Eyeglass Frame Shape Measurement Device
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Solution Overview
Problem
Existing eyeglass frame shape measurement devices face challenges in acquiring accurate shape information due to distortion in reflected light flux, inadequate light irradiation, and weak light quantity, leading to difficulties in measuring the rim shape effectively.
Innovation Solution
An eyeglass frame shape measurement device with an optical measurement unit that emits a measurement light flux and a probe unit to detect the rim shape, integrated with a controller to control the movement and data acquisition, allowing for precise measurement of the groove and rim shape by combining optical and contact detection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If optical measurement is used to measure the groove shape, then non-contact measurement is achieved, but measurement precision deteriorates due to light flux distortion and weak reflected light
Solution Approach 1:
The patent combines optical measurement (non-contact) and probe measurement (contact) methods into a single integrated measurement device. The optical measurement unit captures the groove shape without contact, while the probe unit provides precise contact measurement, and both measurement results are integrated to achieve accurate rim shape data.
Solution Approach 2:
The probe unit serves as an intermediary to enhance the optical measurement. When optical measurement precision is insufficient, the probe makes contact with the groove to provide supplementary measurement data, acting as a mediator between the optical system and the actual groove geometry.
2Device complexity
If a single measurement method is used, then device complexity is reduced, but measurement reliability deteriorates due to inability to handle various measurement conditions
Solution Approach 1:
The measurement device is designed with multi-functionality, incorporating both optical measurement capabilities and probe measurement capabilities in a single device. This allows the device to adapt to different measurement conditions and rim types, improving reliability while maintaining reasonable complexity through integrated design.
3Productivity
If optical measurement is used, then measurement speed is improved, but measurement precision deteriorates due to distortion from incident angle changes
Solution Approach 1:
The patent merges optical measurement (fast but less precise under varying angles) with probe measurement (slower but more consistent precision) to achieve both high measurement speed and high precision. The system uses optical measurement for rapid initial assessment and probe measurement for verification and correction.
Solution Approach 2:
The measurement system incorporates feedback mechanisms where the controller compares optical measurement results with probe measurement results, and adjusts subsequent measurements accordingly. This feedback loop ensures that measurement precision is maintained while preserving the speed advantages of optical measurement.
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
The device enables accurate and efficient acquisition of rim shape information, improving the fitting of lenses into eyeglass frames by providing detailed cross-sectional and shape data for lens processing, enhancing the framing process.
Implementation Method 1
a light projecting optical system that emits a measurement light flux from a light source toward a groove of a rim of an eyeglass frame, and a light receiving optical system that causes a first detector to receive a reflected light flux of the measurement light flux emitted toward the groove of the rim of the eyeglass frame by the light projecting optical system and reflected by the groove of the rim of the eyeglass frame
Data Source
AI summary
An eyeglass frame shape measurement device includes an optical measurement unit, a probe unit, a holding unit that holds the optical measurement unit and the probe unit, a changing portion that integrally moves the optical measurement unit and the probe unit with respect to an eyeglass frame to change a measurement position with respect to a groove of a rim of the eyeglass frame, and a controller that controls an operation of the eyeglass frame shape measurement device. The controller controls an operation of the changing portion to measure the groove of the rim of the eyeglass frame, acquires a cross-sectional shape of the groove of the rim of the eyeglass frame based on a detection result detected by the optical measurement unit, and acquires a shape of the rim of the eyeglass frame based on a detection result detected by the probe unit.