Spectrophotometer: Principle, Parts, Types, and Uses - laboratory spectrophotometer

 2024-09-18 08:46:51

Abstract: DLC coatings have attracted an enormous amount of interest for science and engineering applications. DLC occurs in several different kinds of amorphous carbon materials. Owing to the extensive diversity in their properties, DLC coatings find applications in mechanical, civil, aerospace, automobile, biomedical, marine, and several other manufacturing industries. The coating life of DLC is predominately influenced by its constituent elements and manufacturing techniques. Numerous researchers have performed multiple experiments to achieve a robust understanding of DLC coatings and their inherent capabilities to enhance the life of components. In this review, a wide range of DLC coatings and their classification, properties, and applications are presented. Their remarkable performance in various applications has made DLC coatings a promising alternative over traditional solitary-coating approaches. Keywords: DLC; coating; low friction; DLC applications; DLC properties; DLC classifications

Rajak DK, Kumar A, Behera A, Menezes PL. Diamond-Like Carbon (DLC) Coatings: Classification, Properties, and Applications. Applied Sciences. 2021; 11(10):4445. https://doi.org/10.3390/app11104445

Rajak, D. K., Kumar, A., Behera, A., & Menezes, P. L. (2021). Diamond-Like Carbon (DLC) Coatings: Classification, Properties, and Applications. Applied Sciences, 11(10), 4445. https://doi.org/10.3390/app11104445

The data sheets show actual measurements (not design curves) with typical transmission curves for unpolarized light and an AOI=0°.

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Rajak, Dipen Kumar, Ashwini Kumar, Ajit Behera, and Pradeep L. Menezes. 2021. "Diamond-Like Carbon (DLC) Coatings: Classification, Properties, and Applications" Applied Sciences 11, no. 10: 4445. https://doi.org/10.3390/app11104445

Modern filters often provide OD6 or better rejection in a very wide wavelength range. However, overspecifying blocking level and range will often lead to an increase in the number of layers in the filter causing increased production cost.

BandpassFilter thorlabs

Delta Optical Thin Film are pioneers and innovators in the design and manufacture of robust optical thin film components for a broad range of volume applications. We have designed and manufactured optical interference bandpass filters since the early 1970’ties.

Most of our products are custom designed filters and the examples we show on this webpage are just for inspiration. We often find benefits for our customers in a custom designed solution. Delta Optical Thin Film is focusing mainly on optical bandpass filters with passbands in the range from 300 nm to 1200 nm.

Editor’s Choice articles are based on recommendations by the scientific editors of MDPI journals from around the world. Editors select a small number of articles recently published in the journal that they believe will be particularly interesting to readers, or important in the respective research area. The aim is to provide a snapshot of some of the most exciting work published in the various research areas of the journal.

Optical Bandpassfilter

As we often can optimise design and manufacturing methods to the individual application, please get in touch to discuss how we can best help facilitating your application.

Optical Bandpass Filters are spectrally selective components capable of transmitting specific wavelengths of light while blocking others. These filters are fully customizable in terms of center wavelengths and bandwidths, making them suitable for a wide range of applications, including fluorescence spectroscopy, microscopy, and flow cytometry. Optical Bandpass Filters provide consistent optical filter functions across the entire clear aperture. In contrast, Continuously Variable Filters offer a filter function that varies along one dimension of the filter.

Feature papers represent the most advanced research with significant potential for high impact in the field. A Feature Paper should be a substantial original Article that involves several techniques or approaches, provides an outlook for future research directions and describes possible research applications.

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Feature papers are submitted upon individual invitation or recommendation by the scientific editors and must receive positive feedback from the reviewers.

Rajak DK, Kumar A, Behera A, Menezes PL. Diamond-Like Carbon (DLC) Coatings: Classification, Properties, and Applications. Applied Sciences. 2021; 11(10):4445. https://doi.org/10.3390/app11104445

If you cannot find the Bandpass Filter you need among our standard products, please do not hesitate to contact us to discuss your requirements. When specifying your filter, our technical note on specifying optical filters will help you avoid the main cost drivers in filter design.

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The function of a Bandpass Filter (BP filter) is described by the center wavelength of its transmission band and the with of the band. E.g. a Bandpass Filter can be described as BP578/50, which is a filter with a center wavelength of 578 nm and a bandwith of 50 nm. Within the passband, it is typical to define the minimal or average transmission level. In modern coatings, despite several hundreds of layers, minimum transmission levels of 90% is not uncommon.

Rajak, D.K.; Kumar, A.; Behera, A.; Menezes, P.L. Diamond-Like Carbon (DLC) Coatings: Classification, Properties, and Applications. Appl. Sci. 2021, 11, 4445. https://doi.org/10.3390/app11104445

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Also, deep blocking is cumbersome and slow to verify in a photo spectrometer. At Delta Optical Thin Film, we always enter into a thorough discussion with our customers to prevent unnecessary cost.

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Another important aspect of a Bandpass Filter is the rejection or blocking range and level. These parameters specify in which wavelength ranges the filter must reflect as well as the permitted transmittance at these wavelengths.