The precision 2D projector (also known as the optical image measuring instrument or 2D image measuring instrument) is a high-precision measuring device based on optical imaging and digital image processing, mainly used for non-contact measurement of planar dimensions, shapes and position tolerances. It plays a crucial role in industrial inspection and quality control, and is widely applied in fields such as precision manufacturing, electronic components, and mold processing.

1. Core functions and roles

(1) High-precision dimensional measurement

Length, width and diameter: Measure the geometric dimensions of tiny parts (such as PCB pads, gears, precision stamping parts), with an accuracy of ±1μm or even higher.

Angle and arc: Evaluate the machining accuracy of complex contours such as bevels, chamfers, and arcs.

Spacing and positional accuracy: Key parameters such as detection hole spacing, edge spacing, and concentricity.

(2) Shape and contour analysis

Straightness, roundness and parallelism: Analyze whether the workpiece meets the tolerance requirements of the design drawings (such as GD&T standards).

Complex contour comparison: By superimposing and comparing the CAD model with the actual image, processing errors are detected.

(3) Automated batch inspection

CNC programming measurement: Automatic positioning, focusing, and measurement, improving inspection efficiency (suitable for QC links in mass production).

SPC statistical analysis: Record measurement data, generate trend charts, and monitor production stability.

(4) Special applications

Transparent/reflective material measurement: Solve problems such as the reflection of glass and metal through special light sources (such as coaxial light, polarized light).

Microscopic structure detection: such as the microscopic dimensions of semiconductor leads, MEMS devices, and precision injection molded parts.

2. Key Technologies and advantages

High-resolution optical system

It adopts a 5-megapixel or higher CCD and a telecentric lens to reduce perspective errors and ensure clear imaging.

The multi-light source system (surface light, contour light, coaxial light) is suitable for workpieces of different materials.

(2) Precision motion control

The linear grating ruler (with a resolution of 0.1μm) ensures the accuracy of platform movement.

Autofocus technology: Laser or optical focusing to avoid human error.

(3) Intelligent software functions

Geometric element fitting: Automatically identify features such as circles, lines, and arcs.

OCR character recognition: Reading the engraved serial number or QR code on the product.

3D simulation display: Simulate three-dimensional contours through multi-angle measurement data (supported by some high-end models).

Precision 2D projection testing equipment is irreplaceable in high-precision and high-efficiency 2D dimension detection, especially suitable for small, complex or easily deformed workpieces. Combining automation and intelligent software, it has become one of the core tools for quality control in modern manufacturing.