People gaze at the moon on Mid-Autumn night, lost in its earthly radiance,

    but the romance that belongs uniquely to optoelectronic professionals

    is to see with infrared optics,

    to perceive a different set of radiation features on the lunar surface,

    and to unlock another kind of poetry in the universe.

01 Breaking Free from Human Vision, Viewing the Moon and Stars Anew

    Through the ages, the romance of Mid-Autumn has always been intertwined with the bright moon. Poets and writers poured their feelings into the moon; ordinary families looked up and longed for reunion. In everyone's mind, the moon is cool, bright, and soft as water — that is the visual form visible light gives to the moon.

    But that is not the whole picture.

    Human vision is limited: it mainly perceives sunlight reflected by celestial bodies, yet can hardly read a target's radiation information directly in the infrared band. This Mid-Autumn, we take a different viewing angle. With optoelectronic technology as our eye, and relying on the 88-1100mm F4.0 MWIR continuous zoom lens independently developed by Wh-Clear, we carry out ground-based imaging of a distant target such as the Moon, recording the radiation distribution features of the lunar surface in the 3-5μm band.

    Gone is the familiar silver moonlight; gone too is the neat outline of lunar maria (the dark plains). Every light and shadow in the image corresponds to a different state of radiation and temperature on the lunar surface.

02 Stripping Away the Moonlight Filter, Glimpsing Lunar Radiation

    This imaging uses the 3-5μm mid-wave infrared (MWIR) band, which is fundamentally different from visible-light imaging. Ordinary photography captures reflected light, whereas MWIR imaging captures the radiant energy of a target in the infrared band. For the moon, this is the combined result of reflected solar radiation and its own thermal radiation, with the proportion varying with surface temperature and illumination conditions — another presentation of its astrophysical state.

    Every detail in the image holds the codes of lunar geography and temperature:

· Bright regions: Areas fully exposed to sunlight, where reflection and thermal radiation act together, producing stronger infrared signals and a bright appearance in the image;

· Mottled dark regions and crater-like textures: The moon's surface is covered with impact craters of various sizes. Crater walls and floors receive light at different angles, creating clear temperature differences and radiation contrasts; low-temperature, low-radiation areas form the scattered patterns of light and dark;

· Central crosshair: The aiming marker of a professional optoelectronic observation system — an intuitive indicator of precise target locking and stable imaging.

    An infrared lunar image strips away the gentle filter bestowed by poetry, faithfully restoring the moon's original terrain — covered in craters and marked by distinct radiation. It lets us understand that the moon is not only poetic brightness, but also the rugged texture of the universe.

03 On the Wings of Optics, Capturing Distant Infrared Signals

    Ground-based long-range infrared observation is the ultimate test of optical equipment performance. Infrared signals attenuate markedly when penetrating the atmosphere, and long-range target signals are extremely weak; ordinary lenses struggle to achieve clear imaging. The successful presentation of this lunar infrared imaging demonstration relies on the comprehensive performance of the 88-1100mm F4.0 MWIR continuous zoom lens.

    Ultra-wide zoom range, switching between distant and close details at a touch

    The lens features an 88mm-1100mm continuous zoom design, balancing breadth and precision. The wide field of view of 6.2°×5.0° enables rapid search and locking of targets, while the 0.5°×0.4° ultra-narrow field of view at the telephoto end precisely magnifies local details of the lunar surface, clearly presenting the radiation features of tiny impact craters — achieving wide-area capture with high-precision observation.

    Large-aperture light transmission design, locking onto weak infrared signals

    The F4.0 large relative aperture optical structure greatly improves light transmission efficiency, effectively alleviating the challenges of long-range infrared signal attenuation and low signal-to-noise ratio. It efficiently collects weak radiation, helping maintain imaging clarity and stability in complex atmospheric conditions.

    Professional adaptation configuration, suited to high-precision detection scenarios

    The lens precisely adapts to 640×512, 15μm cooled MWIR detectors, paired with a 9.6mm×7.68mm standard image plane size and 19-20mm cold shield height, with excellent optical-to-detector F-number matching. It supports full-range focusing from 50m to infinity, enabling not only imaging demonstrations of distant targets such as the moon, but also precise long-range monitoring of various space targets.

    Fine craftsmanship, suited to complex outdoor scenarios

    Optical surfaces come standard with high-transmittance anti-reflection coatings, with customizable hard carbon coatings for excellent wear and interference resistance. The overall structure is optimized: a body of ≤14000g with compact dimensions balances structural stability and deployment flexibility, suitable for field use and ground-based fixed-station observation.

04 Technology Holds Romance, Chasing Light Toward the Full Moon

    The ancients gazed at the moon, expressing longing and hoping for reunion, describing the moonlit landscape with brush and ink; today we gaze at the moon, relying on technology and exploring deep space, unlocking the mysteries of the universe with optoelectronics.

    Visible light lets us see the moon's beauty; infrared technology lets us understand another language of the moon. From looking up at the stars to understanding them, every clear long-range image is a breakthrough in optical technology — and a romance unique to optoelectronic professionals.

    With deep roots in infrared optics, Wh-Clear always polishes every optical lens with a research attitude of relentless refinement, using cutting-edge technology to break through the limits of vision, explore the phenomena of the world around us, and capture every hidden beam of light and heat.

    The full moon arrives as promised; beauty is on its way.

    On this Mid-Autumn Festival, Wh-Clear wishes all partners, new and old customers, and all colleagues: a peaceful Mid-Autumn, a full moon and reunion, everything going smoothly, and wholeness and fulfillment year after year!