A hybrid near-field-far-field spectrophotometer is used to measure the wavelength of light.

Abstract

OCR 26 / 03 / 2567 Hybrid near-field-far-field spectrophotometer A spectrophotometer is used to measure the wavelength of light by combining various phenomena. Near-field diffraction and far-field diffraction consist of: Light source (1) Cuvette (2) Optical expander (3) First grating (4), second grating (5), and the camera (6) by light from The source entering the spectrophotometer is irradiated through a cuvette (2) containing the solution to be The analysis shows that this solution absorbs light, and then the light is directed into parallel beams using a system of parallel lenses. (Optical expander) (3) then diffracts through the first grating (4) and short-range diffraction occurs. It therefore diffracts through the second grating (5) in a far-field diffraction manner and has Image sensor (6) Diffraction results of light to be used to analyze transmission and absorption of The light (absorbance) of the solution can be measured and the results displayed on a computer or... Microcontroller (7)

Claims

OCR 10KL (22 / 05 / 2568) 1. Hybrid near-field-far-field spectrophotometer. A spectrophotometer is used to measure the wavelength of light; it is a wavelength measuring instrument. The wavelength of light is based on a combination of near-field diffraction phenomena. diffraction) and far-field diffraction, which consists of a light source (Light) (1) Cuvette (2) Optical expander (3) First grating (4) The second grating (5) and the camera (6) have special characteristics, namely the light source (Light). (1) The light-emitting diode (LED) is installed at the very front of the device and is small in size, serving to direct light into the device. Hybrid near-field-far-field spectrophotometer spectrophotometer) in which the light source (Light) (1) is shone through the cuvette (2), where the cuvette (Cuvette) (2) is placed after the light source (Light) (1) and covers the entire beam so that the light from The light source (Light) (1) passes through the cuvette (2), in which the cuvette (2) serves to insert The solution to be analyzed and the light source (1) above is shone through the solution to be analyzed. The analyzer contained in the cuvette (2) will be able to absorb light from the light source (1) that enters it. After that, the light is bent into parallel beams and its size reduced by an optical lens system. expander) (3) which consists of two convex lenses at a distance between them equal to the sum of their focal lengths. Of the two lenses, the optical expander (3) is positioned after the cuvette. (Cuvette) (2) As soon as the light passes through the cuvette (2), all the light is reduced in size. After that, the light from the light source (Light) (1) passes through the optical expander (3) system. This smaller beam of light strikes and diffracts through the First grating (4), which is placed next to it. From the optical expander system (3) and placed in front of the grating perpendicular to the beam of light, which the grating The first grating (4) will act to cause diffraction in the near-passing field range through the first grating. The light then strikes and diffracts through the second grating (4). In the far-field diffraction type, the second grating (5) is also arranged vertically. The screen is also exposed to light and is positioned at a distance L? from the first grating (4) after the light has passed through. The second grating (5) will use any camera (6) to capture the diffraction effect of the light. This second grating (5) is placed behind the second grating (5) which the camera (6) will place. (5) is L2 distance. Long-range diffraction with a second grating (5) will produce diffraction fringes and Interference occurs on the image sensor of the camera (6), resulting in a streaky image. The varying degrees of light and dark intensity in the center of the image represent zero-order diffraction fringes. And the diffraction fringes of order 1 and above are located on the left and right sides of the 0-order diffraction fringe. Image analysis is performed to measure the light intensity of first-order diffraction fringes at different locations on the camera pixel. (Pixels) and the results are then used to calculate a spectrum of light at different wavelengths, which shows the spectrum of...

35. This light, emitted by a computer screen, exhibits a distribution of light intensity at different wavelengths that indicates the type of light being emitted. We want to measure the characteristics of the wavelength, specifically the different wavelength bands in the spectrum that are separated into colors. Different wavelengths of light are displayed on this (6) camera and when light of any wavelength is absorbed by the solution in the cue. Cuvette (2) The light of that wavelength disappears and can be calculated as the absorbance. The absorbance of light is displayed as a graph on a computer or microcontroller. (Microcontroller) (7) can be a computer (Computer) or microcontroller (Microcontroller) (7). It will be connected to the camera (6) via the USB port, and the images obtained from the camera will be transferred. It can analyze both the transmission and absorption of light of the sample solution. It is held in a cuvette (2) with precision by a near-far field composite spectrophotometer. A hybrid near-field / far-field spectrophotometer can display measurement results on a computer. (Computer) or microcontroller (7) with self-developed programs in the case of Microcontroller (7) works similarly to a computer but is smaller in size. Rather than a computer, it can therefore work by receiving the first-order diffraction wave image results from the camera. It can process data like a computer to determine the transmission and absorption of light. (Absorbance) of the sample solution in the cuvette (2) to determine which wavelengths it absorbs. The spectrum of light separated by the second grating (5) by the first grating (4) will be made The function is to make the diffraction marks obtained on the image sensor (6) sharper.

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