High-speed sensing for automated systems

December 3, 2025 /SemiMedia/ — ROHM has introduced the RPR-0730, a compact reflective optical sensor designed to deliver high-speed analog detection for industrial automation and printing equipment. The device targets applications that require precise identification of fast-moving or fine objects, including label printers, conveyor systems and inspection machinery.

As automation expands across factory and office environments, equipment makers are demanding more accurate sensing for material handling and print-position control. ROHM said the RPR-0730 extends its existing lineup beyond the digital-output RPR-0720 series, offering a higher-speed analog option for systems that need faster feedback and finer object recognition.

VCSEL-based design improves detection accuracy

The new sensor integrates an infrared VCSEL emitter, which provides stronger directionality than conventional LEDs and enables detection of features as narrow as 0.1 mm. Paired with an analog-output phototransistor, the device achieves a response time of 10 microseconds, supporting high-speed print detection and rotational sensing in motors and gears.

Compact package enhances integration flexibility

The RPR-0730 uses a 2.0 mm × 1.0 mm × 0.55 mm package and incorporates a resin that filters visible light to suppress ambient light interference. ROHM said this allows reliable operation in environments with fluctuating light conditions, such as production lines or semi-outdoor systems. Its small footprint also helps manufacturers integrate the sensor into compact mechanisms and precision instruments.

Mass production began in October 2025, with sample units priced at $2.2 each before tax.