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Related Concept Videos

Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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Related Experiment Video

Updated: Jun 15, 2026

Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities
09:12

Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities

Published on: April 22, 2013

Ray tracing through funnel concentrator optics.

C W Chen, G W Hopkins

    Applied Optics
    |March 4, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a ray tracing method for funnel concentrators, which are proposed solar energy collectors. The procedure accurately tracks light rays for improved solar energy collection efficiency.

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    Last Updated: Jun 15, 2026

    Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities
    09:12

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    Published on: April 22, 2013

    Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional &#960;-conjugate Systems
    09:57

    Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems

    Published on: February 10, 2020

    Area of Science:

    • Solar energy engineering
    • Optical physics
    • Geometric optics

    Background:

    • Funnel concentrators offer potential for efficient solar energy collection.
    • Accurate ray tracing is crucial for designing and optimizing solar concentrators.
    • General toroids derived from parabolic or elliptical surfaces are key geometric forms for these concentrators.

    Purpose of the Study:

    • To develop and present a procedure and equations for tracing rays through funnel concentrators.
    • To analyze the optical performance of general toroidal solar concentrators.
    • To provide a method for evaluating the effectiveness of proposed solar energy collection designs.

    Main Methods:

    • Development of a ray tracing procedure for meridional and skew rays.
    • Application of an iterative technique for ray path calculation.
    • Exact tracing of rays to tangent conical surfaces on the concentrator.

    Main Results:

    • The presented procedure and equations enable accurate ray tracing in complex funnel concentrator geometries.
    • The method accounts for both meridional and skew rays, providing a comprehensive analysis.
    • Validation of the iterative technique for tracing rays through toroidal surfaces.

    Conclusions:

    • The developed ray tracing method is effective for analyzing proposed funnel solar concentrators.
    • The procedure facilitates the design and optimization of solar energy collection systems using toroidal concentrators.
    • This work contributes to the advancement of solar energy technology through precise optical analysis.