CORRECT FVL-2X-65D-CA-LED | Coaxial Telecentric Industrial Lens Assembly

Description

Core Product Summary (Brand / Model / Key Attributes)

The CORRECT FVL-2X-65D-CA-LED is an industrial telecentric lens assembly designed by CORRECT / Seiwa Optical for high-precision machine vision, defect inspection, and automated optical alignment systems. Featuring a fixed 2.0x optical magnification, a 65 mm working distance, and integrated coaxial LED illumination, this compact optical assembly delivers high-resolution, low-distortion imaging of specular, reflective, and patterned surfaces.

Designed to interface with C-mount machine vision cameras supporting sensor formats up to 2/3 inch, the FVL-2X-65D-CA-LED incorporates an internal beam splitter and integrated point-light LED source. This configuration projects illumination along the optical axis, eliminating directional shadows and enhancing edge contrast on silicon wafers, semiconductor dies, glass substrates, and machined metal components. The telecentric optical design maintains consistent image magnification across small object displacement along the optical axis.

Key Technical Specifications

Detailed Product Overview

The CORRECT FVL-2X-65D-CA-LED combines telecentric optical optics with coaxial LED illumination into a single assembly for precision industrial measurement and visual inspection tasks. Engineered to meet the demanding requirements of automated optical inspection (AOI) equipment, semiconductor wafer alignment, and high-resolution micro-assembly systems, the lens provides clear, high-contrast imagery at a fixed 2.0x primary magnification.

The defining characteristic of the FVL-2X-65D-CA-LED is its coaxial illumination port and integrated point LED light source. By routing light directly through the optical path using an internal beam splitter, illumination hits the target subject perpendicular to the lens surface. This design eliminates shadows caused by surface relief and highlights fine surface defects, micro-cracks, polished metal features, and metallic traces on circuit boards or glass substrates.

With a fixed working distance of 65 mm, the assembly maintains a compact form factor suitable for integration into tight space-constrained inspection stations and pick-and-place machinery. The telecentric optical design ensures that perspective errors are minimized, keeping feature dimensions consistent even if the target object shifts slightly in distance along the Z-axis.

Engineering Selection Highlights

• 2.0x Fixed Telecentric Magnification: Provides constant image size across depth-of-field ranges, critical for precision measurement and pattern-matching algorithms.
• Integrated Coaxial Point LED: Directs illumination parallel to the optical axis, making it effective for flat reflective, polished, or glass surfaces.
• Compact 65 mm Working Distance: Allows installation into automated manufacturing equipment with limited physical clearance above the target.
• Standard C-Mount Interface: Threaded C-mount coupling ensures broad compatibility with standard industrial machine vision cameras up to 2/3-inch sensor size.
• Low Distortion Optics: Preserves spatial integrity across the entire field of view, minimizing software calibration overhead for edge detection and alignment.

FVL-2X-65D-CA-LED

FVL-2X-65D-CA-LED

System Compatibility & Integration Requirements

Dimensions, Mounting & Connection Notes

The CORRECT FVL-2X-65D-CA-LED features a cylindrical body designed for barrel clamping using standard machine vision mounting blocks or precision alignment stages. The optical center maintains a fixed 65 mm clearance between the front objective lens element and the focal plane of the target object.

Camera connection is established via standard threaded C-mount (1-inch diameter, 32 threads per inch) with a back focal distance of 17.526 mm. The integrated coaxial LED module features a standard connector lead for coupling to an external LED lighting power supply. When integrating into automated machinery, ensure the lens barrel is supported near its center of gravity to prevent strain on the camera lens mount under high-vibration conditions.

FAQ

What is the CORRECT FVL-2X-65D-CA-LED?

It is an industrial telecentric optical lens assembly featuring 2.0x fixed magnification, a 65 mm working distance, and an integrated coaxial LED light source.

What does coaxial illumination mean on this lens?

Coaxial illumination routes light directly through the lens optical axis via an internal beam splitter, illuminating the target perpendicular to the lens to eliminate shadows on flat, reflective surfaces.

What camera mount does the FVL-2X-65D-CA-LED use?

It uses a standard C-mount camera interface.

What maximum sensor size does this lens support?

The lens supports industrial camera sensor formats up to 2/3 inch.

What is the working distance of the lens?

The lens operates at a fixed working distance of 65 mm from the front objective element to the target object.

How is the LED light powered?

The integrated point-source LED connects via an external power cable to a compatible DC lighting power controller.

Verification & Troubleshooting Notes

1. Illumination & Light Output Checks: If coaxial illumination fails to light, check the cable connection between the point LED connector and the external LED driver, ensuring correct DC voltage and polarity settings.
2. Focus & Image Clarity Adjustments: Verify that the distance between the front element of the lens and the target object is set to 65 mm. Telecentric lenses require precise axial positioning to achieve optimal focus.
3. Dust & Reflection Artifact Inspection: If spot artifacts or uneven illumination appear in the image, inspect the coaxial beam splitter port and front glass element for dust or smudges; clean using optical-grade lens cleaning wipes and filtered compressed air.
4. Camera Sensor Alignment: Ensure the C-mount thread is fully seated against the camera housing to prevent tilt, which can degrade edge sharpness across the field of view.