Micro-Epsilon Laser Triangulation Principle
Transmitting, receiving imaging and distance measurement after calibration
Verification date: 2026-10-24
View original public information →LSP079 · Electronic and semiconductor assembly height · PCB blank board and electronic assembly
Partially reusable
Gasket thickness candidate measurement before and after press installation
Facing the thermal pad assembly, the differential measurement of both sides/reference surface is used as the observation route, and the differential thickness of the reference surface is intended to be output. The page is for project evaluation and does not mean that the development has been completed or has been accepted on site.
Project Judgment Summary
Product/DeviceThermal pad assembly
Measure routeTHICK · Bilateral/reference surface differential measurement
Ability GradingPartially reusable
Verification statusThe actual machine/product domain acceptance of this scenario has not been carried out
Scene nature:Similar potential application scenarios for laser spots. The potential application scenario has not yet been developed into a complete product system; the actual machine/product domain acceptance of this scenario has not been carried out. The actual product/product domain acceptance quantity in catalog statistics is 0.
Business tasks and intended output
- target audience
- Thermal Pad Assembly: Bilateral/Reference Surface Differential Measurement
- pseudo output
- Reference surface differential thickness
- Applicable conditions
- Compression rebound and substrate warpage need to be recorded simultaneously
- priority
- General extension. Verification needs to be completed according to the listed optical conditions, calibration and samples.
Imaging input and algorithm routing
Imaging and device conditions
Synchronized bilateral point displacement heads, or single head with a known stable reference plane. Fixed baseline point laser receiving head and calibration Z platform
THICK · Bilateral/reference surface differential measurement
Synchronous bilateral point displacement heads, or single head with a known stable reference surface
- A97Weighted least squares linear calibration
- A100First-order sensitivity uncertainty propagation
- A101Adaptive threshold laser spot grayscale centroid
- A103Logarithmic quadratic surface sub-pixel spot center
- A107Laser spot quality and usability diagnostics
Existing algorithmic evidence:A101–A112 only complete analytical synthesis spot and controlled geometry verification; see laser_spot_benchmark.json
Current capabilities and capabilities to be supplemented
Partially reusable
Requires calibration, synchronization or integration
The light point detection front-end or timing statistics module can be reused, but the project still needs to add geometric calibration, time synchronization, motion compensation or equipment system integration.
Gaps in this scenario:Point laser distance calibration, collinearity/synchronization and reference spacing models on both sides are required; the height of a single point is not directly equal to the thickness. Compression rebound and substrate warpage need to be recorded simultaneously. The surface reflection of the actual machine and the small measuring range determine whether the effective point can be collected.
Route-level gaps:Point laser distance calibration, collinearity/synchronization and reference spacing models on both sides are required; the height of a single point is not directly equal to the thickness
"Partially reusable" only describes the relative development volume and does not constitute a commitment to accuracy, tempo, stability or delivery time.
Verification methods and acceptance prerequisites
Use standard thick slices and warped samples to compare, and change the inclination angle and motion phase to check the differential error. Gauge block, microscopic height gauge and independent assembly sample comparison
| Acceptance items | Evidence required for project confirmation | Current status |
|---|---|---|
| Inputs and samples | Real device original frames, normal/abnormal samples, exposure and light path conditions, sample grouping and set aside | Not provided, waiting for project input |
| Magnitude and Error | Independent reference value, calibration record, error statistical caliber and mutual confirmation threshold | Not verified |
| Exceptions and boundaries | Anticipated handling of missed detections, false detections, overexposure, occlusion, reflection, out-of-view and communication abnormalities | To be defined |
| System integration | Interface, time synchronization, deployment platform, tempo, log, version and continuous running record | Not integrated |
Evidence sources and citation boundaries
The source supports measurement principles or similar applications; the module combination, device and acceptance method in this scenario are engineering derivation, and product verification has not been completed.
Micro-Epsilon displacement applications
Industrial height, distance and position measurement categories
Verification date: 2026-10-24
View original public information →NIST 3D Imaging Technology Description
Active point triangulation, scanned geometry and error propagation
Verification date: 2026-10-24
View original public information →Source usage scope:The public information is used to support the measurement principle or the existence of similar applications, and does not prove that this scenario has been developed, deployed or accepted by Jishi Technology.
Project consultation
xuzhiyang0928@gmail.com
Define the Development Scope with Samples and Device Requirements
Gasket thickness candidate measurement before and after press installation
Please describe the task object, original picture or video, target indicators, device platform, interface and sample situation.
Phone: 13910119357xuzhiyang0928@gmail.com