Custom Optical Products & Precision Machining Solutions

From custom lens barrels to electronics housings— industry-leading precision at scale

CAPABILITIES SECTION

tilt-shift lenses, zoom lenses, prime lenses, wide-angle lenses, and so on

Photography Optical Components

Lens Barrel Precision Machining
Custom Adapter Ring Manufacturing
Optical Axis Alignment
Glass-to-Metal Interface Design

We specialize in precision-manufactured optical components for photography and imaging systems. Our expertise spans custom lens barrels, precision adapter rings, and complex optical housings that meet the stringent requirements of professional photography equipment.

Custom Electronics Metal Enclosures

Smartphone/Smartwatch Housing
Robot/Drone Chassis Design
EMI/RFI Shielding Integration
High-Volume Die Casting & CNC

Consumer electronics demand aesthetics AND functionality. We design and manufacture custom metal housings for smartphones, smartwatches, robotic vacuums, and IoT devices—where precision machining meets mass production.

Non-Standard Custom Hardware

Precision Cage/Bracket Design
Complex Multi-Axis Machining
Prototype to Production Scaling
ISO 9001 Quality Standards

Advanced capabilities include multi-axis CNC turning and milling, precision drilling, tapping, and complex grinding. We work with a full range of materials—aluminum, stainless steel, brass, titanium—and apply specialized surface treatments as required for performance and aesthetics.

Custom Optical System Components

Telescope Barrel Manufacturing
Microscope Objective Housings
Precision Optical Mount Design
Diamond Turning Capabilities

Optical precision instruments—telescopes, microscopes, spectrometers—demand the highest level of mechanical precision. We manufacture complex optical component housings with tolerances measured in nanometers.

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Our Core Advantages

Leedsen has incomparable advantages over other factories in R&D, design and production.

Nanometer-Level Precision

Achieve tolerances as tight as ±0.001mm with advanced CNC machining and diamond turning techniques—critical for optical systems.

Multiple material options

Expertise across aluminum alloys, stainless steel, titanium, brass, plastics, and specialty optics materials—whatever your application demands.

Rapid Turnaround Delivery

From prototype to production runs—our agile manufacturing scales with your demand without compromising quality or precision.

Customization process

A reasonable cooperation process ensures the smooth progress of cooperation between both parties.

Requirements Communication and Feasibility Assessment

We need detailed communication of specifics. You need to inform us of your requirements or drawings in detail, and we will evaluate the plan and quotation based on this.

Solution Design and Quotation

At this stage, we will carry out customized design according to your requirements and the drawings you provide. Our team with 15 years of R&D experience will be committed to solving all problems and providing you with your ideal products.

Sample Production and Testing

After confirming your drawings and ideas, our R&D team will establish close communication with the production team to start making samples and prototypes, after which the quality inspection team will conduct strict tests on optical and mechanical properties.

Pre-production Sample and Final Confirmation

To ensure the product is foolproof, we will conduct a small-batch trial production according to your requirements so that the product can meet your expectations and those of the market.

Batch Production and Delivery

Our factory has more than 70 high-precision machines with high production capacity, and our large quality inspection team ensures that every product undergoes inspection rather than just random sampling.

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TECHNICAL EXPERTISE

Leedsen's products have incomparable advantages over those of other manufacturers.

PRECISION & TOLERANCES

Standard Tolerances: ±0.005" (±0.127mm)

Tight Tolerances: ±0.001" (±0.025mm)

Ultra-Tight: ±0.0005" (±0.0127mm) on select features

Surface Finish: Ra < 10nm (0.4 microinches) diamond-turned

Geometric Accuracy: ±0.0001" form/runout

Angular Precision: Within ±5 arc-seconds for optical mounts

CMM Verification: 100% inspection with traceable reports

Process Capability: Cpk > 1.33 on critical dimensions

CERTIFICATIONS & COMPLIANCE

CERTIFICATIONS:

ISO 9001:2015 (Quality Management

SGS certification)

Alibaba Gold Supplier

Gold Supplier of Chinese Manufacturing

RoHS Compliant (Electronics - Lead-Free)

STANDARDS & AUDITS:

NADCAP Certified (Nadcap.org)

Regular third-party audits

Documented process controls (SPC/SQC)

Traceability to material certs and test reports

Environmental: ISO 14001 certified facility

PRECISION & TOLERANCES

MATERIALS:

Aluminum Alloys (6061, 7075, specialty grades)

Stainless Steels (303, 304, 316, 17-4 PH)

Titanium (Grade 2, Grade 5/Ti-6Al-4V)

Brass & Copper Alloys Specialty Optical Glass & Crystals

Engineering Plastics (Delrin, Ultem, PEEK)

PROCESSES:

3/4/5-Axis CNC Milling & Turning

Single-Point Diamond Turning (SPDT)

Precision Grinding & Polishing Threading & Complex Bore Operations

Anodizing, Plating, Black Oxide Powder Coating & PVD Coatings

Case Studies

Leedsen has incomparable advantages over other factories in R&D, design and production.

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Trusted by Industry Leaders Worldwide

Leedsen's products have incomparable advantages over those of other manufacturers.

PHOTOGRAPHY & PROFESSIONAL IMAGING

MEDICAL DEVICES & SURGICAL INSTRUMENTS

CONSUMER ELECTRONICS & WEARABLES

ROBOTICS & AUTOMATION

Lens manufacturers rely on our precision barrel manufacturing for premium camera lenses. From telephoto lens barrels to adapter rings, we deliver optical-grade precision that ensures sharp imaging and reliable mount interfaces.

Surgical imaging systems, endoscope tubes, and precision surgical instruments demand zero defects. We deliver components meeting FDA and ISO 13485 standards with full traceability.

Smartphone housings, smartwatch casings, and wearable electronics require precision at scale. We deliver high-volume aluminum die castings and CNC finishing maintaining sub-micron tolerances across millions of units

Robot chassis, sensor housings, and drive mechanisms benefit from our precision machining. Whether autonomous vacuums or industrial arms, we provide components that enable advanced robotics.

Strict quality inspection

Leedsen’s four-fold quality inspection ensures product accuracy and error-free performance

Semi-finished product quality inspection

For the semi-finished products milled by CNC, we will use high-precision instruments to ensure that the error is within the normal range.

Parts quality inspection

Before installation, each small component undergoes quality inspection, including surface and precision testing.

Assembly quality inspection

When assembling, our experienced workers will carefully inspect the appearance to ensure there are no defects.

Optical quality inspection

Leedsen implements rigorous optical performance quality inspections, such as optical path inspection, focusing inspection, and imaging inspection

Pre-packaging quality inspection

A final quality inspection will be conducted before delivery to the customer.