S16838-01MS silicon photodiode for Visible Light Intensity Measurement Color Identification & Sorting

1. Product Features:

• Visible-Light Focused Spectral Response: With a spectral response range of 320nm to 730nm and a peak sensitivity wavelength of 560nm (typical), it is specifically optimized for visible light detection. This narrow yet targeted waveband coverage ensures high specificity for visible light signals, avoiding interference from non-visible spectral regions (e.g., near-infrared) and improving detection accuracy in visible-light-only scenarios.
• Low Background Noise: The maximum dark current is 10pA, which is extremely low. Even in low-light or dark environments, it minimizes unwanted electrical signals generated by the sensor itself. This feature is critical for applications requiring precise measurement of weak visible light, as it reduces background interference and enhances the signal-to-noise ratio.
• Rapid Response Speed: The typical rise time is 2.5μs, enabling it to quickly capture dynamic changes in visible light signals. It can promptly convert transient or fast-fluctuating visible light (such as pulsed light sources in optical testing) into electrical signals, making it suitable for high-speed visible light detection tasks.
• Practical Photosensitive Area: Boasting a photosensitive area of 2.8×2.4mm, it balances light-capturing capability and compact size. The moderate area increases the probability of capturing visible light photons, especially for weak visible light sources, while still being small enough to integrate into miniaturized devices (e.g., portable colorimeters).
• Stray Light Shielding Design: The pre-molded plastic package is engineered to block stray light from the side and rear of the package from reaching the photosensitive region. This design prevents external non-target light (e.g., ambient infrared or side leakage light) from interfering with visible light detection, further ensuring the authenticity and accuracy of the measured signal.
• Easy Integration & Low System Cost: As an uncooled sensor, it does not require additional cooling systems (such as thermoelectric coolers), simplifying the overall device structure and reducing system cost. The plastic package is lightweight and easy to install via standard mounting methods, facilitating seamless integration into various electronic devices or test systems.

2. Product Applications:

• Visible Light Intensity Measurement: Widely used in handheld light meters, illuminance testers, and display brightness detectors. Its focused visible-light response and low dark current allow it to accurately measure the intensity of visible light in environments such as offices, classrooms, or display screens (e.g., LCD/LED monitors), meeting the needs of lighting quality assessment and display performance testing.
• Color Identification & Sorting: Applied in industrial color sorters (e.g., for sorting plastic particles, food grains, or pharmaceutical tablets) and colorimeters. By detecting the visible light reflection or transmission characteristics of objects at different wavelengths (within 320-730nm), it can distinguish subtle color differences, enabling automatic sorting of products by color or precise color matching in printing, textile, and paint industries.
• Portable Optical Testing Devices: Integrated into portable visible light spectrometers, fiber optic visible light power meters, and small-scale optical analyzers. Its compact size, rapid response, and uncooled design make these portable devices lightweight and easy to use on-site—for example, testing the visible light transmittance of glass in construction projects or measuring the output power of visible light LEDs in electronics manufacturing.
• Consumer Electronics Sensing: Used in consumer devices such as smart phone ambient light sensors (for adjusting screen brightness based on ambient visible light intensity) and smart home light controllers (for detecting visible light levels to trigger automatic lighting on/off). Its low power consumption (due to uncooled design) and high visible-light specificity align with the energy-saving and functional requirements of consumer electronics.
• Biomedical Visible Light Detection: Employed in low-cost biomedical devices like visible-light-based pulse oximeters (for preliminary blood oxygen detection via visible light absorption) or microbial culture light detectors (for monitoring the growth of light-sensitive microorganisms under controlled visible light conditions). Its low dark current and precise visible-light response ensure the reliability of biological signal measurement.

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