the detection and measurement of infrared radiation pdf

The detection and measurement of infrared radiation pdf

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Published: 03.06.2021

Applied Optics

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Introduction

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Applied Optics

The detection of infrared radiation is of great interest for a wide range of applications, such as absorption sensing in the infrared spectral range. In this work, we present a CMOS compatible pyroelectric detector which was devised as a mid-infrared detector, comprising aluminium nitride AlN as the pyroelectric material and fabricated using semiconductor mass fabrication processes. The detectors have been tested at a wavelength close to the CO 2 absorption region in the mid-infrared. Devices with various detector and membrane sizes were fabricated and the influence of these dimensions on the performance was investigated. The noise equivalent power of the first demonstrator devices connected to a readout circuit was measured to be as low as 5.

Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Surface detection and recognition using infrared light Abstract: This article deals with surface detection and recognition, using infrared light. This non-intrusive method could be implemented to detect different types of surfaces and objects. The article describes measuring device, methods and results obtained in the experiment, showing simplicity and suitability in many everyday applications.

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Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Far-infrared radiation FIR exerts numerous beneficial effects on health and cell physiology.

The article describes an optical method for detecting radiation in the far infrared region of the spectrum against the thermal noise background with an uncooled photodetector PD that is relevant for the field of indicator sensors. The article considers the mechanism of the appearance of photocurrent components in a heterojunction during the absorption of long-wave radiation and their ratio. A measurement of the photocurrent in PD by incorporating a heterojunction into a bridge circuit is proposed. An analytical description of the dependence of the loop currents on the elements of the equivalent heterojunction circuit and the bridge measurement circuit is given. It is established that the functional dependences of the photocurrent components through the structural elements of the heterojunction are opposite in sign and intersect at the point of equality of their values. The method makes it possible to divide the currents in the heterojunction layers, calculate or set the current reference value by adjusting the measuring circuit and to provide the measurement of the photocurrent that is less than the thermal background in magnitude.

Solar radiation is radiant electromagnetic energy from the sun. It provides light and heat for the Earth and energy for photosynthesis. This radiant energy is necessary for the metabolism of the environment and its inhabitants 1. The three relevant bands, or ranges, along the solar radiation spectrum are ultraviolet, visible PAR , and infrared. Each of these bands has a different impact on the environment.

Introduction

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Infrared waves, or infrared light, are part of the electromagnetic spectrum. People encounter Infrared waves every day; the human eye cannot see it, but humans can detect it as heat. A remote control uses light waves just beyond the visible spectrum of light—infrared light waves—to change channels on your TV.

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