INDUSTRY COMPONENT

Optical Lens

Precision optical lens for infrared pyrometers that focuses thermal radiation onto detectors for non-contact temperature measurement.

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Component Specifications

Definition
An optical lens in an infrared pyrometer is a critical optical component designed to collect, focus, and transmit infrared radiation emitted by a target object. It operates within specific infrared wavelength bands (typically 0.7-14 μm) to ensure accurate thermal energy capture. The lens's primary function is to direct this radiation onto an infrared detector (such as a thermopile or pyroelectric sensor), enabling the conversion of radiant energy into an electrical signal proportional to the target's temperature. Its performance directly impacts measurement accuracy, response time, and the pyrometer's effective working distance.
Working Principle
The lens operates based on the principles of geometric optics and infrared transmission. It collects divergent infrared rays emitted from a target surface and converges them onto a focal point where the detector is positioned. The lens material is selected for high transmittance in the pyrometer's operational wavelength range. It filters out unwanted visible light and focuses only the relevant infrared spectrum, minimizing measurement errors from ambient light interference. The focal length and aperture determine the field of view and spot size, critical for targeting specific areas on objects.
Materials
Common materials include Germanium (Ge) for 8-14 μm range, Zinc Selenide (ZnSe) for broad IR spectrum, Silicon (Si) for 1-7 μm, Sapphire for high durability in harsh environments, and Chalcogenide glasses. Coatings such as anti-reflective (AR) coatings are applied to enhance transmission and protect against environmental factors like moisture and abrasion.
Technical Parameters
ParameterTypical rangeNotes & selection driver
CoatingAnti-reflective, Diamond-like carbon (DLC) for protection
Diameter5-50 mm
Focal Length10-100 mm (varies by model)
Field Of View1° to 60°
Transmittance>90% in specified range
Spectral Range0.7-14 μm
Temperature Range-40°C to +300°C (operational)

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 18434-1, DIN 16160, ASTM E1256

Parent Products

This component is used in the following industrial products

Infrared Pyrometer

A non-contact temperature measurement device that detects infrared radiation emitted by objects to determine their surface temperature.

View Product Details

Barcode/QR Scanner

An optical device that reads barcode and QR code labels on chemical drums to capture identification and tracking data.

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Optical Counting Sensor

An optical sensor that detects and counts pharmaceutical tablets during bottling.

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Engineering Analysis

Risks & Mitigation
  • Lens contamination from dust/oil
  • Thermal shock from rapid temperature changes
  • Mechanical damage from impact
  • Coating degradation in corrosive environments
  • Misalignment affecting focal point accuracy
FMEA Triads
Trigger: Accumulation of particulate matter on lens surface
Failure: Reduced IR transmission, leading to lower signal-to-noise ratio and inaccurate temperature readings
Mitigation: Implement regular cleaning schedules using lint-free wipes and approved cleaners; install protective windows or air purges in dirty environments
Trigger: Exposure to temperatures beyond material limits
Failure: Lens cracking or permanent change in refractive index, causing focus shift and measurement failure
Mitigation: Select lens materials rated for operational temperature range; use cooling housings or thermal barriers in high-temperature applications

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Focal length tolerance ±2%, surface accuracy λ/4 at specified wavelength, diameter tolerance ±0.1 mm
Test Method
Testing per ISO 18434-1 for thermal performance, spectral transmission analysis using FTIR spectrometers, and environmental testing per IEC 60068 for shock/vibration resistance

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 Optical Lens

3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Beijing PDV Instrument Co., Ltd.
Beijing, CN
Listed on the company's own website · profile compiled by CNFX from public sources
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ECOPTIK
Shenzhen, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
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ECOPTIK China
Shenzhen, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

Why is material choice critical for an infrared pyrometer lens?

Material determines the lens's spectral transmission range. For example, Germanium is optimal for long-wave IR (8-14 μm), while Silicon suits shorter wavelengths. Incorrect material can block relevant IR radiation, leading to inaccurate temperature readings.

How does lens maintenance affect pyrometer accuracy?

Dust, scratches, or coatings degradation on the lens surface can scatter or absorb IR radiation, reducing signal strength and causing measurement drift. Regular cleaning with approved solvents and inspection is essential for consistent performance.

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.

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