Collimating Lens Element: Diameter 5-50 mm

Q: What is the primary function of a collimating lens element?

It converts divergent light into parallel rays to ensure precise beam alignment and minimal divergence in optical systems.

Q: How do I select the right collimating lens for my application?

Consider focal length, material compatibility (e.g., thermal stability), coating type for wavelength range, and adherence to standards like ISO 10110 for optical performance.

Component Specifications

Definition

A collimating lens element is a precision optical component designed to transform divergent or converging light beams into parallel rays with minimal divergence. This element is critical in optical systems where controlled beam direction and collimation are required for accurate measurement, alignment, or illumination. It functions by precisely refracting light through curved surfaces to achieve parallel output, ensuring consistent optical performance in applications like laser systems, fiber optics, and imaging devices.

Working Principle

The collimating lens element operates on the principle of refraction, where light passing through the lens is bent at specific angles determined by the lens curvature and refractive index. By carefully designing the lens surfaces (typically plano-convex or biconvex), divergent light from a point source is refracted to emerge as parallel rays. This is achieved when the light source is positioned at the focal point of the lens, allowing the lens to correct beam divergence and maintain optical alignment over distance.

Materials

Optical-grade materials such as fused silica, BK7 glass, or acrylic polymers, with anti-reflective coatings (e.g., MgF2) to minimize losses. Specifications include refractive index (e.g., 1.517 for BK7), Abbe number (>55 for low dispersion), and surface quality (scratch-dig 20-10 per MIL-PRF-13830).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Coating	AR coating, 400-700 nm
Diameter	5-50 mm
Focal Length	10-200 mm
Surface Accuracy	λ/4 at 632.8 nm
Numerical Aperture	0.1-0.5
Operating Temperature	-20°C to 80°C

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

Parent Products

This component is used in the following industrial products

Collimating Lens System

An optical system that converts divergent or convergent light beams into parallel (collimated) beams.

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Engineering Analysis

Risks & Mitigation

Misalignment due to improper installation
Thermal expansion affecting focal length
Surface contamination reducing transmission efficiency

FMEA Triads

Trigger: Improper alignment during assembly
Failure: Beam divergence exceeds specifications
Mitigation: Use precision mounting fixtures and alignment tools; perform regular calibration checks.

Trigger: Exposure to high temperatures
Failure: Lens material degrades or deforms
Mitigation: Select materials with high thermal stability (e.g., fused silica); implement cooling systems in high-temperature environments.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Focal length tolerance ±1%, surface figure λ/4, centering error <3 arcmin

Test Method

Interferometry for surface accuracy, autocollimation for focal length verification, spectrophotometry for coating performance

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

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Manufacturers of Collimating Lens Element

Manufacturer profiles associated with Collimating Lens Element.

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Frequently Asked Questions

What is the primary function of a collimating lens element?