Dual-Front-Group Optical System for Stereo Crosstalk Control
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Solution Overview
Problem
Existing image pickup apparatuses struggle to capture stereoscopic images with sufficient parallax and suppress crosstalk while maintaining a compact size and high image quality.
Innovation Solution
An optical system with two front groups arranged perpendicular to the optical axis, a common rear group, and two aperture stops, guiding principal rays to an image plane intersection, with specific inequalities to control ray angles and suppress crosstalk, and a detachable mountable design with communication for signal correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common rear group is used for both front groups, then device complexity is reduced, but manufacturing precision and alignment accuracy become more difficult to control
Solution Approach 1:
The optical system is divided into independent front groups (first front group and second front group) that can be manufactured and aligned separately, then combined with a common rear group. This segmentation allows each front group to be optimized independently while sharing the common rear group, reducing overall complexity while maintaining precision through modular assembly
Solution Approach 2:
The rear group is designed as a universal component that serves both the first front group and the second front group. This multi-functional design reduces the total number of optical elements and simplifies the overall system structure, while the common aperture stop provides unified control for both imaging paths
2Object-generated harmful factors
If aperture stops are disposed between front groups and rear group, then crosstalk is suppressed, but system size increases
Solution Approach 1:
Aperture stops are introduced as intermediary elements between the front groups and rear group to control and suppress crosstalk. The first aperture stop and second aperture stop act as mediators that selectively allow light from each front group to pass through to the common rear group, preventing unwanted light mixing while maintaining a compact overall structure
3Manufacturing precision
If principal rays are guided to optical axis intersection, then image quality is improved, but device complexity increases
Solution Approach 1:
The optical system uses parameter changes in the arrangement of front groups (perpendicular to optical axis) and positioning of aperture stops to control ray paths. By adjusting these geometric parameters, principal rays from both front groups are naturally guided to intersect at the optical axis, achieving high image quality without complex active control mechanisms
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
Enables stereoscopic imaging with reduced system size and improved image quality by controlling ray angles and crosstalk, ensuring high signal-to-noise ratio and effective parallax capture.
Implementation Method 1
an optical system with two front groups arranged perpendicular to the optical axis, a common rear group, and two aperture stops, guiding principal rays to an image plane intersection
Implementation Method 2
guiding principal rays to an image plane intersection
Implementation Method 3
a first photoelectric converter and a second photoelectric converter, each of which is configured to photoelectrically convert an image formed by light passing through the first aperture stop and the second aperture stop
Data Source
AI summary
An optical system includes a first front group and a second front group that are arranged in a first direction perpendicular to an optical axis direction, a rear group that is commonly used for the first front group and the second front group, a first aperture stop disposed between the first front group and the rear group, and a second aperture stop disposed between the second front group and the rear group. A first principal ray passing through an aperture center in the first aperture stop and a second principal ray passing through an aperture center in the second aperture stop are guided to an intersection of an optical axis of the rear group and an image plane.