Camera Zoom Detection Structure for Accurate Pickup State Sensing
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Solution Overview
Problem
Existing optical apparatuses with retracting mechanisms face issues in accurately distinguishing between capturable and capturing-restricted states, leading to potential misinterpretation of the image pickup state, which can disrupt continuous capturing or affect captured images.
Innovation Solution
An optical apparatus with a rotating member, a protruding member, and a detection unit that provides distinct output changes based on the position of the rotating member's regions, ensuring accurate detection of the image pickup state through a zoom detection unit with varying output rates in different operational states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single detection device is used to detect the position of the rotating member, then the device complexity is reduced, but the measurement precision deteriorates because it cannot accurately distinguish between different operational states (capturable vs. capturing-restricted)
Solution Approach 1:
The rotating member is divided into three distinct regions (first, second, and third regions) with different surface characteristics. The detection device detects outputs from multiple regions separately and synthesizes them to generate the final output signal. This segmentation allows the single detection device to achieve accurate state distinction by analyzing different output patterns from different regions, resolving the contradiction between device simplicity and measurement precision.
2Device complexity
If the detection device output changes uniformly across all positions, then the device complexity is reduced, but the reliability deteriorates because erroneous transitions between states may occur
Solution Approach 1:
Different regions of the rotating member are designed with different local qualities - specifically, different surface characteristics that produce different output signals when detected. The first region, second region, and third region each have distinct detection characteristics. This local quality differentiation ensures that the detection device can reliably distinguish between capturable and capturing-restricted states by analyzing the specific output patterns from each region, preventing erroneous transitions while maintaining controlled device complexity.
Data Source
AI summary
Provided is an optical apparatus comprising: a rotating member configured to allow an optical element to be moved in a direction along an optical axis; a protruding member configured to urge the rotating member in a direction different from a rotating direction of the rotating member; and a detection unit, wherein the rotating member includes a first region, a second region, and a third region set between the first region and the second region in the rotating direction, wherein the rotating member is subjected to a force in the rotating direction when being urged by the protruding member in the third region, and wherein a changing rate of an output of the detection unit is different for each of a first state in which the first region is opposed to the protruding member and a second state in which the second region is opposed to the protruding member.