Interchangeable Lens Data Integrity Verification

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional interchangeable lens systems face issues in properly controlling driven members due to damage in stored information caused by strong electric impacts, leading to inaccurate aperture drive times.

Innovation Solution

The system includes a mount unit, a driven member, a drive unit, a storage unit for lens data, and a transmitter that sends judgment data to the camera body to assess the integrity of the stored lens data, allowing for precise control of the driven member's operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If lens data is stored in the storage unit for aperture drive control, then aperture drive time can be calculated, but the stored information may be damaged by strong electric impacts leading to improper control

Engineering Contradiction:

Improveaperture drive time calculationVSAvoidintegrity of stored lens data

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system performs preliminary verification of lens data integrity by the camera body before using the stored data for aperture drive control. The camera body reads the lens data from the storage unit and verifies its validity, preventing use of damaged information that could cause improper aperture control.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements a feedback mechanism where the camera body sends verification results back to determine whether the lens data can be safely used. This feedback loop ensures that damaged data is detected and prevents improper aperture drive control while maintaining the ability to calculate aperture drive time when data is valid.

Inventive Principle:

Principle #23Feedback

2Reliability

If the camera body verifies lens data integrity, then reliable aperture control is achieved, but additional verification steps increase operation time

Engineering Contradiction:

Improveaperture control accuracyVSAvoiddata verification time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The verification process performs only essential checks to determine data usability without exhaustive validation. This partial verification approach achieves sufficient reliability for aperture control while minimizing the time penalty compared to complete verification.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS11233930B2Interchangeable lens and camera body

Publication Date: 2022.01.25 NIKON CORP

AI summary

An interchangeable lens includes: a mount on which a camera body can be mounted; a communication device that performs communication with the camera body; a driven member; a controller that controls the driven member; and a storage device that stores lens data related to control of the driven member by the controller. The controller sends to the camera body via the communication device lens-side judgment data based on the lens data and a parameter relating to the driven member received from the camera body via the communication device and based on which whether the lens data is considered to be properly stored in the storage device or not can be judged at the camera body.