Lens Blocker Light Transmission Reflection Device
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Solution Overview
Problem
Existing blockers for lens machining face complications in simultaneously detecting the image and measuring characteristics of lenses due to the need for separate positions of image sensors and lens meters, leading to structural complexity and potential measurement errors.
Innovation Solution
A light transmission and reflection device with a first and second rotating cylinder system, allowing the central hole to be blocked or opened for uniform image detection and characteristic measurement, respectively, using a driving mechanism to adjust the position of the second reflection plate and a blocking member to attach a leap block to the lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the image sensor and lens meter are located in the rear area of the lens at the same time, then both image detection and characteristic measurement can be performed simultaneously, but the structure becomes complicated and measurement errors may occur
Solution Approach 1:
The optical path is segmented into two separate paths: one for image detection and another for characteristic measurement. The illumination light is split so that part of it reflects off the retroreflection member to the image sensor, while another part passes through the central hole to the lens meter, allowing both functions to operate simultaneously without structural interference
Solution Approach 2:
A beam splitter is introduced as an intermediary component to divide the illumination light into two separate paths. This mediator enables the retroreflection member to serve dual purposes: providing retroreflection for image detection while allowing transmitted light to reach the lens meter for characteristic measurement
2Measurement precision
If a hole is formed in the center of the retroreflection member for lens meter illumination, then characteristic measurement can be performed, but uniform image detection becomes difficult
Solution Approach 1:
The retroreflection member is segmented into two functional zones: the main body that provides retroreflection for uniform image detection, and the central hole that allows transmitted light for characteristic measurement. This segmentation resolves the conflict between measurement precision and image detection uniformity
Solution Approach 2:
Different parts of the retroreflection member have different optical properties: the main body has high retroreflectivity for uniform image detection, while the central hole has transmission properties for lens meter illumination. This local differentiation of optical quality resolves the contradiction
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 uniform image detection and accurate measurement of lens characteristics by ensuring consistent light reflection and transmission, reducing measurement errors and structural complexity.
Implementation Method 1
a retroreflection member having a rear surface thereof coated with a reflective film
Implementation Method 2
a reflection plate having a central hole formed in a center of the reflection plate
Data Source
Figure 1(A)~1(B)
Figure 2
Figure 3A~4
AI summary
Disclosed is a blocker having a light transmission and reflection device used to detect the image of a lens and to measure the characteristics of the lens. The blocker (10) comprises: an illumination light source (14) configured to emit illumination light that illuminates a lens (L); a light transmission and reflection device (20) configured to reflect or transmit the illumination light; an image sensor (11) configured to detect the illumination light reflected by the light transmission and reflection device (20) to thereby obtain an image of the lens (L); a lens meter (12) configured to detect the illumination light that has passed through the light transmission and reflection device (20) to thereby measure characteristics of the lens (L); and a blocking member (70) configured to attach a leap block (B) to the lens (L). The light transmission and reflection device (20) comprises: a first reflection plate (41) having a central hole (2) formed in a center thereof; a first rotating cylinder (44) configured to be coupled to the first reflection plate (41) and to rotate the first reflection plate (41); a second rotating cylinder (43) configured to be located inside the first rotating cylinder (44) and to rotate the first rotating cylinder (44); a second reflection plate (42), the position of which is adjusted by the second rotating cylinder (43) and which is configured to open or block the central hole (2) formed in the first reflection plate (41); and driving means (13) configured to drive the second rotating cylinder (43).