Product Overview

This custom optical lens barrel was developed for a machine vision imaging system that required long optical distance and multiple lens mounting sections.

Typical specifications include:

Material: Aluminum Alloy 6061-T6
Surface treatment: Black anodizing (Type II matte finish)
Overall length: Approx. 320 mm
Outer diameter: 45 mm – 60 mm depending on section
Internal thread accuracy: 6H tolerance class

The black anodized surface helps reduce internal reflections and stray light, which is critical for maintaining image quality inside the optical lens barrel.

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Multi-Section Structural Design

Unlike a single cylindrical lens housing, this optical lens barrel uses a modular multi-section structure.

Each section serves a specific function:

• Upper section – interface for optical lens assembly
• Middle section – camera or sensor mounting window
• Lower section – additional lens or filter installation area

The multi-stage design allows engineers to adjust optical distances while maintaining mechanical stability within the optical lens barrel.

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Precision Machining Requirements

Manufacturing this type of optical lens barrel requires strict control over several mechanical parameters.

Concentricity Control

The concentricity between internal bores and external cylindrical surfaces must remain within:

≤0.01 mm

This ensures that optical elements remain aligned along the optical axis.

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Internal Thread Precision

Multiple internal threads are used for lens mounting.

Thread tolerance:
Class 6H

Thread pitch accuracy is critical to ensure the lens can be installed smoothly without affecting the alignment of the optical lens barrel.

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Surface Finish

Internal surfaces require controlled roughness to minimize stray light reflections.

Typical internal surface finish:

Ra 1.6 – Ra 3.2 μm

After machining, the parts undergo black anodizing treatment to further improve light absorption inside the optical lens barrel.

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Machining Process

To maintain structural stability, the optical lens barrel is produced using a multi-stage CNC machining process.

Manufacturing steps include:

1. CNC turning for cylindrical outer surfaces

2. 4-axis milling for side windows and mounting holes

3. Internal boring for lens positioning features

4. Precision threading for optical interfaces

5. Surface treatment and final inspection

All optical lens barrel components are inspected using coordinate measuring machines (CMM) to verify dimensional accuracy.

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Applications

Custom optical lens barrel assemblies like this are commonly used in:

Machine vision inspection systems
Industrial cameras
Laser imaging equipment
Scientific optical instruments
Semiconductor inspection tools

These systems rely on precisely manufactured optical lens barrel components to maintain optical alignment and imaging performance.

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Custom Optical Lens Barrel Manufacturing

At XY-Global, we specialize in producing complex optical lens barrel assemblies for high-precision optical systems.

Our capabilities include:

Precision CNC turning and milling
Thread machining for optical interfaces
Tolerance control up to ±0.01 mm
Black anodized finishes for optical applications
Prototype to batch production

By combining engineering expertise and precision machining technology, we help customers develop reliable optical lens barrel solutions for demanding optical applications.