Machine Vision Industrial Lenses: Some Professional Terminology

Some professional terminology related to machine vision industrial lenses

In machine vision systems, the lens is akin to the human eye, primarily serving to focus the optical image of the target onto the photosensitive array of the image sensor (camera). All image information processed by the vision system is obtained through the lens, and the quality of the lens directly affects the overall performance of the vision system. Below is an explanation of the relevant professional terminology for machine vision industrial lenses.

Distortion

The distortion can be categorized into pillowtop and barrel distortion.

Television Distortion:

The percentage value calculated from the distorted shape of the actual side length to the ideal shape.

III. Optical Magnification

Four: Monitoring Amplification

Calculation Method:

VS-MS1+ 10x lens 1/2" CCD camera, image on a 14" monitor

A 0.1mm object is captured as a 44.45mm image on the monitor.

　　* Occasionally, based on the scan status of the TV monitor, the above simple calculation may vary slightly.

V. Resolution

Demonstrated an interval of 0.61x at the resolution of (λ)/ NA = (μ)

The calculation method described above can theoretically calculate resolution, but not distortion.

※ Using a wavelength of 550nm

Six: Resolution

1mm can be seen as the number of black and white lines. Unit (lp)/mm.

Section 7: MTF (Modulation Transfer Function)

Spatial frequency and contrast used to reproduce the intensity variations on the surface of objects during imaging.

Working Distance

Lens tube to object distance

O/I (Object to Imager)

Object-to-image distance refers to the length between the object and its image.

Section X: Imaging Circle

Please input the camera sensor size for the imaging diameter φ.

Eleven, Camera

　　C-mount: 1″ diameter x 32 TPI: FB: 17.526mm

　　CS-mount: 1″ diameter x 32 TPI: FB: 12.526mm

　　F-mount: FB:46.5mm

M72-Mount: Different manufacturers offer various FB mounts

Twelve: Field of View (FOV)

Field of view refers to the lateral range of objects visible after using a camera.

Camera Effective Area: Vertical Length (V) / Optical Magnification (M) = Field of View (V)

Camera Effective Area Horizontal Length (H) / Optical Magnification (M) = Field of View (H)

The field of view on technical documents refers to the value calculated from general numerical calculations of the light source and effective area.

The vertical length of the camera's effective area (V or H) is calculated by multiplying the size of a single pixel by the number of effective pixels (V or H).