Low Distortion Lens – M401611005028F

M401611005028F is Low Distortion Lens 1/10″ Φ2.1 M4X0.25 mount CCTV lens with Built-In IR Filter, 60.5° diagonal F.O.V., F2.8 aperture, for security Surveillance.

1.6mm M4 Low Distortion Miniature Lens

This 1.6mm M4 low distortion miniature lens is designed for 1/10″ VGA imaging modules, delivering less than 1% TV distortion with a 60.5° diagonal field of view. Its 2.14mm total track length, F2.8 aperture, and compact 5.0 × 5.0mm holder make it suitable for space-constrained embedded cameras, miniature machine vision modules, and compact visual sensing equipment.

M4 Low Distortion Lens Core Highlights

• <1% TV Distortion: Maintains highly controlled image geometry for compact imaging systems.
• 1/10″ VGA Compatibility: Designed for small-sensor camera modules requiring compact optical integration.
• 2.14mm T.T.L.: Supports ultra-short optical paths in space-constrained camera designs.
• >50% Relative Illumination: Helps maintain useful brightness across the image field.
• 5.0 × 5.0mm Holder: Provides a compact mechanical footprint for embedded camera assemblies.

1.6mm M4 Low Distortion Lens Applications

Core Application Scenes

This 1.6mm low distortion miniature lens is designed for compact camera modules where controlled image geometry and small mechanical dimensions are key requirements. With TV distortion below 1%, the lens is particularly suitable for imaging applications where excessive barrel or pincushion deformation could affect visual measurement, object positioning, or downstream image processing.

The lens is optimized for 1/10″ VGA imaging systems, providing a 60.5° diagonal field of view, 50° horizontal field of view, and 39° vertical field of view. This balanced viewing angle gives compact cameras sufficient scene coverage without relying on the extreme geometric deformation associated with fisheye optics.

Its 2.14mm total track length makes the lens suitable for camera assemblies where the available optical installation depth is severely restricted. The 5.0 × 5.0mm holder also provides a compact mechanical footprint for embedded imaging equipment, miniature inspection devices, and robotic visual sensors.

The lens can be integrated into compact machine vision modules where image geometry needs to remain stable while the camera itself must occupy very little space. It is also suitable for OEM camera designs requiring a fixed optical configuration rather than a mechanically adjustable iris or zoom system.

Designed for low-distortion miniature machine vision and compact embedded imaging applications.

Compatible Device List

• 1/10″ VGA Camera Modules: Designed for compact image sensors with a maximum image circle of Φ2.1mm.
• Embedded Vision Cameras: The 2.14mm T.T.L. supports integration into thin camera modules with limited optical space.
• Miniature Machine Vision Modules: Suitable for compact inspection systems requiring controlled image geometry and VGA resolution.
• Robotic Vision Sensors: Can be integrated into compact robotic cameras where small optical dimensions and consistent imaging are important.
• OEM Camera Assemblies: The M4 × 0.25 mounting interface and 5.0 × 5.0mm holder support customized miniature camera designs.

Low-Distortion Imaging Performance

The primary optical advantage of this lens is its less-than-1% TV distortion. Such low distortion helps maintain more accurate image geometry and can reduce geometric correction requirements in downstream vision processing.

This makes the lens particularly relevant for compact systems that need moderate scene coverage without sacrificing image shape. Unlike a fisheye lens, which intentionally accepts substantial geometric distortion to achieve extreme field coverage, this design prioritizes controlled distortion and compact optical integration.

The lens also provides greater than 50% relative illumination, helping maintain usable brightness across the sensor. This characteristic is particularly relevant to miniature imaging modules where the sensor area is small and consistent illumination contributes to reliable image processing.

Engineers evaluating distortion requirements can refer to the Distortion Guide when determining whether a low distortion lens is appropriate for their imaging system.

Compact Optical Integration

With a 2.14mm T.T.L. and a 5.0 × 5.0mm holder, the lens is designed for highly compact camera architectures. Its short optical path allows system designers to reduce the depth required for the lens and camera assembly.

The 2P + IRCF construction provides a compact optical structure with an IR-cut filter configuration. The IRCF specification should not be interpreted as an IR-corrected optical design.

The C.R.A. below 30.2° should also be considered during sensor matching, particularly when integrating the lens into a customized camera module. For additional guidance on selecting the appropriate combination of sensor, focal length, field of view, and lens characteristics, engineers can refer to the Lens Selection Guide.

The expected field coverage can also be evaluated using the FOV Calculator before finalizing the camera installation geometry.

Frequently Asked Questions

Q: Is this a low distortion lens?
A: Yes. The lens has a specified TV distortion of less than 1%, making low distortion its primary optical characteristic.

Q: What sensor size is this 1.6mm lens designed for?
A: The lens is designed for a 1/10″ image format with a maximum image circle of Φ2.1mm and VGA resolution.

Q: What is the field of view of this lens?
A: The lens provides a 60.5° diagonal FOV, 50° horizontal FOV, and 39° vertical FOV based on the specified 1/10″ configuration.

Q: Is this lens a fisheye lens?
A: No. Its 60.5° diagonal FOV and less-than-1% TV distortion are more consistent with a low distortion miniature lens rather than a fisheye optical design.

Q: What is the total track length of the lens?
A: The T.T.L. is only 2.14mm, making the lens suitable for camera modules where optical installation depth is highly restricted.

Q: What mount does this lens use?
A: The lens uses an M4 × 0.25 mount and has a 5.0 × 5.0mm holder for compact camera integration.

Q: What does the >50% relative illumination specification mean?
A: Relative illumination above 50% indicates that the lens maintains a useful level of image brightness toward the edge of the sensor, supporting more consistent image quality across the frame.

Q: Does the IRCF specification mean this is an IR corrected lens?
A: No. The 2P + IRCF construction indicates an IR-cut filter configuration. It does not by itself indicate optical correction for infrared wavelengths. For customized camera integration, engineers can contact Towin Optical.

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