Optical Polishing & Lapping Services - Industry Leaders in Ultra-Precision Surface Finishing

Precision Crafted for
Top Surface Quality Components

In today’s competitive high-tech manufacturing environment, surface quality and precision often mark the critical difference between success and failure. Since 2007, YISHUN Optical has been dedicated to providing industry-leading optical polishing and lapping services, solving the most challenging precision machining needs for clients worldwide. Our specialized technology achieves nano-level accuracy with surface roughness as low as Ra 1 nm, dimensional tolerances precise to ±0.5 μm, making us the partner of choice for industries where extreme precision is non-negotiable.

Are you facing these challenges?

Optical components requiring extreme flatness and surface quality
Complex geometries needing precise polishing
Ultra-precision surface finishing requirements for hard materials
High-volume production needs under strict tolerance requirements
Processing difficulties with special materials like sapphire, silicon carbide, or quartz

YISHUN Optical has the advanced equipment, technical expertise, and experienced engineers to provide comprehensive optical polishing and lapping solutions, no matter how complex your project or how stringent your requirements.

Understanding Our Core Services

Precision Polishing Services

Polishing is a process that uses abrasive materials to remove surface irregularities and create a smooth, reflective finish. At YISHUN Optical, we employ cutting-edge technology and equipment to process a variety of materials, including metals, ceramics, optical glass, and plastics, providing precise polishing solutions for industries like electronics, optics, and aerospace.

Our polishing capabilities:

High-Precision Lapping Services

Lapping (Loose Abrasive Polishing) is a specialized process that ensures metal part surfaces are as uniformly flat as possible. This process can also create a fine or mirror finish on specific metals.

YISHUN Optical has been providing precision lapping services since 2007, specializing in high-accuracy optical and mold components. Our lapping processes achieve:

Distinguishing Between Polishing and Lapping

While both polishing and lapping are used for surface refinement, they differ in technique and outcome:

Lapping: Involves two surfaces rubbing against each other with abrasive material in between. This technique is often used for achieving extreme flatness and is ideal for applications such as lens manufacturing, mold finishing, and optical component processing.
Polishing: Uses soft materials like felt or cotton pads with fine abrasives to create a mirror-like finish. It's typically used for the final surface finish, enhancing the smoothness and gloss of the material.

In many cases, both lapping and polishing are used in sequence to achieve the required surface precision.

Our Technological Advantagesents

YISHUN Optical employs multiple advanced processes to provide the optimal solution for your specific needs

Polishing Methods

Precision Polishing:Using soft materials and fine abrasives to create mirror-like effects
Lapping: Abrasive friction between two surfaces to achieve extreme flatness
Barrel Polishing: Ideal for batch polishing of smaller components
Chemical Mechanical Polishing (CMP): High-precision polishing combining chemical and mechanical action
Electropolishing: Electrochemical process for materials difficult to polish by traditional methods

Lapping Processes

Polishing Procedure

Our polishing process is broken into several stages:

Rough Polishing: Coarse abrasives are used to remove large surface irregularities
Medium Polishing: Finer abrasives smooth out the surface, removing smaller imperfections
Finishing: The surface is polished with even finer abrasives to refine its smoothness and achieve the desired finish
Mirror Finish: The final step involves using the finest abrasives to achieve a mirror-like surface with minimal material removal

Materials We Process

YISHUN Optical has expertise in handling a wide range of advanced materials:

Metals

Ceramics

Crystalline Materials

Plastics

Applications

We process a wide range of components used in advanced industries

Wafer Chuck Plates & Precision Tables

We provide ultra-precision polishing for positioning plates and precision tables used in semiconductor manufacturing and precision measurement. Our services ensure high accuracy in flatness, parallelism, and dimensional tolerance.

Various Crystal Wafers

We perform precision Chemical Mechanical Polishing (CMP) and thin polishing of wafers made from materials such as silicon, sapphire, SiC, and diamond. We can handle small lots for experimental research or large-scale mass production.

Shims

Our shims are manufactured to guarantee high accuracy, with thickness variations as small as 1 μm. These are essential in applications requiring precise assembly, such as in electronic devices, medical equipment, and precision measurement tools.

Test Pieces

We process test pieces used in friction, wear, and tensile tests. Our service is versatile and supports rapid turnaround for experimental and testing purposes.

Surface Plates

Surface plates used for assembly and inspection require absolute flatness. We provide precision machining for both stone and ceramic surface plates, as well as thermal spraying for specialized surfaces.

Molds

We offer precision polishing for molds used in manufacturing products via injection molding, press working, and plastic working. Our expertise ensures that even complex shapes and lens molds are polished to the highest standards.

Spheres

Our polishing services extend to high-precision spherical components used in bearings, measuring probes, and other high-accuracy applications. We can achieve ultra-precision on spherical surfaces with strict tolerances for sphericity and roughness.

Industry Solutions

YISHUN Optical’s ultra precision machining services meet the needs of multiple industries

Semiconductor & Electronics

The microelectronics industry demands extremely strict requirements for component accuracy and surface quality. Our services provide the nano-level precision needed for wafer processing equipment, precision positioning systems, and electronic packaging.

Medical Devices

Medical device manufacturers rely on our ultra precision machining capabilities to ensure the performance and reliability of implants, surgical instruments, and diagnostic equipment.

Optics & Laser

From high-end camera lenses to laser systems, our machining techniques provide optical elements with the performance characteristics they require.

Automotive Industry

Precision automotive parts, particularly those used in advanced driver assistance systems (ADAS) and electric vehicles, rely on our services for exceptional performance.

New Energy

Solar cells, fuel cells, and energy storage devices all require precise component machining, which is precisely where YISHUN Optical's expertise lies.

The Lapping Process in Detail

Lapping is an advanced process used to flatten surfaces with extreme precision, achieving tolerances of up to 0.0005 to 0.00002 inches. We adjust pressure and process duration to suit the material and required finish, ensuring a mirror-like flatness. Unlike fine grinding, lapping uses loose abrasives, which makes it ideal for achieving the highest levels of surface smoothness.

Ment, surface quality and precision often mark the critical difference between success and failure. Since 2007, YISHUN Optical has been dedicated to providing industry-leading optical polishing and lapping services, solving the most challenging precision machining needs for clients worldwide. Our specialized technology achieves nano-level accuracy with surface roughness as low as Ra 1 nm, dimensional tolerances precise to ±0.5 μm, making us the partner of choice for industries where extreme precision is non-negotiable.

Precision Lapping for Harder Materials

Our lapping services are especially effective for harder materials, achieving finer tolerances and superior finishes compared to softer materials. Only very rigid materials can be polished to a true mirror finish, which is perfect for high-precision optical and mold applications.

Lapping Process Considerations

Lapping is an averaging process, removing material primarily from high points on the surface to create a flat, smooth finish. The process is carefully controlled to meet specific material removal and surface smoothness requirements. Factors we consider when quoting a lapping process include:

The result is a uniform, smooth, and flat surface, ideal for high-precision components.

Fine Metal Grinding & Double-Sided Lapping Services

In addition to single-sided lapping, we offer fine metal grinding, also known as double-sided lapping. This process works on both sides simultaneously, using a bonded abrasive plate for high precision, ensuring parallelism and uniformity across both faces.

Fine Metal Grinding Advantages at YISHUN Optical

Our fine grinding technology provides precise control of thickness and parallelism. By processing both sides simultaneously, we achieve consistent flatness and material removal rates, ensuring high-precision results and increased efficiency.

Abrasive Technology

Abrasive grains are hard particles that act as the “cutting tools” during the polishing and lapping process. They wear down during use, continuing to refine the surface with each pass. At YISHUN Optical, we utilize both general abrasives and superabrasives, each suited to different materials and applications.

Our abrasive selection includes:

Brown Alumina (A): Used for general steel and free grinding
White Alumina (WA): High-purity alumina, often used for hardened steels
Silicon Carbide (C): A harder abrasive, ideal for non-ferrous metals and cast iron
Green Silicon Carbide (GC): Used for high-precision materials like cemented carbide
Diamond: The hardest abrasive, used for extremely hard materials and ultra-precision requirements
Cubic Boron Nitride (CBN): Nearly as hard as diamond, excellent for ferrous materials

The selection of the appropriate abrasive type, size, and concentration is a critical factor in achieving the desired surface quality and dimensional accuracy.

YISHUN Optical's Equipment Advantage

Our facility is equipped with state-of-the-art polishing and lapping machinery:

Single-Sided Lapping Machines: Precision-controlled pressure and rotation for perfect flatness
Double-Sided Lapping Systems: Simultaneous processing of both surfaces with exceptional parallelism
CNC Polishing Centers: Computer-controlled precision for complex geometries
Ultra-Precision Diamond Turning Machines: For nano-level surface quality
Advanced Metrology Equipment: Including interferometers, profilometers, and coordinate measuring machines for quality verification

Each piece of equipment is maintained in pristine condition and operated in environmentally-controlled conditions to ensure the highest levels of precision.

Quality Assurance

YISHUN Optical’s commitment to quality is evident in every step of our process

Inspection Equipment

Quality Procedures

Certifications

Why Choose YISHUN Optical?

Advanced Technology and Equipment

Material Expertise

Quality Commitment

Extensive Experience

Customer
-Centric Approach

How Our Customers Benefit

Get Started with Your Optical Mold Design

Ready to elevate your optical projects with precision-engineered molds? Contact Yishun Optical today to discuss your requirements. Our team is dedicated to providing customized solutions that bring your optical vision to life.