Lens Controller Aperture Timing for Continuous Capture Speed
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Solution Overview
Problem
Existing camera systems face limitations in continuous capturing speed due to the inability to handle high shutter speeds and the inability to drive the diaphragm unit in the aperture widening direction, leading to restricted capturing capabilities.
Innovation Solution
A lens apparatus with a diaphragm unit and a driver, controlled by a lens controller that communicates with the image pickup apparatus to send necessary time information for aperture driving instructions, allowing for accelerated aperture control and improved continuous capturing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system waits for light-quantity stabilization period after diaphragm unit is stopped, then exposure accuracy is improved, but continuous capturing speed deteriorates
Solution Approach 1:
The lens controller sends time information for aperture driving instructions during the driving period itself, rather than waiting until the diaphragm unit stops. This preliminary action allows the image pickup apparatus to prepare for the next operation in advance, eliminating the need to wait for stabilization period and thereby improving continuous capturing speed while maintaining exposure accuracy
2Productivity
If the shutter speed is high in comparison with light-quantity stabilization period, then capturing speed is improved, but the prior art cannot handle this case properly
Solution Approach 1:
The system dynamically adjusts the timing of sending aperture driving instructions based on the relationship between shutter speed and light-quantity stabilization period. When shutter speed is high, the lens controller sends time information during the driving period, allowing the system to handle high-speed capturing scenarios that were previously incompatible
3Productivity
If the diaphragm unit is driven only in aperture narrowing direction, then system complexity is reduced, but continuous capturing speed is limited
Solution Approach 1:
The lens controller is designed to send aperture driving instructions in both aperture narrowing and widening directions by providing time information during the driving period. This universal approach enables the diaphragm unit to be controlled bidirectionally, improving continuous capturing speed without significantly increasing system complexity
Data Source
AI summary
A lens apparatus attached to and detached from an image pickup apparatus includes a diaphragm unit, a driver configured to drive the diaphragm unit, and a lens controller configured to communicate with the image pickup apparatus to which the lens apparatus is attached, and to control the driver based on aperture driving instruction information or aperture stop time request received from the image pickup apparatus. The lens controller is configured to send to the image pickup apparatus time information necessary to drive the diaphragm unit according to the aperture driving instruction information or aperture stop time request, during a period that starts when the driver starts driving the diaphragm unit and ends when the driver stops driving the diaphragm unit.