Variable Entrance Slit Spectrometer Using Spatial Modulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spectrometers face challenges in quickly and precisely adjusting the entrance slit width due to mechanical complexity and low speed, which affects the balance between spectral resolution and light yield, especially in low-light applications.
Innovation Solution
Implementing a variable entrance slit using a spatial modulation element with independently controllable pixels, such as a micro-mirror array or liquid crystal display, allowing for precise and flexible adjustment of the slit width and shape during operation to optimize resolution and light yield based on the measurement situation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the slit width is reduced to increase spectral resolution, then the spectral resolution is improved, but less light enters the spectrometer resulting in reduced light yield
Solution Approach 1:
The patent applies dynamics by making the entrance slit width adjustable and variable during operation. The control unit can dynamically change the slit width based on measurement requirements, allowing optimization between spectral resolution and light yield for different measurement situations. This is achieved through a variable slit structure that can be electronically controlled to open or close the slit aperture.
Solution Approach 2:
The patent changes the physical parameter of slit width to resolve the contradiction. By varying the slit width parameter, the system can achieve high spectral resolution when needed (narrow slit) while maintaining high light yield when possible (wide slit). The control unit adjusts this parameter dynamically based on the measurement task at hand.
2Manufacturing precision
If mechanical adjustment mechanisms are used to control slit width, then precise slit width control is achieved, but the device complexity increases and adjustment speed decreases
Solution Approach 1:
The patent replaces mechanical adjustment mechanisms with an electronically controlled system. Instead of using motorized micrometer screws or manual disc changes, the invention uses a control unit that electronically actuates the slit aperture. This substitution eliminates complex mechanical transmission components while maintaining precise control capability through electronic actuation.
Solution Approach 2:
The control unit automatically controls the slit width based on measurement requirements without requiring manual intervention. The system can autonomously adjust the slit aperture to optimal settings, eliminating the need for operator interaction with mechanical adjustment mechanisms and reducing operational complexity.
3Manufacturing precision
If mechanical adjustment mechanisms are used to control slit width, then slit width can be set precisely, but the adjustment speed is slow
Solution Approach 1:
The patent replaces slow mechanical adjustment mechanisms with fast electronic control. The electronic actuation system can change slit width almost instantaneously by applying electrical signals to control the aperture, eliminating the inertia and mechanical transmission delays inherent in motorized or manual adjustment systems.
Solution Approach 2:
The patent implements dynamic slit width control that can respond rapidly to changing measurement conditions. The electronically controlled slit can be opened or closed quickly, allowing the system to adapt to different measurement scenarios in real-time without the speed limitations of mechanical systems.
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
Enables rapid and precise adjustment of the slit width and shape, improving the overall measurement characteristics of the spectrometer by optimizing resolution and light yield according to the measurement situation, enhancing the spectrometer's ability to analyze light samples effectively.
Implementation Method 1
the light of a light sample in a spectrometer is broken down into its spectral components by a dispersive element, such as an optical grating
Implementation Method 2
the entrance slit can be implemented by a first reflecting or transmitting spatial modulation element including a plurality of separately controllable pixels
Data Source
AI summary
A spectrometer including at least one light-coupling element, a variable entrance slit, a dispersive element, a detector element and a control and evaluation unit. The object of providing a spectrometer having improved measuring characteristics is achieved in that the variable entrance slit is implemented by a first spatial modulation element including a plurality of pixels, wherein the individual pixels can be arranged independently of one another by the control and evaluation unit, wherein the individual pixels are arranged in order to implement the entrance slit during operation in such a manner that at least part of the light incident from the light-coupling element is passed on to the dispersive element.