Precision L-shaped Optical Emission Tube

1.Product Overview

This precision L-shaped optical emission tube is a custom CNC machined optical component. It is manufactured by CNC milling, precision drilling and tapping. The component is equipped with multiple mounting planes, reinforcing ribs and high-precision hole systems. The inner wall must be matte black with zero bare aluminum to avoid light reflection. Prototype and small-to-medium batch custom production are available for optical emission assemblies and precision optical instruments.

2.Core Specifications

Note: The above dimensions are reference values from drawing. All dimensions can be customized according to customer engineering drawings.

3.Product Features & Technical Advantages

1)High-tolerance Machining + Optical-grade Matte Black Inner Wall We adopt CNC milling + precision drilling & tapping workflow:

• OP1 Raw material cutting & rough machining: Cut from aluminum plate/rod, rough mill with 0.3~0.5mm stock left for finishing, keep clamping tabs.
• OP2 Semi-finish & finish machining (critical step): Custom fixture or soft jaw vise clamping. Use main mounting surface as datum. Complete most features in one clamping to guarantee strict hole pitch tolerance such as 14±0.03mm. Finish profile, inner steps and 45° inclined face. For tiny M2/M2.5 threads, rigid tapping is used to avoid tap breakage. The Φ7 high precision bore is finished by reaming or helical milling to meet tolerance and inner surface quality for subsequent optical blackening treatment.
• OP3 Deburring & cleaning: Focus on deburring the tube inner cavity, thread holes and intersecting inner features. Burr residue will cause bare spots and light reflection after anodizing. Thorough cleaning is required to keep inner wall clean.
• OP4 Surface treatment: Optical matte black anodizing. Special inspection on the tube inner wall to ensure fully matte black without bare aluminum, eliminating stray light reflection. Film thickness controlled at 5–10μm, avoiding dimensional change of precision mating holes.

2)Deformation Control for Thin-wall Optical Tube Thin wall sections are vulnerable to cutting force deformation. Optimized clamping strategy and cutting parameters reduce machining stress, maintaining flatness, positional accuracy and optical coaxiality of the inner bore.

3)Stable Machining of Micro Holes & Tiny Threads Capable of machining Φ0.6 micro holes and small M2/M2.5 threads. High-performance cutting tools and synchronous tapping cycles reduce tool breakage risk.

4)Optical-specific Matte Black Surface Control Custom matte black anodizing process for optical applications. The inner wall is the key inspection area. 100% visual check after anodizing to eliminate bare aluminum and stray light reflection.

4.Customization Options

• Adjust overall dimensions, hole locations, thread specifications as per drawings
• Modify tolerance requirements for precision holes and positional tolerances
• Adjustable optical matte black anodizing film thickness; other light-absorbing surface finishes available upon evaluation
• Standard material: 6061 aluminum alloy, other materials negotiable

5.Packaging & Shipping

1. Each part wrapped with bubble / EPE foam. Special protection for the matte black inner wall surface to avoid scratches and bare spots caused by impact.
2. Bulk orders packed in sturdy cartons with buffer filler.
3. Worldwide shipping by express or sea freight.

6.Information Required for Quotation

To provide accurate quotation, please prepare the below information:

1. Anodizing film thickness requirement: Standard 8–12μm acceptable? Hard anodizing or micro-arc oxidation can be discussed (generally not recommended for this optical tube). Inner wall must be fully matte black with zero bare aluminum to prevent light reflection.
2. Fit type of Φ7 inner bore: Clearance fit or transition fit? This determines reaming/boring process and total machining cost.
3. Order quantity: Prototype / small batch / mass order. Fixture cost will be amortized differently for different volumes.
4. Engineering files: 2D drawing with full tolerances or STEP model, clearly mark optical anti-reflection requirements.

7.FAQ

Q1: Can you guarantee the tight hole pitch tolerance ±0.03mm?

A: Yes. We adopt one-setup clamping strategy and optimized machining sequence to achieve this tolerance. DFM review will be completed before production to ensure optical position accuracy of the emission tube.

Q2: Can the inner wall of the optical tube achieve fully matte black without bare aluminum and prevent light reflection?

A: Yes. We implement special process for optical tube inner cavity: intensive deburring + ultrasonic cleaning. Each piece is visually inspected after anodizing to ensure the inner wall is fully matte black with no bare aluminum, suppressing stray light reflection.

Q3: What is the lead time for samples?

A: Standard prototype lead time is 7-15 working days. Bulk lead time depends on order quantity and complexity. Extra inspection steps are required for optical matte black anti-reflection finish.

Q4: What if thin-wall optical tube deforms after machining?

A: We evaluate deformation risk in DFM analysis before production and propose process optimization solutions to avoid distortion and guarantee optical performance.

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