16mm Tapered Cone Lens

Product Brief:

The PL-1645F-M12 from BOSHI Optical Technology is a compact 16mm focal length, F4.5 aperture fixed-focal lens engineered specifically for 1/2" format sensors. Designed with a 4-glass-element all-glass construction, this M12-mount lens delivers a 28.3° diagonal field of view and supports a maximum image circle of Ø8.5mm, making it an ideal match for 1/2" and smaller imagers in space-constrained vision systems. With a mechanical back focal length of 3.65mm and total track length of just 28.65mm, the PL-1645F-M12 integrates seamlessly into board-level camera modules for industrial inspection, biometric identification, and embedded imaging applications. BOSHI Optical Technology has optimized this 16mm F4.5 lens for superior edge-to-edge illumination, achieving 95% relative illumination and ultra-low TV distortion of -0.25%, ensuring faithful image reproduction even in high-contrast scenes. The chief ray angle is strictly controlled below 8°, minimizing vignetting and color shift when paired with modern CMOS sensors. Whether used in factory automation, logistics barcode readers, or medical imaging devices, this 1/2" sensor lens offers a balanced blend of resolution, compactness, and cost-effectiveness. Trust BOSHI Optical Technology to deliver reliable optical performance for your next-generation vision product, with the PL-1645F-M12 setting the benchmark for precision in the M12 lens category.

Product Detailed Description:

1. Detailed Parameter

Focal Length (EFL): 16mm ±5% - Provides a moderate telephoto perspective, ideal for object recognition at working distances between 100mm and 2000mm.

Aperture (F/NO): F4.5 ±5% - Balances light throughput with depth of field, suitable for indoor and well-lit outdoor environments without sacrificing resolution.

Optical Construction: 4G (all-glass elements) - Ensures thermal stability, high transmittance, and resistance to environmental degradation compared to hybrid plastic-glass designs.

Image Circle: Ø8.5mm max - Fully covers 1/2" sensors (diagonal ~8mm) and is backward compatible with 1/2.3" and 1/3" formats.

Mechanical Back Focal Length: 3.65mm ±0.2 - Allows straightforward integration with standard M12 sensor boards and optional IR-cut filter holders.

Total Track Length: 28.65mm ±0.3 - Ultra-compact profile for miniaturized cameras in drones, handheld devices, and surveillance nodes.

TV Distortion: -0.25% - Nearly invisible barrel distortion, critical for measurement and OCR applications.

Relative Illumination: 95.0% - Exceptional uniformity, reducing the need for flat-field correction in post-processing.

CRA (Chief Ray Angle): <8°- Matches the microlens array of most Sony, ON Semi, and OmniVision 1/2" sensors, preventing color shading.

Mount: M12×P0.5 - Industry-standard thread for quick interchangeability and active alignment.

2. Performance Advantages

High Uniformity & Low Distortion: The 95% relative illumination and -0.25% distortion ensure that the 16mm focal length F4.5 aperture lens produces geometrically accurate images with minimal falloff, reducing algorithmic correction overhead in machine vision pipelines.

Optimized CRA for Modern Sensors: With a chief ray angle below 8°, this 1/2" sensor lens eliminates peripheral color artifacts, enabling consistent white balance and color fidelity across the entire field - a critical advantage for facial recognition and color-based sorting.

All-Glass Ruggedness: The 4G construction resists focus shift due to temperature fluctuations (-20°C to +70°C), making the M12 mount industrial lens reliable in factory floors, outdoor kiosks, and automotive ancillary cameras.

Compact Mechanical Design: At just 28.65mm in length, it fits into slim enclosures while the 3.65mm BFL provides ample space for cover glass or filter stacks, simplifying mechanical design for system integrators.

Plug-and-Play Compatibility: The M12 thread and standard back focal distance allow direct replacement of existing lenses without mechanical redesign, reducing time-to-market for camera OEMs.

3. Application Domain

Industrial Machine Vision: The 16mm F4.5 configuration excels at defect detection on production lines (e.g., PCB inspection, surface scratch analysis) where moderate magnification and low distortion are paramount.

Biometrics & Access Control: The 1/2" sensor lens delivers sharp iris and facial features at 30-50 cm working distances, while the <8° CRA ensures compatibility with NIR-enhanced sensors for active IR illumination.

Logistics & Barcode Reading: The 28.3° FOV and high relative illumination enable reliable decoding of 1D/2D codes across varying package sizes, even under uneven lighting.

Embedded OEM Systems: From drone obstacle avoidance to medical endoscopy, the M12 mount lens offers a proven form factor for volume production, with BOSHI Optical Technology providing full optical and mechanical documentation for rapid integration.

Smart Retail & Shelf Monitoring: The low distortion profile supports accurate product dimension estimation and planogram compliance, while the compact housing fits into discreet ceiling-mounted or shelf-edge cameras.