What is a spectrometer？

The spectrometer is also known as the optical device, which is widely known as a direct reading spectrometer. Device with different wavelength positions of the optical detector of photoelectric bonding tube. It consists of one incident slit, a color dispersion system, a imaging system and one or more outline slit. The color scattered components separate the electromagnetic radiation of the radiation source out of the required wavelength or wavelength area, and determine the intensity on the selected wavelength (or scan a certain wave section). It is divided into two types: monochrome and multi -chroma.

Spectroscope is a scientific instrument that decomposes complicated ingredients into a spectral line. It is composed of prism or diffraction grating. The spectrometer can measure the light reflected by the surface of the object. The seven -color light in the sun is a part of the naked eye (visible light), but if the sunlight breaks down through the spectrometer and arranges according to the wavelength, the visible light only accounts for a small range in the spectrum. , UV, X -rays, and so on. Through the grasp of the light information, the film is displayed by the light, or the computer -based automatic display of the display and analysis of the value instrument is automatically displayed, so as to test what the items contain. This technology is widely used in the test of air pollution, water pollution, food hygiene, and metal industry.

Separate compound color into a spectral optical instrument. There are many types of spectrometers. In addition to the spectrometer used in the visible light wave segment, there are infrared spectrometers and ultraviolet spectrometers. According to the different scattered components, it can be divided into prism spectrometers, grating spectrometers and interference spectrometers. According to the detection method, there are spectrums that are directly observed with the eye, the spectrometer recorded with a sensor, and the spectrophotic optical meter of the spectral spectrum with optoelectronic or thermoelectric components. The monochrome is a spectral instrument that only outputs the monochrome line through the slit, which is often used with other analytical instruments.

According to the working principle of modern spectral instruments, spectrometers can be divided into two categories: classic spectrometers and new type spectrometers. The classic spectrum instrument is an instrument built on the principle of spatial color scattered; the new spectrum instrument is an instrument built on the principle of modulation. The classic spectrum instruments are all slit spectrum instruments. The preparation spectrometer is non -spatial light, and it uses a round hole inlet.

According to the spacing principle of scattered components, the spectrum instrument can be divided into: prism spectrometer, diffraction grating spectrometer and interference spectrometer. OMA (Optical Multi-Channel Analyzer) is an optical detector (CCD) and computer-controlled new spectral analysis instruments in the past ten years. It integrates information collection, processing, and storage functions. Because OMA no longer uses sensitive latex, avoiding and saving the dark room treatment and a series of tedious processing in the subsequent, measurement work has fundamentally changed the traditional spectral technology, greatly improved the work conditions, and improved work efficiency; OMA uses OMA Analyze the spectrum, the measurement is accurate, fast, convenient, and high sensitivity, fast response time, high spectrum resolution. The measurement results can be immediately read from the display or printer to output from the printer. It is widely used in almost all spectral measurements, analysis and research work, and is particularly adapted to the detection of weak signals and transient signals.

A typical spectrometer consists of an optical platform and a detection system. Including the following main parts:

1. Enter slits: Form the spectrometer imaging system of the system under the illumination of incident light.

2. Direct component: turn the light from the slit into parallel light. The quasi -line can be an independent lens, reflector, or directly integrated on the color scattered element, such as the concave surface grating in the concave grating spectrometer.

3. Color scattered components: Raiders are usually used to make the light signal scattered into multiple beams in space in the space.

4. Focus component: Focus on the beam after color scattered, so that it forms a image of a rated slit on the focus plane, each of which corresponds to a specific wavelength.

5. Detector array: placed on the coke plane to measure the strength of the wavelength of each wavelength. The detector array may be the CCD array or other types of light detectors.