focusing units, where frames holding lenses are movable to adjust the focusing positions, and lenses with specific shapes and arrangements, such as D-cut and planoconcave designs, are used to achieve optimal parallax images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two different optical systems are used to capture images with different parallax, then stereoscopic vision is achieved, but focus differences between the optical systems cause difficulty in manufacturing and peripheral resolution degradation
Solution Approach 1:
The patent divides the optical system into multiple lens groups (first lens group, second lens group, third lens group) that can be independently focused. Each lens group has its own focusing mechanism, allowing separate focus control for different parallax images while maintaining overall system coherence. This segmentation enables independent optimization of focus for each optical path without affecting the entire system.
Solution Approach 2:
The patent implements dynamic focus adjustment mechanisms where lens groups can move along the optical axis to change focus positions. The focusing units enable real-time adjustment of focus differences between the two optical systems, allowing the system to adapt to different shooting distances and maintain optimal focus for stereoscopic vision under varying conditions.
2Measurement precision
If precise focusing adjustments are made to achieve accurate parallax images, then image quality improves, but the complexity of adjustment increases and manufacturability decreases
Solution Approach 1:
By dividing the focusing mechanism into separate focusing units for different lens groups, the patent simplifies the adjustment process. Each focusing unit can be independently calibrated and adjusted, reducing the overall complexity compared to adjusting the entire optical system as a single unit. This modular approach makes manufacturing and quality control more manageable.
Solution Approach 2:
The patent employs focusing mechanisms that change the position parameters of lens groups along the optical axis to achieve focus adjustment. By controlling the movement distance and position of each lens group independently, the system can achieve precise focus for parallax images while maintaining simple adjustment procedures through standardized focusing mechanisms.
3Ease of manufacture
If focus differences between optical systems are not adjusted, then manufacturing becomes easier, but peripheral resolution degrades and stereoscopic vision quality decreases
Solution Approach 1:
The patent incorporates dynamic focusing capabilities that allow the optical system to adapt to different shooting conditions. The focusing units enable the system to maintain high peripheral resolution and stereoscopic vision quality by adjusting focus in real-time, while the standardized focusing mechanisms keep the assembly process relatively simple and manufacturable.
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 configuration allows for easy adjustment of focus differences between optical systems, ensuring favorable stereoscopic vision with appropriate parallax, improving manufacturability and maintaining image quality.
Implementation Method 1
a first optical system and a second optical system which generate two optical images having mutual parallax
Implementation Method 2
the first frame is movable in a direction of optical axes with respect to the third frame, and the second frame is movable in a direction of optical axes with respect to the third frame
Data Source
AI summary
An image pickup apparatus, includes a first optical system and a second optical system which generate two optical images having mutual parallax; and one image sensor which captures the two optical images, wherein each of the first optical system and the second optical system has a different focusing unit, further includes a first frame which holds some of lenses in the first optical system, a second frame which holds the image sensor; and a third frame which holds lenses in the first optical system other than the lenses held by the first frame, and lenses in the second optical system, wherein the first frame is movable in a direction of optical axes with respect to the third frame, and the second frame is movable in a direction of optical axes with respect to the third frame.