Light detector and light detection device

By combining avalanche photodiode units connected in parallel with multiple comparators, information for determining the light incident time with high precision is generated, solving the problem of excessive computational load in existing technologies and realizing high-precision light detection and ranging.

CN122460089APending Publication Date: 2026-07-24HAMAMATSU PHOTONICS KK
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HAMAMATSU PHOTONICS KK
Filing Date
2024-08-30
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing optical detection devices, the influence of ambient light and stray light causes excessive computational load on the time measurement unit, making it difficult to determine the incident time of light with high accuracy.

Method used

By employing multiple avalanche photodiode units connected in parallel, combined with multiple comparators and an energy monitoring unit, information for determining the light incident time with high precision is generated. This reduces the computational load by decreasing the amount of data in the time measurement unit and the energy information in the energy monitoring unit.

Benefits of technology

This achieves high-precision determination of the light incident moment while suppressing the computational load of the time measurement unit, thereby reducing power consumption and improving the accuracy of the ranging system.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122460089A_ABST
    Figure CN122460089A_ABST
Patent Text Reader

Abstract

The light detector (1) has a light detecting element (22), a comparison section (9), a time measuring section (11), and an energy monitoring section (12). The light detecting element (22) includes a plurality of APDs (4) that operate in a nonlinear region and are connected in parallel with each other. The comparison section (9) includes a plurality of comparators (16). The threshold values of the plurality of comparators (16) are different from each other. The time measuring section (11) outputs first information (A1) representing a time from a prescribed time until one output signal (SC) is input, based on one output signal (SC) among a plurality of output signals (SC) respectively output from the plurality of comparators (16). The energy monitoring section (12) generates second information (A2) representing an energy size of a light pulse incident to the light detecting element (22), based on the plurality of output signals (SC).
Need to check novelty before this filing date? Find Prior Art