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 →LSP249 · Fluid refraction and free liquid surface · Process fluid spray foam and crystallization
Need to add new core
Probe Deflection Recording of Fluid Refraction Changes
Facing the transparent flow channel, using transmission deflection and refraction inversion as the observation route, the deflection angle and time are 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/DeviceTransparent flow channel
Measure routeREFRACT · Transmission deflection and refraction inversion
Ability GradingNeed to add new core
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
- Transparent flow channel: transmission deflection and refraction inversion
- pseudo output
- Deflection angle and time
- Applicable conditions
- Temperature, bubbles and concentration changes can confuse
- priority
- Special development. The measurement/control core needs to be supplemented and verified according to the special project approval
Imaging input and algorithm routing
Imaging and device conditions
A transmission device for which the angle of incidence, optical path length, medium boundary and temperature are known. Transparent flow channel or liquid surface reflection light path, temperature and geometric reference
REFRACT · Transmission deflection and refraction inversion
Transmission device with known incident angle, optical path length, medium boundary and temperature
- A101Adaptive threshold laser spot grayscale centroid
- A103Logarithmic quadratic surface sub-pixel spot center
- A107Laser spot quality and usability diagnostics
- A111laser spot pixel to camera view angle conversion
- 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
Need to add new core
Need to add core computing
Light point extraction can only be used as an observation front-end, and core capabilities such as three-dimensional reconstruction, closed-loop control, wavefront or physical quantity inversion need to be developed and verified separately.
Gaps in this scenario:Snell/ray tracing and parameter identifiability analysis need to be added; deflection cannot uniquely prove composition or concentration. Temperature, bubbles and concentration changes can be confused. Liquid surface inclination, refraction and target translation need to be designed with identifiable optical paths
Route-level gaps:Snell/ray tracing and parameter identifiability analysis need to be added; deflection cannot uniquely prove composition or concentration
"New cores required" only describes the relative development volume and does not constitute a commitment to accuracy, tempo, stability or delivery time.
Verification methods and acceptance prerequisites
Examine geometry/composition cross-sensitivity using a known prism or refractive index reference medium and controlled temperature. 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
Probe Deflection Recording of Fluid Refraction Changes
Please describe the task object, original picture or video, target indicators, device platform, interface and sample situation.
Phone: 13910119357xuzhiyang0928@gmail.com