Hamamatsu PSD Technical Notes
Light point position, triangular ranging and position-sensitive detection principles; PSD hardware performance is not transferred to camera implementation
Verification date: 2026-10-24
View original public information →LSP256 · Fluid refraction and free liquid surface · Process fluid spray foam and crystallization
Partially reusable
Experiment on the influence of air flow on probe beam drift
Facing the airflow thermal disturbance device, the light spot timing and drift are used as the observation route, and the beam drift and time spectrum are planned 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/DeviceAir flow thermal disturbance device
Measure routeTIME · Light spot timing and drift
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
- Airflow thermal disturbance device: light spot timing and drift
- pseudo output
- Beam drift and time spectrum
- Applicable conditions
- cannot directly give the flow velocity or temperature field
- 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
Global shutter or known readout timing, saves timestamps, and exposures adapted to frequency of motion. Transparent flow channel or liquid surface reflection light path, temperature and geometric reference
TIME · Light spot timing and drift
Global shutter or known readout timing, saves timestamps, exposures fit to frequency of motion
- A22Kalman filter
- A25Welch power spectrum estimation
- A72Hampel median absolute deviation anomaly filtering
- A101Adaptive threshold laser spot grayscale centroid
- A107Laser spot quality and usability diagnostics
- A112Laser spot two-dimensional repeatability and coverage ellipse
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:Requires sampling rate/exposure verification, time synchronization and reference target camera motion compensation; not a substitute for laser Doppler vibrometers. The flow velocity or temperature field cannot be given directly. Liquid surface inclination, refraction and target translation need to be designed with identifiable optical paths
Route-level gaps:Requires sampling rate/exposure verification, time synchronization and reference target camera motion compensation; not a substitute for laser Doppler vibrometers
"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
Verify aliasing, phase, drift and frame loss with a known frequency shaker or encoder comparison. Standard refractive fluid, liquid level angle/height table cross test
| 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.
IBM Photothermal Deflectometry Research
The principle of probe beam deflection caused by refractive index gradient
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
Experiment on the influence of air flow on probe beam drift
Please describe the task object, original picture or video, target indicators, device platform, interface and sample situation.
Phone: 13910119357xuzhiyang0928@gmail.com