Coaxial Laser Ranging Optics With Beam-Splitting Prism Alignment
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Solution Overview
Problem
Existing monocular laser ranging devices suffer from non-coaxial transmitting and receiving optical paths, leading to measurement inaccuracies and the need for customized objective lenses with notches, which increase complexity and reduce portability.
Innovation Solution
A coaxial laser ranging device design with beam splitting prisms disposed along the main optical path, ensuring the transmitting and receiving paths are coaxial, allowing for precise distance measurement and visual observation without additional projection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the transmitting and receiving optical paths are arranged non-coaxially, then the device structure is simpler, but the measurement accuracy deteriorates
Solution Approach 1:
A beam splitting prism is introduced as an intermediary component to separate the transmitting and receiving optical paths while maintaining coaxial alignment. The prism divides the laser beam into transmitted and received portions, enabling accurate measurement without requiring complex non-coaxial arrangements.
Solution Approach 2:
The optical path is segmented into transmitting and receiving components using the beam splitting prism. This segmentation allows the laser beam to be divided into separate transmitted and reflected beam paths while maintaining overall coaxial alignment, resolving the contradiction between structural simplicity and measurement accuracy.
2Ease of operation
If a notch is provided in the objective lens to accommodate the transmitting lens barrel, then the transmitting path can be separated, but the manufacturing precision requirements increase
Solution Approach 1:
The transmitting lens barrel is extracted from the objective lens structure and positioned separately. The beam splitting prism enables the transmitting path to be taken out from the main optical axis, eliminating the need for notches in the objective lens and reducing manufacturing precision requirements.
3Volume of moving object
If the laser transmitter and receiver are disposed on the main optical path, then the structure is compact, but visual observation of the target is blocked
Solution Approach 1:
The beam splitting prism acts as an intermediary that redirects the laser beam away from the main optical path while allowing visible light to pass through to the objective lens. This enables compact positioning of the laser components without blocking the user's visual observation of the target.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The coaxial design improves measurement accuracy, reduces product size, and enables visual observation of targets while maintaining a large field of view, overcoming the limitations of non-coaxial designs.
Implementation Method 1
A laser beam emitted by the laser transmitter is partially refracted by one of the beam splitting prisms and converged into the main optical path
Implementation Method 2
the reflected laser beam is refracted to the laser receiver
Data Source
AI summary
A transmitting-receiving coaxial laser ranging device and an optical module are provided. The transmitting-receiving coaxial laser ranging device and the optical module optimize the structures and positions of a lens barrel, an objective lens, an ocular lens, an optical module, a laser transmitter, a laser receiver and other parts. The laser transmitter and the laser receiver are disposed on a side of a main optical path, but the objective lens, the ocular lens and two beam splitting prisms in the optical module are disposed on the main optical path. The beam splitting prisms are used to change optical paths of the emitted beam and the received beam, and the emitted beam and the received beam are ensured to be coaxial on the main optical path, such that the target can be aimed at more accurately and distance measurement is more precise, and the user can visually observe the target.