Distance measuring device and equipment
JP2024171857A5Pending Publication Date: 2026-06-03CANON KK
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- CANON KK
- Filing Date
- 2023-05-30
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
ToF distance measuring devices face challenges in accurately measuring distances when objects are out of focus and using large F numbers decreases light intake, leading to reduced measurement accuracy.
Method used
A distance measuring device with a focus drive unit that adjusts the optical system's focus during the distance measurement operation, ensuring the object is in focus within the depth of field by controlling the focus position based on the waiting time from light emission to exposure.
Benefits of technology
This approach enhances distance measurement accuracy by maintaining objects in focus over a wide range, preventing blurring and ensuring precise distance calculations.
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Smart Images
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Abstract
To provide a technique advantageous for improving distance measurement accuracy.SOLUTION: A distance measuring device comprises: a light source; a photoelectric conversion unit; an optical system for forming an image of an object that receives light emitted from the light source on the photoelectric conversion unit; and an operation unit for acquiring information on the distance to the object on the basis of an electric signal obtained through photoelectric conversion performed by the photoelectric conversion unit. The distance measuring device further comprises a focus driving unit that controls the focus driving of the optical system, and the focus driving unit performs the focus driving in a period for performing a distance measuring operation of measuring the distance to the object.SELECTED DRAWING: Figure 1
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