Precision Manufacturing, Connected

From eyewear components to precision parts, supporting development, sampling and volume production.

12Product CategoriesOEMDrawing & Sample BasedQCProcess Quality Control

Est. 2005 | Full-Chain Manufacturing & In-House Testing

To Be Your Reliable Partner

JYD Optitech Company Limited is a leading vertically integrated manufacturer in the global eyewear industry. Our head office is located in Longgang District, Shenzhen — the core area of China's mid-to-high-end eyewear manufacturing. We firmly believe that product quality and on-time delivery are the cornerstones of our business. All operations and development of our company are centered around these core priorities. Since 2005, the company has invested more than RMB 30 million, steadily deepening its expertise across every stage of a wide range of eyewear accessories.

Our Production Capabilities

With 20+ years of continuous investment and development, we have built a complete eyewear industrial chain. Our product range includes:

Stampings, Castings, Etched Parts, Injection Molded Parts, Hinges, Rim-locks, Wire rims. Based on our self-sufficient production of core components without reliance on external suppliers, our full-chain manufacturing system guarantees stable quality, controllable lead times and cost advantages for all our partners.

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Products & Services

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Tech & Tips

Micro Vickers Hardness Testing for the Eyewear Industry

Micro-indentation data supports material selection, process validation and quality decisions.

The Complementarity of Video Measuring Machines and Digital Projectors in the Eyewear Industry

The previous two articles introduced video measuring machines and digital projectors respectively, including their basic functions, principles, practical applications in the eyewear industry, and their respective advantages. No one is perfect, and the moon waxes and wanes; the same goes for measuring instruments. Only by complementing each other's strengths can they safeguard eyewear quality.

Wide Application of Video Measuring Machines in Eyewear Production

The previous article introduced the digital projector. When more precise measurement data is required, a Video Measuring Machine is needed.

Application of Digital Measuring Projectors in Eyewear Production

Eyewear parts are small and varied in shape, and in the past they were mostly judged with magnifying glasses and measuring tools. Digital measuring projectors magnify and project the outline of a part onto a screen, making edges, shapes and positional relationships more intuitive.

Spring Hinge 20,000-Cycle Durability Test Record

I. Test Background and Purpose

A Tool for Twisting

In the eyewear industry, temple shapes, decorations, patterns, and designs are incredibly diverse, and manufacturing techniques vary from maker to maker. This article focuses on one such technique, with emphasis on its production process and the tools used.

The Lost-Wax Casting Process for Metal Eyewear Components

Lost-wax casting is well suited to metal parts with complex shapes, fine details, or both decorative and structural functions. In production, wax is first formed into wax patterns matching the shape of the target part. The patterns are then assembled into a wax tree, and plaster slurry is poured around it to form the casting mold. After dewaxing by burnout, a cavity remains inside the mold; molten metal is then poured in, and after cooling, a cast blank is obtained.

Effect and Analysis of Extrusion Processing on Material Hardness

In the processing of eyewear metal components, hydraulic forming causes plastic deformation of the material, and hardness may change accordingly. This article uses a cupronickel product as an example to compare hardness records before the first hydraulic pressing, after the first hydraulic pressing, and after a second pressing and edge trimming. The test force for this test was 500 gf, and the average was taken after 5 measurements; the instrument type, measurement point locations at each stage, and raw readings still need to be verified.

The Never-Ending Story of Us

Milestones in equipment, production lines, our team and company development.

In-house Testing: Making Quality Measurable

Spectrometry, hardness, fatigue and hinge durability testing support product verification.

New Casting Production Line

Expanded manufacturing capability supports more structural and volume projects.

New Machines

New equipment was installed and commissioned to strengthen precision processing and stable delivery.

Contact Us

Reach us by email or find our address and contact information.

ken@jyd-optitech.com

Tech & Tips

Wide Application of Video Measuring Machines in Eyewear Production

2026-09-23

The previous article introduced the digital projector. When more precise measurement data is required, a Video Measuring Machine is needed.

Its working principle is roughly as follows: the lens images the workpiece onto a CCD/CMOS, and the software extracts edges and fits lines and circles; displacement in the X and Y directions is counted by a linear scale, and the two are combined to calculate the actual dimensions—that is, optical imaging + image processing + grating displacement measurement, with no visual alignment required throughout the process (for relevant standards, see GB/T 24762-2009 "Geometrical product specifications (GPS)—Acceptance and reverification tests for video measuring machines").

For irregular or uneven products, a projector often cannot measure them, and this is when a Video Measuring Machine is needed to capture data. With the support of the "chip," the crystallization of human wisdom, the determination of circle centers and the measurement of data for irregular products are extremely precise, reaching the micron level, and data of 0.001mm can be read out, which also makes it more accurate in data capture than a digital projector.

Here is an example from a factory measurement: taking the distance from the circle center to the edge to be measured, such as a hinge, after standardized placement, three points are used to determine the circle center, and then a horizontal line is drawn on the edge to be measured; through the supporting program on the computer, the distance from the circle center to the edge to be measured can be determined, for example the "hinge position."

However, in the eyewear industry, a single device is absolutely not enough; to ensure product quality and strictly control data, multiple machines need to work in coordination, and measurement is no exception. Out of the need to control shape and drawing data, a Video Measuring Machine and a digital projector must be combined to safeguard product quality. In the next article, I will discuss how the two machines work together. If there are any errors in this article, corrections are welcome; if you would like to learn more or add something, you are also welcome to contact us.

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