Distance Measurement Device Optical Axis Variation Control
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Solution Overview
Problem
Existing distance measurement devices face challenges in maintaining the accuracy of directional light irradiation due to variations in the optical axis of the image formation optical system and directional light, leading to shifting of the irradiation position, especially when the optical axis of the image formation optical system does not coincide with the optical axis of the directional light.
Innovation Solution
A distance measurement device with a light receiving section, an emission unit, a detection unit, a first reduction unit for image formation optical system variations, a second reduction unit for directional light variations, and a control unit that synchronizes both reduction units to maintain the irradiation position accuracy by controlling the optical axis variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an image shake reduction mechanism is applied to reduce image shake, then image stability is improved, but laser irradiation position accuracy deteriorates due to laser shake
Solution Approach 1:
The patent divides the shake reduction function into two independent units: an image shake reduction unit that stabilizes the subject image, and a laser shake reduction unit that stabilizes the laser irradiation position. This segmentation allows each unit to optimize its function independently, resolving the contradiction between image stability and laser positioning accuracy.
Solution Approach 2:
The patent introduces a laser shake reduction unit as an intermediary component that specifically addresses laser axis variation. This unit acts as a mediator between the image shake reduction mechanism and the laser emission system, compensating for laser shake independently to maintain irradiation position accuracy while the image shake reduction unit maintains image stability.
2Device complexity
If the optical axis of the image formation optical system does not coincide with the optical axis of the directional light, then device structure is simplified, but irradiation position accuracy deteriorates due to differential optical axis variation
Solution Approach 1:
The laser shake reduction unit serves as an intermediary that compensates for the differential variation between non-coincident optical axes. By independently controlling the laser beam position relative to the subject, this unit eliminates the negative impact of optical axis non-coincidence on irradiation position accuracy while maintaining the simplified device structure.
Solution Approach 2:
The patent dynamically adjusts the laser beam parameters (position and angle) through the laser shake reduction unit to compensate for optical axis variations. By changing these parameters in real-time based on detected shake, the system maintains accurate irradiation positioning despite the non-coincident optical axes configuration.
Data Source
AI summary
A distance measurement device includes an emission unit, a detection unit, a first reduction unit that reduces, based on a detection result of the detection unit, influence of variation of an optical axis of the image formation optical system on the subject image received as light by the light receiving section, a second reduction unit that reduces variation of an optical axis of the directional light with respect to the subject based on the detection result of the detection unit, and a control unit that, in the case of operating the first reduction unit and the second reduction unit at the same time, controls the first reduction unit and the second reduction unit to reduce variation of an irradiation position of the directional light in the subject image received as light by the light receiving section.