Optical Housing: Surface Flatness ≤0.02 mm/m

Component Specifications

Definition

A precision-engineered structural component that encloses and supports optical elements (lenses, mirrors, sensors) within an optical system. It maintains precise alignment, provides mechanical stability, protects against environmental contaminants (dust, moisture, thermal fluctuations), and often includes mounting interfaces for integration into larger assemblies. Critical for maintaining optical performance in applications ranging from laboratory instruments to industrial vision systems.

Working Principle

The optical housing functions by providing a rigid, dimensionally stable framework that precisely positions optical elements along their optical axes. It isolates sensitive components from external mechanical vibrations, thermal expansion mismatches, and environmental contaminants. Through precision machining and alignment features (dovetails, kinematic mounts, adjustment screws), it ensures repeatable optical alignment while allowing for maintenance access. Thermal management may be integrated via heat sinks or insulating materials to minimize thermal drift.

Materials

Typically aluminum alloys (6061-T6, 7075) for lightweight rigidity, stainless steel (304, 316) for corrosion resistance, or engineered plastics (PEEK, Ultem) for electrical insulation. Internal surfaces may have black anodized or textured finishes to minimize stray light reflection. Sealing materials include silicone gaskets or O-rings for environmental protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight	Varies by size (typically 0.5-5 kg)
Surface Flatness	≤0.02 mm/m
Protection Rating	IP54 minimum (dust/water resistant)
Vibration Resistance	5-2000 Hz, 5g RMS
Dimensional Tolerance	±0.05 mm
Operating Temperature	-20°C to +70°C
Thermal Expansion Coefficient	Match optical elements

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 10110, ISO 9022, DIN 3140, DIN 58750

Parent Products

This component is used in the following industrial products

Optical System

A component of LED tunnel lights that controls and directs light output through optical elements.

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Engineering Analysis

Risks & Mitigation

Misalignment due to thermal expansion mismatch
Contamination ingress compromising optical surfaces
Vibration-induced image degradation
Galvanic corrosion in mixed-material assemblies

FMEA Triads

Trigger: Thermal expansion coefficient mismatch between housing and optical elements
Failure: Progressive misalignment during temperature cycling, leading to focus drift and image quality degradation
Mitigation: Select materials with matched thermal expansion coefficients; incorporate thermal compensation mechanisms; conduct thermal cycling tests during qualification

Trigger: Inadequate sealing at interfaces
Failure: Dust or moisture ingress contaminating optical surfaces, causing permanent damage or requiring frequent cleaning
Mitigation: Implement double O-ring seals at critical joints; specify IP-rated protection; include desiccant chambers for humidity control

Trigger: Resonant vibration frequencies within operating range
Failure: Image blurring or measurement errors during operation; eventual fatigue failure of mounting points
Mitigation: Conduct modal analysis during design; add damping materials; implement stiffening ribs; isolate from vibration sources

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerancing per ISO 1101; surface finish Ra ≤ 0.8 μm for sealing surfaces

Test Method

Coordinate measuring machine (CMM) verification; laser interferometry for alignment; thermal cycling per IEC 60068-2-14; vibration testing per MIL-STD-810

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Optical Housing

Manufacturer profiles associated with Optical Housing.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What are the critical tolerances for optical housing manufacturing?

Critical tolerances include bore concentricity (±0.01 mm), mounting surface flatness (≤0.02 mm), and thread precision for lens mounts. Thermal expansion matching to optical elements is equally important to prevent misalignment during temperature changes.

How does optical housing design affect system performance?

Housing design directly impacts optical performance through alignment stability, thermal management, and vibration damping. Poor design can cause image degradation, focus drift, or premature component failure due to mechanical stress or contamination ingress.

What materials are best for high-precision optical housings?

Aluminum alloys offer the best balance of machinability, weight, and thermal properties for most applications. Invar or carbon fiber composites are used for ultra-stable applications where thermal expansion must be minimized.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Optical Housing