Infrared optoelectronic systems are currently undergoing rapid evolution toward miniaturized integration, long-range detection, and all-weather operation. Conventional MWIR zoom lenses have long been plagued by an industry-wide dilemma: "large zoom comes with large size; small size comes with degraded image quality; lightweighting comes with compromised reliability." To overcome this technical hurdle, the Wh-Clear 15–315 mm F/4.0 MWIR zoom lens—featuring DLC coating and HOT detector technology—breaks through the constraints of optical architecture and mechanical design, delivering a 21× ultra-large zoom range within an exceptionally compact housing while maintaining uncompromised image quality across the full range and industrial-grade ruggedness. Perfectly matched to 640 × 512, 15 μm mainstream infrared detectors, it resolves the long-standing incompatibility between lightweight platform integration and high-precision long-range detection.

PART.1

Breaking the Size Barrier

21× Zoom in an Ultra-Compact, Lightweight Housing

    As a core differentiator, this lens truly achieves both high zoom ratio and small form factor—overturning the bulky, unwieldy form factor typical of conventional infrared lenses in its class. While industry counterparts in the 15–315 mm long-zoom infrared category generally feature oversized dimensions and excessive weight that hinder lightweight deployment, this lens leverages precision optical path compression and modular integration to condense the 21× ultra-zoom system into a compact Φ96 mm × 126 mm housing, with an overall optical length of just 137 mm and total weight strictly controlled under 1 kg.

    The streamlined, space-efficient design requires minimal installation space, enabling seamless integration into demanding platforms such as UAV gimbals, portable field detectors, compact vehicle-mounted optoelectronic systems, and miniature security reconnaissance terminals. Without sacrificing any zoom or detection performance, it provides core hardware support for weight reduction, size shrinkage, and miniaturization upgrades—making it the most competitively sized and lightweight MWIR zoom lens at this zoom ratio currently available.

PART.2

Consistent High Image Quality Across the Full Range

No Zoom Degradation Balanced Clarity at All Distances

    Built upon a custom aberration-corrected optical architecture, this lens overcomes the common pitfalls of conventional zoom lenses—wide-angle distortion, softness at telephoto, and image-quality discontinuities during zoom transitions—delivering uniformly sharp, high-resolution imaging across the entire focal range and full field of view, surpassing industry standards at equivalent specifications. The lens precisely matches the HOT19 cold shield clearance (19 mm–20 mm) and the 9.6 mm × 7.68 mm standard image plane, perfectly accommodating 640 × 512, 15 μm infrared detectors. It effectively suppresses stray light and minimizes imaging noise at the source, ensuring purity and resolution throughout the optical chain.

    The constant F/4.0 large aperture throughout the zoom range guarantees sufficient light throughput across the 3–5 μm MWIR operational band, delivering clean, crisp, and detail-rich images even in low-illumination conditions such as overcast skies or twilight hours—free from vignetting or performance drop-offs across the zoom range. The field-of-view performance covers all scenarios: the wide-angle setting of 35.5° × 28.7° enables rapid large-area screening and panoramic surveillance, while the narrow field of 1.75° × 1.4° precisely locks onto distant miniature targets. Zoom transitions are smooth and seamless, with highly consistent sharpness and contrast between near and far fields.

     The lens elements feature premium AR anti-reflection coatings as standard, significantly boosting infrared spectral transmittance, reducing reflection losses along the optical path, and enhancing image layering. Optional DLC (diamond-like carbon) coatings further reinforce optical performance while dramatically improving scratch and corrosion resistance. Combined with precisely calibrated back focal distance of 24.83 mm and back working distance of 11.6 mm, the lens rigorously controls spherical aberration, chromatic aberration, and distortion throughout—truly achieving zero image-quality degradation across the entire focal range and high-fidelity imaging over the full field.

PART.3

Industrial-Grade Rugged Reliability

Full-Environment Adaptability All-Weather Stability

     Designed for demanding field, industrial, airborne, and vehicular applications, the lens features a high-redundancy, high-durability industrial-grade ruggedized construction, delivering environmental adaptability and operational stability that are among the best in the industry—capable of meeting 24/7 uninterrupted all-weather operation demands. The product exhibits exceptional resistance to extreme temperatures, with an operating range spanning −40 °C to +60 °C—reliably performing in harsh environments including severe cold, snow, high-temperature exposure, and drastic day–night temperature swings—all without lens fogging, structural deformation, or image shift.

    The front lens element achieves an IP67 protection rating, effectively withstanding outdoor rain, sand and dust accumulation, and moisture ingress. It is ideally suited for high-risk, complex scenarios such as field exploration, border surveillance, outdoor industrial inspection, and vehicle-mounted monitoring under challenging road conditions—significantly reducing equipment maintenance costs and failure probability. Additionally, the lens supports clear imaging across the entire object distance range from 10 m to infinity, offering exceptional operational adaptability with no near-field blurring or far-field resolution limitations.

PART.4

Product Summary

    The Wh-Clear 15–315 mm F/4.0 MWIR zoom lens precisely tackles the three core industry pain points: breaking the bulky-device barrier with an ultra-compact form factor, eliminating zoom-induced image degradation with consistently high image quality across the full range, and building a rock-solid reliability foundation with industrial-grade rugged design. With its distinct competitive advantages of "small size, large zoom, high image quality, and high reliability," it stands as the preferred infrared imaging core component for premium applications including lightweight UAV inspection, high-end security surveillance, industrial precision inspection, and vehicle-mounted optoelectronic early warning systems—providing robust hardware support for miniaturized, high-precision, all-weather infrared detection systems.

    For inquiries regarding optical solutions tailored to specific detectors or custom lightweight infrared imaging systems for airborne, vehicular, or handheld platforms, please contact us via the information below. The Wh-Clear technical team is standing by to provide dedicated support.