Worn-State Glasses Measurement With Pantoscopic Angle Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lensmeters fail to account for changes in temple width, pantoscopic angle, and other deformations when glasses are worn, leading to suboptimal vision conditions for the wearer.
Innovation Solution
A glasses measurement apparatus that includes a supporting portion to hold glasses at multiple positions, a measuring portion to measure optical properties, and an adjusting portion to replicate the wearing state by adjusting temple width and pantoscopic angle, allowing accurate measurement of lens properties in a worn state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If glasses are measured in a fixed state without adjustment, then measurement process is simple, but measurement precision is insufficient because it does not reflect actual wearing conditions
Solution Approach 1:
The measurement apparatus employs adjustable temple portions that can be dynamically modified to match different head widths, and an adjustable pantoscopic angle mechanism that replicates the glasses' tilted position on the face. This dynamic adjustment capability allows the device to transition from a static measurement setup to one that accurately simulates real wearing conditions, thereby improving measurement precision without requiring complete device replacement
Solution Approach 2:
The apparatus creates a simplified copy of the actual wearing state by using adjustable components that replicate the deformation and angular position of glasses on a wearer's face. The temple portions can be adjusted to mimic the grip and deformation caused by head width variations, and the pantoscopic angle adjustment copies the forward tilt angle, enabling accurate optical property measurement without needing an actual human subject
2Measurement precision
If temple width and pantoscopic angle are adjusted to match wearing state, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The measurement apparatus is divided into distinct functional modules: a supporting portion that holds the glasses, a temple adjusting mechanism that independently modifies temple width, and a pantoscopic angle adjusting mechanism that separately controls the tilt angle. This segmentation allows each component to be adjusted independently and calibrated separately, simplifying the overall system complexity while achieving accurate replication of wearing conditions
Solution Approach 2:
The apparatus enables independent adjustment of key geometric parameters including temple width, pantoscopic angle, and vertex distance. By allowing these parameters to be changed to match specific wearing conditions, the system achieves high measurement precision while maintaining operational simplicity through straightforward mechanical adjustments rather than complex automated systems
3Reliability
If multiple adjustment mechanisms are added to replicate wearing state, then measurement reliability improves, but ease of operation decreases
Solution Approach 1:
The apparatus includes pre-configured adjustment ranges and guide mechanisms that anticipate the required temple width and pantoscopic angle settings based on common wearing conditions. The supporting portion is designed with pre-established adjustment positions that correspond to typical facial geometries, allowing operators to quickly select appropriate settings without complex calculations or trial-and-error adjustments, thus maintaining ease of operation while ensuring reliable measurements
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
Enables precise measurement of lens properties considering the actual wearing state, ensuring optimal vision correction for the wearer by replicating temple width and angle adjustments.
Implementation Method 1
The lens measuring portion projects measurement light to a lens, causes a light receiving element to receive measurement light transmitted through the lens, and measures optical properties (for example, refractive power or the like) of the lens
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A glasses measurement apparatus measures optical properties of a lens of glasses. The glasses measurement apparatus includes an adjusting portion for adjusting at least one of deformation of the glasses and a pantoscopic angle of the glasses to reproduce a wearing state of the glasses when the glasses are worn by a wearer, and a lens measuring portion for measuring the optical properties of the lens of the glasses having the wearing state reproduced by the adjusting portion. The adjusting portion includes a pantoscopic angle adjusting portion for changing the pantoscopic angle by moving at least one position of a position of a front region of the glasses and a position of a rear region of the glasses in an up-down direction.