785nm Holographic Notch Filter For Raman Spectroscopy

Holographic notch filters are optical filters that selectively transmit light in a specific wavelength range while blocking the rest. These filters use a holographic recording process to create a periodic structure on a glass substrate, which causes destructive interference of the unwanted wavelengths.

The 785nm holographic notch filter blocks the laser light at the 785nm wavelength range. It is commonly used in Raman spectroscopy to stop the Rayleigh scattering of the laser light and improve the Raman spectra's signal-to-noise ratio.

UVWAVETEK is a professional manufacturer of notch filters that produces high-quality 785nm notch filters worldwide. The filter is highly efficient and has a high transmission rate of up to 90% for the desired wavelength. It is also durable and withstands high temperatures and humidity, making it an excellent choice for any laboratory or industrial setting.

Features

- Notch filter for NF785nm

- High attenuation

- Low insertion loss

- Adjustable wavelength

- Stable environmental coating

- ISO9001, RoHS certified

Parameters

Spectrum transmission curve

Applications

The 785nm holographic optical notch filter is commonly used in Raman spectroscopy to block the Rayleigh scattering of the laser light and improve the Raman spectra's signal-to-noise ratio. It is a crucial component in Raman spectroscopy applications that require the selective transmission of light in a specific wavelength range while blocking the rest.

The development history of Raman spectroscopy

Raman spectroscopy was discovered by Indian physicist Sir Chandrasekhara Venkata Raman in 1928. He found that a small fraction of the light is scattered in different directions when light shines on a material. Scattered light can change wavelength, which is known as the Raman effect. This effect can be used to analyze the chemical composition of a material. Raman spectroscopy has become a valuable tool in chemistry, physics, biology, and materials science.

Since its discovery, Raman spectroscopy has undergone significant development. In the 1960s, the invention of the laser significantly improved the sensitivity and resolution of Raman spectroscopy. In the 1970s, resonance Raman spectroscopy was developed, allowing the study of molecules' excited electronic states. In the 1980s, surface-enhanced Raman spectroscopy (SERS) was discovered, which significantly increased the sensitivity of Raman spectroscopy by several orders of magnitude.

Today, Raman spectroscopy is a widely used technique in various fields of science and technology. It is used in the pharmaceutical industry to analyze the purity of drugs, in forensic science to identify trace evidence, and in nanotechnology to study nanoparticles' properties. The development of Raman spectroscopy using a 785nm holographic notch filter significantly contributed to our understanding of materials' physical and chemical properties and has paved the way for many advancements in science and technology.

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