Dual Iris Aperture Gear Drive for Stereo Luminance Uniformity
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Solution Overview
Problem
Existing aperture stop apparatuses for stereo imaging systems face challenges in creating an excellent image degradation shape due to limitations in aperture shape control for each optical system, particularly when using a single driving source to operate multiple aperture blades.
Innovation Solution
An aperture stop apparatus with a single driving source that includes a drive gear, base member, and two rotating members with iris stops for each optical system, allowing for precise control of light amounts through gear engagement and cam mechanisms, enabling fine control of aperture diameters and uniformity between the systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single driving source drives two aperture blades via a driving arm or lever member, then the device complexity is reduced, but the aperture shape control precision deteriorates
Solution Approach 1:
The patent divides the aperture stop control into two independent iris stops, each with its own rotating member and gear portion. This segmentation allows each optical system to have independent aperture shape control while still using a single driving source, resolving the contradiction between device simplicity and control precision.
Solution Approach 2:
Each iris stop is equipped with three or more blade members that can be independently positioned through gear engagement, allowing local optimization of aperture shape for each optical system. This enables excellent bokeh shape control in each aperture stop while maintaining overall system simplicity.
2Quantity of substance
If aperture blades are shared between two optical systems, then the quantity of parts is reduced, but the aperture shape uniformity deteriorates
Solution Approach 1:
The patent segments the aperture control mechanism into two separate iris stops with independent blade members for each optical system. This ensures that each optical system maintains uniform aperture shape characteristics while still using a compact single-driving-source design, preventing cross-contamination of aperture shapes between systems.
Solution Approach 2:
The single driving source is designed to universally drive both rotating members through the drive gear and gear portions, achieving multi-functionality. This allows one driving source to control two independent aperture stops with uniform shapes, reducing part quantity while maintaining aperture shape consistency.
Data Source
AI summary
An aperture stop apparatus configured to control a light amount in each of two optical systems arranged in parallel includes a drive gear, a single driving source configured to drive the drive gear, a base member, two aperture stops as iris stops each having three or more blade members, and two rotating members each including a gear portion engaged with the drive gear. Each aperture stop is operated as a corresponding one of the rotating members rotates. A rotation of a drive gear driven by the driving source is transmitted to the two rotating members through the gear portions provided to the rotating members and engaged with the drive gear.