Half-Mirror Lens Structure for Focused Light Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lens configurations result in reduced light reception by the light-receiving element due to light being reflected by a half mirror and not focused effectively, necessitating increased sensitivity and size of the light-receiving element.
Innovation Solution
A lens barrel-equipped lens configuration with a light-focusing portion that includes refraction portions, such as tapered and recessed surfaces, to refract and focus light reflected by a half mirror back towards the light-receiving element, enhancing light reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light is reflected by a half mirror without focusing, then the light-receiving element can monitor light intensity, but the quantity of light received is reduced requiring increased sensitivity and size
Solution Approach 1:
A light-focusing portion is introduced as an intermediary optical element between the half mirror and the light-receiving element. This focusing portion collects and concentrates the reflected light onto the light-receiving element, ensuring sufficient light quantity for monitoring while maintaining the half mirror's reflection function
Solution Approach 2:
The light-focusing portion utilizes a three-dimensional optical path design where light travels from the light source, reflects off the half mirror, passes through the focusing portion, and reaches the light-receiving element. This dimensional arrangement allows simultaneous achievement of light reflection for monitoring and light concentration for sufficient signal strength
2Quantity of substance
If the light-receiving element is increased in size to receive more reflected light, then light reception quantity improves, but the device size increases
Solution Approach 1:
The light-focusing portion acts as an optical mediator that concentrates reflected light onto a compact light-receiving element. This eliminates the need for a large light-receiving element while ensuring sufficient light quantity is received, thereby maintaining small device size
Solution Approach 2:
The invention changes the optical parameters by introducing a focusing mechanism that alters the light path and concentration. This allows the light-receiving element to maintain small physical dimensions while receiving adequate light through improved optical coupling rather than increased element size
3Measurement precision
If the light-receiving element sensitivity is increased to compensate for reduced light quantity, then measurement capability improves, but manufacturing cost and complexity increase
Solution Approach 1:
The light-focusing portion serves as an optical intermediary that solves the sensitivity problem by concentrating light before it reaches the light-receiving element. This allows the use of light-receiving elements with standard sensitivity levels rather than requiring high-sensitivity, complex, and expensive components
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 lens configuration increases the quantity of light received by the light-receiving element, allowing for a smaller device size and reduced sensitivity requirements, thus maintaining efficiency and reducing costs.
Implementation Method 1
The light-focusing portion is configured to focus light that is reflected by the half mirror and re-transmits through the lens, toward the light source
Implementation Method 2
a half mirror attached to the lens barrel and disposed to face the lens that is between the half mirror and the light source
Data Source
AI summary
A light source device includes a light source; a light receiver; a lens disposed on a light-emitting side of the light source; a lens barrel configured to retain the lens; and a half mirror attached to the lens barrel and disposed to face the lens. The lens includes a first lens surface facing the light source and a second lens surface facing the half mirror. The first lens surface includes a first portion configured to receive light from the light source and direct it to the half-mirror through the second lens surface, and a light-focusing portion provided in a region of the first lens surface outside the first portion, such light-focusing portion configured to focus light that is reflected by the half mirror towards the second lens surface and retransmitted through the lens, towards the light receiver.