Primary Lens: Diameter 10-200 mm, Focal Length 5-500 mm

Component Specifications

Definition

The primary lens is a critical optical component positioned at the front of an optical system, responsible for initial light collection, focusing, and directing light rays toward subsequent optical elements. It determines the system's field of view, focal length, and optical resolution, and is engineered to minimize aberrations such as spherical, chromatic, and distortion errors. In industrial applications, it ensures accurate light transmission for tasks like imaging, laser processing, spectroscopy, or quality inspection.

Working Principle

The primary lens operates based on the principles of refraction and focusing. Light rays entering the lens are bent (refracted) according to Snell's Law, converging at a focal point. The curvature, refractive index, and material properties of the lens determine its focal length, numerical aperture, and light-gathering capability. It transforms divergent or parallel light beams into focused patterns essential for precise optical functions.

Materials

Optical glass (e.g., BK7, Fused Silica), crystalline materials (e.g., Sapphire, Zinc Selenide), or polymers (e.g., PMMA, Polycarbonate) with anti-reflective coatings. Specifications include refractive index (1.45-2.4), Abbe number (>55 for low dispersion), and surface quality (scratch-dig < 40-20).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Coating	AR coating (400-700 nm or 700-1100 nm)
Diameter	10-200 mm
Focal Length	5-500 mm
Clear Aperture	>90% of diameter
Surface Accuracy	λ/4 to λ/20
Numerical Aperture	0.1-0.9

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 14997, 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

Scratches or contamination reducing optical performance
Thermal expansion under high-power light causing focal shift
Misalignment leading to image distortion or beam deviation
Coating degradation from environmental exposure

FMEA Triads

Trigger: Improper handling during installation
Failure: Surface scratches or cracks
Mitigation: Use cleanroom protocols, protective coatings, and automated handling systems

Trigger: Thermal stress from high-intensity light sources
Failure: Lens cracking or focal length drift
Mitigation: Select materials with low thermal expansion, use cooling systems, and design for thermal management

Industrial Ecosystem

Compatible With

Microscopes, Laser cutters, Spectrometers, Cameras, Projectors, Optical sensors

Typical Suppliers & Equivalents

Thorlabs, Edmund Optics, Newport, Zeiss, Olympus

Compliance & Inspection

Tolerance

Focal length tolerance ±1%, diameter tolerance ±0.1 mm, surface figure λ/4 per ISO 10110

Test Method

Interferometry for surface accuracy, spectrophotometry for coating performance, MTF testing for resolution

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.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Primary Lens

Manufacturer profiles associated with Primary Lens.

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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 is the difference between a primary lens and a secondary lens in optical systems?

The primary lens is the first optical element that collects and initially focuses light, setting the system's basic optical parameters. Secondary lenses (e.g., relay lenses, eyepieces) further refine the image or beam after the primary lens, correcting aberrations or adjusting magnification.

How do I select a primary lens for a laser processing application?

Consider wavelength compatibility (material transparency), focal length for spot size, numerical aperture for light collection, and damage threshold (for high-power lasers). Anti-reflective coatings specific to the laser wavelength reduce losses and heating.

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.

Primary Lens