Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Passive Filters01:27

Passive Filters

Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff frequency...
Active Filters01:25

Active Filters

Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
Design Example01:23

Design Example

The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
Filtration00:53

Filtration

Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
Bandpass Sampling01:17

Bandpass Sampling

In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2. The spectrum...
Op Amp AC Circuits01:18

Op Amp AC Circuits

Within an audio system, the filter circuit plays a pivotal role in processing the amplified audio signal from an amplifier. Its primary function is significantly attenuating signal components with lower frequencies, thereby shaping the audio output. This circuit's operations are examined, focusing on the fundamental filter configuration. This configuration involves an operational amplifier arranged in an inverting setup coupled with resistors (R1 and R2) and a capacitor (C1).

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Evaluation of bone formation within β-tricalcium phosphate scaffolds in a sheep scapular bioreactor model using micro-computed tomography analysis.

Regenerative biomaterials·2026
Same author

Between the Nanosheets: Enhancing Electron-Hole Exchange Interaction for Room-Temperature Magneto-Photoluminescence in Liquid-phase-exfoliated 2D Perovskite.

ACS nano·2025
Same author

Protocol for Micro Computed Tomography Quantification of Neo-osteogenesis in High Density Additively Manufactured Calcium Phosphate Scaffolds.

ACS applied bio materials·2025
Same author

Mechanobiologically-optimized non-resorbable artificial bone for patient-matched scaffold-guided bone regeneration.

Nature communications·2025
Same author

Tailoring nanoscale interfaces for perovskite-perovskite-silicon triple-junction solar cells.

Nature nanotechnology·2025
Same author

Ab-initio dynamic study of mechanisms for dust-mediated molecular hydrogen formation in space.

Communications chemistry·2025

Related Experiment Video

Updated: Jul 19, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Flat-topped broadband rugate filters.

Anne G Imenes1, David R McKenzie

  • 1School of Physics, The University of Sydney, New South Wales, Australia. anne.imenes@csiro.au

Applied Optics
|October 28, 2006
PubMed
Summary

This study introduces a new method for designing rugate interference filters with flat-topped reflectance over broad spectral ranges. The technique uses coupled wave theory to control spatial frequency for consistent reflectivity, enabling applications like laser eye protection and solar power conversion.

More Related Videos

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Related Experiment Videos

Last Updated: Jul 19, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Area of Science:

  • Optical Engineering
  • Materials Science
  • Thin Film Optics

Background:

  • Rugate interference filters are crucial optical components.
  • Achieving flat-topped reflectance over extended spectral regions is a significant challenge.
  • Existing methods may lack the precision for broad, constant reflectance.

Purpose of the Study:

  • To present a novel method for designing rugate interference filters with flat-topped reflectance.
  • To provide a theoretical framework based on coupled wave theory for filter design.
  • To demonstrate the method's applicability in protective coatings and solar energy applications.

Main Methods:

  • Utilizing classical coupled wave theory to derive design equations.
  • Calculating the spatial frequency distribution of rugate cycles for desired reflectance.
  • Applying the method to specific optical coating and beam splitter designs.

Main Results:

  • A method to achieve flat-topped reflectance across extended spectral regions.
  • Development of a set of equations for precise spatial frequency control.
  • Successful design of a highly reflective coating for laser eye protection.
  • Design of a spectral beam splitter for efficient solar power conversion.

Conclusions:

  • The presented method offers precise control over rugate filter spectral characteristics.
  • This approach enables the creation of filters with tailored flat-topped reflectance.
  • The method has practical implications for laser safety and renewable energy technologies.