Lens Mounting Fixture for Optical Polishing

Q: What is the clamping force range of the lens mounting fixture?

The clamping force is adjustable from 50 to 200 N, ensuring lens stability without deformation. The exact force required depends on the lens material and geometry, so it should be set according to the manufacturer's recommendations.

Q: What is the positioning accuracy and repeatability?

The positioning accuracy is ±0.01 mm, and repeatability is ±0.005 mm. These values are critical for optical alignment and consistent lens placement. Verify these specifications with the supplier for the specific model.

Q: What materials are used for the fixture?

The fixture is available in stainless steel, aluminum alloy, or precision ceramic. Material hardness is 45–55 HRC (ASTM E18), and surface roughness is Ra 0.4–0.8 µm (ISO 4287) to prevent lens scratching.

Q: What are the operating pressure and temperature requirements?

The fixture requires a pneumatic supply of 0.4–0.6 MPa for actuation. It operates within a temperature range of -10 to 50 °C. Outside this range, material properties may degrade, so ensure the environment meets these conditions.

Product Specifications

Technical details and manufacturing context for Lens Mounting Fixture

Definition

The Lens Mounting Fixture is a precision component used in the Polishing Spindle Assembly of optical manufacturing equipment. Its primary function is to provide a stable and accurate mounting platform for optical lenses during polishing, ensuring precise alignment and secure clamping to achieve required surface finishes and optical specifications. The fixture is designed to accommodate lenses with diameters ranging from 5 to 100 mm, with positioning accuracy of ±0.01 mm and repeatability of ±0.005 mm, ensuring consistent lens placement. Clamping force is adjustable between 50 and 200 N, providing sufficient grip without deforming the lens. The fixture operates within a temperature range of -10 to 50 °C, and requires a pneumatic supply of 0.4 to 0.6 MPa for actuation. It is constructed from materials such as stainless steel, aluminum alloy, or precision ceramic, with a material hardness of 45–55 HRC (per ASTM E18) and surface roughness of Ra 0.4–0.8 µm (per ISO 4287) to prevent lens scratching. The fixture weighs between 1.5 and 3.5 kg, and has an ingress protection rating of IP54 (per IEC 60529) to guard against dust and water splashes. This component is essential for maintaining controlled material removal and surface refinement during polishing. It is used in the computer, electronic, and optical product manufacturing industry. For specific applications, it is critical to verify model-specific values and standards with the legal manufacturer or supplier, as the listed parameters are reference ranges that must be confirmed for the actual model and application.

Working Principle

The fixture uses mechanical clamping mechanisms, such as collets, vacuum chucks, or precision jaws, to securely hold the lens periphery or edge. It interfaces with the polishing spindle to maintain consistent positioning and orientation throughout the polishing cycle. The clamping force is pneumatically actuated, typically within 0.4–0.6 MPa, and is adjustable to ensure lens stability without deformation. The fixture's precise alignment and repeatability ensure that the lens remains in the correct position during polishing, allowing for controlled material removal and surface refinement.

Common Materials

Stainless Steel, Aluminum Alloy, Precision Ceramic

Technical Parameters

Parameter	Typical range	Notes & selection driver
Clamping Force	50–200 N	Ensures lens stability without deformation
Positioning Accuracy	±0.01 mm	Critical for optical alignment
Repeatability	±0.005 mm	Ensures consistent lens placement
Lens Diameter Range	5–100 mm	Accommodates common optical lens sizes
Operating Temperature	-10–50 °C	Outside this range, material properties may degrade
Material Hardness	45–55 HRC	Hardness ensures wear resistanceASTM E18
Surface Roughness	Ra 0.4–0.8 µm	Smooth finish prevents lens scratchingISO 4287
Weight	1.5–3.5 kg	Lightweight for ease of handling
Operating Pressure	0.4–0.6 MPa	Pneumatic actuation; below 0.4 MPa clamping force insufficient
Ingress Protection	IP54	Protects against dust and water splashesIEC 60529

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

Components / BOM

Collet Chuck
Provides concentric clamping force around lens periphery

Material: Stainless Steel
Mounting Plate Part
Interface between fixture and polishing spindle

Material: Aluminum Alloy
Alignment Pins Part
Ensures precise angular positioning of lens

Material: Hardened Steel
Pneumatic Actuation Unit
Supplies and adjusts the clamping force at 0.4–0.6 MPa so the lens is held without being deformed.

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	Max 0.5 MPa clamping pressure, 0.1-0.3 MPa typical polishing pressure
other spec:	Slurry concentration: 5-20% abrasive by weight, Max lens diameter: 200mm, Vibration tolerance: <5μm RMS
temperature:	15-35°C (operating), -10 to 60°C (storage)

Media Compatibility

✓ Cerium oxide polishing slurry ✓ Diamond abrasive suspension ✓ Silica-based colloidal polishing compounds

Unsuitable: Hydrofluoric acid or strong alkaline cleaning solutions

Sizing Data Required

Lens diameter and curvature radius
Required positional accuracy (microns)
Polishing machine interface specifications

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Misalignment-induced stress cracking

Cause: Improper lens seating during mounting creates uneven pressure distribution, leading to micro-fractures in the fixture material, especially at stress concentration points like mounting holes or edges.

Thread galling or stripping

Cause: Repeated tightening/loosening cycles with inadequate lubrication or using incorrect torque values causes wear on threaded components, eventually leading to loss of clamping force or complete thread failure.

Maintenance Indicators

Visible lens wobble or play when mounted, indicating loss of precise alignment or clamping force
Audible clicking or grinding sounds during lens insertion/removal, suggesting worn or damaged mating surfaces

Engineering Tips

Implement torque-controlled tightening procedures using calibrated tools to ensure consistent, manufacturer-specified clamping force without overstressing components
Establish regular cleaning and inspection protocols for all contact surfaces, using appropriate optical-grade lubricants on moving parts to prevent abrasive wear and corrosion

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

ISO 10110-7:2017 (Optics and photonics - Preparation of drawings for optical elements and systems - Surface imperfection tolerances) ANSI/ASME B46.1-2019 (Surface Texture, Surface Roughness, Waviness, and Lay) DIN 3140-1:2015 (Optics and optical instruments - Mounting of optical elements - Part 1: General principles)

Quoted from the published standard.

Manufacturing Precision

Bore concentricity: +/-0.01mm
Mounting surface flatness: 0.005mm

Quality Inspection

Coordinate Measuring Machine (CMM) dimensional verification
Interferometric surface flatness testing

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

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Inspection readiness

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

Supplier transparency

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Manufacturers of Lens Mounting Fixture

Manufacturer profiles associated with Lens Mounting Fixture.

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Frequently Asked Questions

What is the clamping force range of the lens mounting fixture?

The clamping force is adjustable from 50 to 200 N, ensuring lens stability without deformation. The exact force required depends on the lens material and geometry, so it should be set according to the manufacturer's recommendations.

What is the positioning accuracy and repeatability?

The positioning accuracy is ±0.01 mm, and repeatability is ±0.005 mm. These values are critical for optical alignment and consistent lens placement. Verify these specifications with the supplier for the specific model.

What materials are used for the fixture?

The fixture is available in stainless steel, aluminum alloy, or precision ceramic. Material hardness is 45–55 HRC (ASTM E18), and surface roughness is Ra 0.4–0.8 µm (ISO 4287) to prevent lens scratching.

What are the operating pressure and temperature requirements?

The fixture requires a pneumatic supply of 0.4–0.6 MPa for actuation. It operates within a temperature range of -10 to 50 °C. Outside this range, material properties may degrade, so ensure the environment meets these conditions.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Polishing Spindle Assembly

View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

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 · Page last updated 12 October 2026

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