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Our mission: Bringing practical business and technical intelligence to today's structured cabling professionals

For more than 30 years, Cabling Installation & Maintenance has provided useful, practical information to professionals responsible for the specification, design, installation and management of structured cabling systems serving enterprise, data center and other environments. These professionals are challenged to stay informed of constantly evolving standards, system-design and installation approaches, product and system capabilities, technologies, as well as applications that rely on high-performance structured cabling systems. Our editors synthesize these complex issues into multiple information products. This portfolio of information products provides concrete detail that improves the efficiency of day-to-day operations, and equips cabling professionals with the perspective that enables strategic planning for networks’ optimum long-term performance.

Throughout our annual magazine, weekly email newsletters and 24/7/365 website, Cabling Installation & Maintenance digs into the essential topics our audience focuses on.

  • Design, Installation and Testing: We explain the bottom-up design of cabling systems, from case histories of actual projects to solutions for specific problems or aspects of the design process. We also look at specific installations using a case-history approach to highlight challenging problems, solutions and unique features. Additionally, we examine evolving test-and-measurement technologies and techniques designed to address the standards-governed and practical-use performance requirements of cabling systems.
  • Technology: We evaluate product innovations and technology trends as they impact a particular product class through interviews with manufacturers, installers and users, as well as contributed articles from subject-matter experts.
  • Data Center: Cabling Installation & Maintenance takes an in-depth look at design and installation workmanship issues as well as the unique technology being deployed specifically for data centers.
  • Physical Security: Focusing on the areas in which security and IT—and the infrastructure for both—interlock and overlap, we pay specific attention to Internet Protocol’s influence over the development of security applications.
  • Standards: Tracking the activities of North American and international standards-making organizations, we provide updates on specifications that are in-progress, looking forward to how they will affect cabling-system design and installation. We also produce articles explaining the practical aspects of designing and installing cabling systems in accordance with the specifications of established standards.

Cabling Installation & Maintenance is published by Endeavor Business Media, a division of EndeavorB2B.

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The application of filters across different spectral bands in the optical industry

Application of filters

The application of filters across different spectral bands in the optical industry primarily leverages their wavelength selection capabilities, enabling specific functionalities by modulating the wavelength, intensity, and other optical properties. The following outlines the primary classifications and corresponding application scenarios:

Classification based on spectral characteristics:

1. Long-pass filter (λ > cut-off wavelength) This type of filter allows wavelengths longer than the cut-off wavelength to pass through while blocking shorter wavelengths. It is commonly used in biomedical imaging and medical aesthetics. For example, fluorescence microscopes utilize long-pass filters to eliminate short-wave interfering light.

2. Short-pass filter (λ < cut-off wavelength) This filter transmits wavelengths shorter than the cut-off wavelength and attenuates longer wavelengths. It finds applications in Raman spectroscopy and astronomical observation. A practical example is the IR650 short-pass filter, which is employed in security monitoring systems to suppress infrared interference during daylight hours.

3. Narrowband filter (bandwidth < 10 nm) Narrowband filters are utilized for precise detection in fields such as LiDAR and Raman spectroscopy. For instance, the BP525 narrowband filter features a central wavelength of 525 nm, a full width at half maximum (FWHM) of only 30 nm, and a peak transmittance exceeding 90%.

4. Notch filter (stopband bandwidth < 20 nm) Notch filters are specifically designed to suppress interference within a narrow spectral range. They are widely applied in laser protection and bioluminescence imaging. An example includes the use of notch filters to block 532 nm laser emissions that may pose hazards.

Classification based on functional characteristics:

- Polarizing films These components are employed to distinguish crystal anisotropy or mitigate ambient light interference. For instance, metal wire grid polarizers can withstand high-power laser irradiation and are suitable for use in autonomous driving LiDAR systems.

- Dichroic mirrors and color separators Dichroic mirrors separate specific spectral bands with steep transition edges—for example, reflecting wavelengths below 450 nm. Spectrophotometers proportionally distribute transmitted and reflected light, a functionality frequently observed in multispectral imaging systems.

Core application scenarios: - Medical equipment: Ophthalmic laser treatment and dermatological devices require the elimination of harmful spectral bands. - Optical sensing: Fluorescence microscopes employ optical filters to detect specific fluorescent proteins, such as GFP, thereby enhancing signal-to-noise ratios. - Security monitoring: IR-CUT filter sets block infrared radiation during daytime operation to ensure accurate color reproduction in captured images. - Laser technology: Notch filters are employed to suppress laser interference, with applications spanning military defense systems and precision measurement instruments.

Media Contact
Company Name: Shangrao Jinyuan Optoelectronics Technology Co., Ltd.
Email: Send Email
Country: China
Website: https://www.jylens.com/

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